Ways to spot non-sentient, non-conscious, telepathic shapeshifters [closed]How can I make humans NOT WANT to investigate how a supernatural ability works in an intelligent, non-human creature?How to contain a shapeshifterWhat kind of technology would be developed in the process of creating shapeshifters?How to verify or establish identity where shapeshifters existHow to differentiate between different races of shape shifters?How to Train Your Mimic (or, why would a Mimic be capable of domestication)How would shapeshifters be affected by their abilities?How would photo IDs work for shapeshifters?How would tattoos for shapeshifters work?How can a team of shapeshifters communicate?

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Ways to spot non-sentient, non-conscious, telepathic shapeshifters [closed]


How can I make humans NOT WANT to investigate how a supernatural ability works in an intelligent, non-human creature?How to contain a shapeshifterWhat kind of technology would be developed in the process of creating shapeshifters?How to verify or establish identity where shapeshifters existHow to differentiate between different races of shape shifters?How to Train Your Mimic (or, why would a Mimic be capable of domestication)How would shapeshifters be affected by their abilities?How would photo IDs work for shapeshifters?How would tattoos for shapeshifters work?How can a team of shapeshifters communicate?













4












$begingroup$


In my world, there is a race of shapeshifting creatures, capable of convincingly looking like normal humans in order to lure them and prey upon them.
These creatures, however, are non-sentient and non-conscious, a bit like the aliens in Peter Watts' Blindsight.
So what do they use to trick their human preys? They use telepathy.



These creatures can read minds and can therefore act like their prey thinks they will act. If one of these shapeshifters takes the form of a person and you stumble upon them, they will act like you expect, hypothesize or hope for, all depending on what you are actively thinking in that moment.
They can handle grammar and syntax just fine by talking like you form words and sentences in your mind, and they can process all the needed info just as fast as you think them.



Their telepathy also allows them to pick up on the preferred answer that their target hopes for, so if asked "are you a shapeshifter?" the answer will be invariably negative, unless you want them to be one (in which case you probably just want to commit suicide-by-shapeshifter, because no one hopes to meet one). Their answers will always be soothing, reassuring or enticing, simply due to them being "programmed" to go for the answer that makes you feel the least fear and the most curiosity or attraction. At the very least, their answer will be as non threatening as possible given the current thoughts of their prey.
Basically their telepathy allows them to communicate a bit like a Chinese room, again, just like in Watts' novel.



They have a few limitations, chiefly that they can only use their telepathy on one mind at a time and that they can't read anything other than what the person is actively thinking. However keep in mind that it's borderline impossible to have a conversation with someone without forming expectations or thoughts on their answers in your mind, which the shapeshifter will immediately use to its advantage.
They can only shapeshift into humans or human-like forms, both by imitating a person they have seen or preyed upon or by picking something out of the mind of their next victim if they are thinking about someone in that particular moment.



Other than this, assume that their telepathy can't be blocked or jammed in any way and that their shapeshifting abilities are perfect, so that no physical evidence can be used to unmask them.
However, people do know that they exist, though these creatures are not common enough to be a constant worry. Enough to get suspicious if someone acts strangely or looks out of place but not enough to be completely paranoid.



In answering this question assume that no relevant technology is available and that no large scale countermeasures are possible, such as anti-shapeshifter laws and customs, humans have only their own individual wits on a case-by-case scenario to save them from becoming a shapeshifter's next meal.
Also consider that shapeshifters only target humans that are alone or with just another person, so they never approach more than 2 people.
If the shapeshifter manages to be approached at social distance for more than a few seconds, there's no escaping, the shapeshifter will easily overpower up to 2 humans.



With all of this said, what kind of tactics and tricks might a human pick up to spot a prowling shapeshifter effectively?










share|improve this question











$endgroup$



closed as unclear what you're asking by Hoyle's ghost, Cyn, Liam Morris, ltmauve, Arkenstein XII May 19 at 23:19


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.













  • 4




    $begingroup$
    How can a telepathic being being non conscious and non sentient?
    $endgroup$
    – L.Dutch
    May 19 at 17:06










  • $begingroup$
    In the same way your laptop doesn't need to be conscious or sentient to work, just imagine that to these shapeshifters your thoughts are like an input they are programmed to react to, just like your typing on your keyboard makes your computer do different things according to its software.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:08










  • $begingroup$
    Just tried typing into my laptop "be a nymphet", it's not transformed into one. Nor did it do so when I decided I wanted a Pizza. Since the brain (particularly the male-brain) thinks about various erotic images/scenarios when, that is, not distracted by thought about various erotic images/scenarios - how could this work?
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:15











  • $begingroup$
    As explained in the body of the question, like a Chinese room, only you don't need to actively input questions, just thinking about the Chinese room (i.e. the shapeshifter attracting your attention) is enough for it to react accordingly. Please take the time to read the linked article it as it's important to the question.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:22






  • 1




    $begingroup$
    @InquisitiveGeek Links can be broken, please take the time to edit your question to include the salient information. as per forum advice in the help center.
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:23
















4












$begingroup$


In my world, there is a race of shapeshifting creatures, capable of convincingly looking like normal humans in order to lure them and prey upon them.
These creatures, however, are non-sentient and non-conscious, a bit like the aliens in Peter Watts' Blindsight.
So what do they use to trick their human preys? They use telepathy.



These creatures can read minds and can therefore act like their prey thinks they will act. If one of these shapeshifters takes the form of a person and you stumble upon them, they will act like you expect, hypothesize or hope for, all depending on what you are actively thinking in that moment.
They can handle grammar and syntax just fine by talking like you form words and sentences in your mind, and they can process all the needed info just as fast as you think them.



Their telepathy also allows them to pick up on the preferred answer that their target hopes for, so if asked "are you a shapeshifter?" the answer will be invariably negative, unless you want them to be one (in which case you probably just want to commit suicide-by-shapeshifter, because no one hopes to meet one). Their answers will always be soothing, reassuring or enticing, simply due to them being "programmed" to go for the answer that makes you feel the least fear and the most curiosity or attraction. At the very least, their answer will be as non threatening as possible given the current thoughts of their prey.
Basically their telepathy allows them to communicate a bit like a Chinese room, again, just like in Watts' novel.



They have a few limitations, chiefly that they can only use their telepathy on one mind at a time and that they can't read anything other than what the person is actively thinking. However keep in mind that it's borderline impossible to have a conversation with someone without forming expectations or thoughts on their answers in your mind, which the shapeshifter will immediately use to its advantage.
They can only shapeshift into humans or human-like forms, both by imitating a person they have seen or preyed upon or by picking something out of the mind of their next victim if they are thinking about someone in that particular moment.



Other than this, assume that their telepathy can't be blocked or jammed in any way and that their shapeshifting abilities are perfect, so that no physical evidence can be used to unmask them.
However, people do know that they exist, though these creatures are not common enough to be a constant worry. Enough to get suspicious if someone acts strangely or looks out of place but not enough to be completely paranoid.



In answering this question assume that no relevant technology is available and that no large scale countermeasures are possible, such as anti-shapeshifter laws and customs, humans have only their own individual wits on a case-by-case scenario to save them from becoming a shapeshifter's next meal.
Also consider that shapeshifters only target humans that are alone or with just another person, so they never approach more than 2 people.
If the shapeshifter manages to be approached at social distance for more than a few seconds, there's no escaping, the shapeshifter will easily overpower up to 2 humans.



With all of this said, what kind of tactics and tricks might a human pick up to spot a prowling shapeshifter effectively?










share|improve this question











$endgroup$



closed as unclear what you're asking by Hoyle's ghost, Cyn, Liam Morris, ltmauve, Arkenstein XII May 19 at 23:19


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.













  • 4




    $begingroup$
    How can a telepathic being being non conscious and non sentient?
    $endgroup$
    – L.Dutch
    May 19 at 17:06










  • $begingroup$
    In the same way your laptop doesn't need to be conscious or sentient to work, just imagine that to these shapeshifters your thoughts are like an input they are programmed to react to, just like your typing on your keyboard makes your computer do different things according to its software.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:08










  • $begingroup$
    Just tried typing into my laptop "be a nymphet", it's not transformed into one. Nor did it do so when I decided I wanted a Pizza. Since the brain (particularly the male-brain) thinks about various erotic images/scenarios when, that is, not distracted by thought about various erotic images/scenarios - how could this work?
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:15











  • $begingroup$
    As explained in the body of the question, like a Chinese room, only you don't need to actively input questions, just thinking about the Chinese room (i.e. the shapeshifter attracting your attention) is enough for it to react accordingly. Please take the time to read the linked article it as it's important to the question.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:22






  • 1




    $begingroup$
    @InquisitiveGeek Links can be broken, please take the time to edit your question to include the salient information. as per forum advice in the help center.
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:23














4












4








4





$begingroup$


In my world, there is a race of shapeshifting creatures, capable of convincingly looking like normal humans in order to lure them and prey upon them.
These creatures, however, are non-sentient and non-conscious, a bit like the aliens in Peter Watts' Blindsight.
So what do they use to trick their human preys? They use telepathy.



These creatures can read minds and can therefore act like their prey thinks they will act. If one of these shapeshifters takes the form of a person and you stumble upon them, they will act like you expect, hypothesize or hope for, all depending on what you are actively thinking in that moment.
They can handle grammar and syntax just fine by talking like you form words and sentences in your mind, and they can process all the needed info just as fast as you think them.



Their telepathy also allows them to pick up on the preferred answer that their target hopes for, so if asked "are you a shapeshifter?" the answer will be invariably negative, unless you want them to be one (in which case you probably just want to commit suicide-by-shapeshifter, because no one hopes to meet one). Their answers will always be soothing, reassuring or enticing, simply due to them being "programmed" to go for the answer that makes you feel the least fear and the most curiosity or attraction. At the very least, their answer will be as non threatening as possible given the current thoughts of their prey.
Basically their telepathy allows them to communicate a bit like a Chinese room, again, just like in Watts' novel.



They have a few limitations, chiefly that they can only use their telepathy on one mind at a time and that they can't read anything other than what the person is actively thinking. However keep in mind that it's borderline impossible to have a conversation with someone without forming expectations or thoughts on their answers in your mind, which the shapeshifter will immediately use to its advantage.
They can only shapeshift into humans or human-like forms, both by imitating a person they have seen or preyed upon or by picking something out of the mind of their next victim if they are thinking about someone in that particular moment.



Other than this, assume that their telepathy can't be blocked or jammed in any way and that their shapeshifting abilities are perfect, so that no physical evidence can be used to unmask them.
However, people do know that they exist, though these creatures are not common enough to be a constant worry. Enough to get suspicious if someone acts strangely or looks out of place but not enough to be completely paranoid.



In answering this question assume that no relevant technology is available and that no large scale countermeasures are possible, such as anti-shapeshifter laws and customs, humans have only their own individual wits on a case-by-case scenario to save them from becoming a shapeshifter's next meal.
Also consider that shapeshifters only target humans that are alone or with just another person, so they never approach more than 2 people.
If the shapeshifter manages to be approached at social distance for more than a few seconds, there's no escaping, the shapeshifter will easily overpower up to 2 humans.



With all of this said, what kind of tactics and tricks might a human pick up to spot a prowling shapeshifter effectively?










share|improve this question











$endgroup$




In my world, there is a race of shapeshifting creatures, capable of convincingly looking like normal humans in order to lure them and prey upon them.
These creatures, however, are non-sentient and non-conscious, a bit like the aliens in Peter Watts' Blindsight.
So what do they use to trick their human preys? They use telepathy.



These creatures can read minds and can therefore act like their prey thinks they will act. If one of these shapeshifters takes the form of a person and you stumble upon them, they will act like you expect, hypothesize or hope for, all depending on what you are actively thinking in that moment.
They can handle grammar and syntax just fine by talking like you form words and sentences in your mind, and they can process all the needed info just as fast as you think them.



Their telepathy also allows them to pick up on the preferred answer that their target hopes for, so if asked "are you a shapeshifter?" the answer will be invariably negative, unless you want them to be one (in which case you probably just want to commit suicide-by-shapeshifter, because no one hopes to meet one). Their answers will always be soothing, reassuring or enticing, simply due to them being "programmed" to go for the answer that makes you feel the least fear and the most curiosity or attraction. At the very least, their answer will be as non threatening as possible given the current thoughts of their prey.
Basically their telepathy allows them to communicate a bit like a Chinese room, again, just like in Watts' novel.



They have a few limitations, chiefly that they can only use their telepathy on one mind at a time and that they can't read anything other than what the person is actively thinking. However keep in mind that it's borderline impossible to have a conversation with someone without forming expectations or thoughts on their answers in your mind, which the shapeshifter will immediately use to its advantage.
They can only shapeshift into humans or human-like forms, both by imitating a person they have seen or preyed upon or by picking something out of the mind of their next victim if they are thinking about someone in that particular moment.



Other than this, assume that their telepathy can't be blocked or jammed in any way and that their shapeshifting abilities are perfect, so that no physical evidence can be used to unmask them.
However, people do know that they exist, though these creatures are not common enough to be a constant worry. Enough to get suspicious if someone acts strangely or looks out of place but not enough to be completely paranoid.



In answering this question assume that no relevant technology is available and that no large scale countermeasures are possible, such as anti-shapeshifter laws and customs, humans have only their own individual wits on a case-by-case scenario to save them from becoming a shapeshifter's next meal.
Also consider that shapeshifters only target humans that are alone or with just another person, so they never approach more than 2 people.
If the shapeshifter manages to be approached at social distance for more than a few seconds, there's no escaping, the shapeshifter will easily overpower up to 2 humans.



With all of this said, what kind of tactics and tricks might a human pick up to spot a prowling shapeshifter effectively?







shapeshifters telepathy consciousness






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited May 19 at 17:06







Inquisitive Geek

















asked May 19 at 17:04









Inquisitive GeekInquisitive Geek

26218




26218




closed as unclear what you're asking by Hoyle's ghost, Cyn, Liam Morris, ltmauve, Arkenstein XII May 19 at 23:19


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.









closed as unclear what you're asking by Hoyle's ghost, Cyn, Liam Morris, ltmauve, Arkenstein XII May 19 at 23:19


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.









  • 4




    $begingroup$
    How can a telepathic being being non conscious and non sentient?
    $endgroup$
    – L.Dutch
    May 19 at 17:06










  • $begingroup$
    In the same way your laptop doesn't need to be conscious or sentient to work, just imagine that to these shapeshifters your thoughts are like an input they are programmed to react to, just like your typing on your keyboard makes your computer do different things according to its software.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:08










  • $begingroup$
    Just tried typing into my laptop "be a nymphet", it's not transformed into one. Nor did it do so when I decided I wanted a Pizza. Since the brain (particularly the male-brain) thinks about various erotic images/scenarios when, that is, not distracted by thought about various erotic images/scenarios - how could this work?
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:15











  • $begingroup$
    As explained in the body of the question, like a Chinese room, only you don't need to actively input questions, just thinking about the Chinese room (i.e. the shapeshifter attracting your attention) is enough for it to react accordingly. Please take the time to read the linked article it as it's important to the question.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:22






  • 1




    $begingroup$
    @InquisitiveGeek Links can be broken, please take the time to edit your question to include the salient information. as per forum advice in the help center.
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:23













  • 4




    $begingroup$
    How can a telepathic being being non conscious and non sentient?
    $endgroup$
    – L.Dutch
    May 19 at 17:06










  • $begingroup$
    In the same way your laptop doesn't need to be conscious or sentient to work, just imagine that to these shapeshifters your thoughts are like an input they are programmed to react to, just like your typing on your keyboard makes your computer do different things according to its software.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:08










  • $begingroup$
    Just tried typing into my laptop "be a nymphet", it's not transformed into one. Nor did it do so when I decided I wanted a Pizza. Since the brain (particularly the male-brain) thinks about various erotic images/scenarios when, that is, not distracted by thought about various erotic images/scenarios - how could this work?
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:15











  • $begingroup$
    As explained in the body of the question, like a Chinese room, only you don't need to actively input questions, just thinking about the Chinese room (i.e. the shapeshifter attracting your attention) is enough for it to react accordingly. Please take the time to read the linked article it as it's important to the question.
    $endgroup$
    – Inquisitive Geek
    May 19 at 17:22






  • 1




    $begingroup$
    @InquisitiveGeek Links can be broken, please take the time to edit your question to include the salient information. as per forum advice in the help center.
    $endgroup$
    – Hoyle's ghost
    May 19 at 17:23








4




4




$begingroup$
How can a telepathic being being non conscious and non sentient?
$endgroup$
– L.Dutch
May 19 at 17:06




$begingroup$
How can a telepathic being being non conscious and non sentient?
$endgroup$
– L.Dutch
May 19 at 17:06












$begingroup$
In the same way your laptop doesn't need to be conscious or sentient to work, just imagine that to these shapeshifters your thoughts are like an input they are programmed to react to, just like your typing on your keyboard makes your computer do different things according to its software.
$endgroup$
– Inquisitive Geek
May 19 at 17:08




$begingroup$
In the same way your laptop doesn't need to be conscious or sentient to work, just imagine that to these shapeshifters your thoughts are like an input they are programmed to react to, just like your typing on your keyboard makes your computer do different things according to its software.
$endgroup$
– Inquisitive Geek
May 19 at 17:08












$begingroup$
Just tried typing into my laptop "be a nymphet", it's not transformed into one. Nor did it do so when I decided I wanted a Pizza. Since the brain (particularly the male-brain) thinks about various erotic images/scenarios when, that is, not distracted by thought about various erotic images/scenarios - how could this work?
$endgroup$
– Hoyle's ghost
May 19 at 17:15





$begingroup$
Just tried typing into my laptop "be a nymphet", it's not transformed into one. Nor did it do so when I decided I wanted a Pizza. Since the brain (particularly the male-brain) thinks about various erotic images/scenarios when, that is, not distracted by thought about various erotic images/scenarios - how could this work?
$endgroup$
– Hoyle's ghost
May 19 at 17:15













$begingroup$
As explained in the body of the question, like a Chinese room, only you don't need to actively input questions, just thinking about the Chinese room (i.e. the shapeshifter attracting your attention) is enough for it to react accordingly. Please take the time to read the linked article it as it's important to the question.
$endgroup$
– Inquisitive Geek
May 19 at 17:22




$begingroup$
As explained in the body of the question, like a Chinese room, only you don't need to actively input questions, just thinking about the Chinese room (i.e. the shapeshifter attracting your attention) is enough for it to react accordingly. Please take the time to read the linked article it as it's important to the question.
$endgroup$
– Inquisitive Geek
May 19 at 17:22




1




1




$begingroup$
@InquisitiveGeek Links can be broken, please take the time to edit your question to include the salient information. as per forum advice in the help center.
$endgroup$
– Hoyle's ghost
May 19 at 17:23





$begingroup$
@InquisitiveGeek Links can be broken, please take the time to edit your question to include the salient information. as per forum advice in the help center.
$endgroup$
– Hoyle's ghost
May 19 at 17:23











6 Answers
6






active

oldest

votes


















3












$begingroup$

One way to spot such shapeshifters is a variant of the shibboleth, in which you ask a question whose answer you ignore, but are able to easily verify once it's given.



For example you can ask two numbers and their sum. The shapeshifter will not be able to come up with these numbers (much less the sum), unless it reads them off your active thoughts, which means that you know the numbers, so they're not valid.



Once you hear the two numbers - meanwhile, you concentrate hard on adding some other number - you can verify the sum.



Again, most people will quickly pick a favorite pair, which means that they'll have a competing thought in their minds - but the chances of two people choosing the same pair are very slight.



Whoever fails three sums in a row has to be a shapeshifter, or really really bad at math.



Another possibility would be to carry two large wooden dices, and throw them on the ground without looking at them, then asking the stranger to read the result.



Or a box with a deck of large cards. Throw it the box, and tell them to shuffle the deck, then look at each card and then show it to you. The shapeshifter won't be able to recognize the cards, nor to read them in your mind, and it cannot lie without being immediately caught.






share|improve this answer











$endgroup$












  • $begingroup$
    You could just request an open ended question: suspecting him a shapeshifter, he said "I say sir, can you name a prime, perhaps three or four?" This is kind of like first gen cryptography.
    $endgroup$
    – fredsbend
    May 19 at 19:23







  • 4




    $begingroup$
    @fredsbend the problem there is that the answers you want are going to be right there to be read back at you. You need to be able to ask a question to which you don't know the answer, hence why dice or cards are useful.
    $endgroup$
    – Starfish Prime
    May 19 at 20:08


















2












$begingroup$

A deck of ordinary playing cards seems to be a pretty good solution. Give the deck a few good shuffles every now and then so the order is completely randomized and you have no way of knowing the order. Then, if you're having a conversation with someone that you aren't sure of, deal 'em a poker hand and ask them to name the cards they have. (You may want to get a safe distance away after giving them the poker hand, and possibly ready your non-anachronistic lethal weapon of choice.) Imagine a royal flush while doing so, or really any given poker hand of five cards. When they name their hand, just riffle through the deck. If they're human, they'll name the five cards that aren't there. If they aren't - well, then they've got a 1 in ~ 2.5 million chance of naming all five cards correctly, because those are your odds of correctly guessing those five cards. (My math might be a bit off - I just did a back of the envelope from poker odds.)



Now, if you've got tech or magic, a talking 8-ball is even better. Rig up one that randomly generates a color out of eight given (primaries and secondaries, plus black and white) and then will loudly announce the color after a five second pause. Toss the ball to the suspected NSNCTS and run about six rounds of it. Should only take half a minute, and the odds are 1/ 262144. The idea here is to give the target easily confirmed information that only the target knows at the time.






share|improve this answer










New contributor



Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





$endgroup$












  • $begingroup$
    To make things faster: just use Hearts so you have fewer cards to run through. Bonus points if you imagine a straight flush of spades and they fall for it.
    $endgroup$
    – Joe Bloggs
    May 19 at 19:08










  • $begingroup$
    I'm assuming the worse case scenario here, in which case you can't throw them off by merely imagining what you want them to say if it's clearly wrong, i.e. asking them the color of the sky, and then imagining the sky is red. Same thing with using an all-hearts deck and imagining a spades hand. But I suppose if it works, it'd be much easier.
    $endgroup$
    – Halfthawed
    May 19 at 19:10










  • $begingroup$
    That’s why it was the bonus point scenario. Mostly I meant that checking through 8 cards for the stated 5 is faster than checking through 47. :-)
    $endgroup$
    – Joe Bloggs
    May 19 at 19:14










  • $begingroup$
    At that point, it's really just a matter of preference. Odds of correctly labeling 5 picked cards out of 13 is 1 / 1287. If you feel comfortable betting your life on those odds, go ahead.
    $endgroup$
    – Halfthawed
    May 19 at 19:20










  • $begingroup$
    Seems easier just to use number cards, deal a couple without looking at them and ask the to tell you the sum. Once they've done that, they can turn the cards over and you can verify. No need for the hassle of shuffling through an entire deck of cards in close proximity to a possible killer monster, and no need for probabilistic shortcuts.
    $endgroup$
    – Starfish Prime
    May 19 at 20:11


















1












$begingroup$


people do know that they exist




I cannot imagine how the existence could be discovered of a predator whose total design is so conveniently ironclad.




I imagine a person that suspects they're under threat would deliberately fabricate a fake person and then concentrate on that fake person while traveling through insecure areas. A community would immediately retreat into secure, isolated areas.



So, forgetting the absolute implausibility of how this could even be true: you are suddenly put on notice that one of these killing machines is in your area. You know, like an Amber Alert. What do you do? Well, your house is safe, so you can just keep the door locked and stay indoors. But you eventually have to get groceries. Before leaving, you pull out your book of Leeroy Jenkins fan-art and study it carefully until you have a really solid picture of him in your head. Then you go outside and hurry to the store, concentrating on Leeroy and how badly you hope to meet him, and pushing all other thoughts out of your head.



If a shapeshifter becomes aware of you before you notice it, it will shift into your picture of Leeroy Jenkins. If you meet Leeroy Jenkins, you will kill him.



If you encounter any other non-humans on your route, all of you will stay away from each other out of mutual distrust. If anyone approaches you, you will kill them.






share|improve this answer









$endgroup$












  • $begingroup$
    Wouldn't the shapeshifter just make sure to not appear to be Leeroy, then? Seems the shapeshifter would pick up on the fact that the reason that you're thinking about Leeroy is to kill him, hence they'd not look like him.
    $endgroup$
    – user45266
    May 19 at 22:57


















1












$begingroup$

Assuming they can't do higher level reasoning by themselves:



  1. Ask someone to curate a list of questions that you have never seen before. These could be combination of math questions like 10x43=? and open ended questions like "how can we solve world hunger?", captcha style questions like "how many oranges are in this photo?" Always keep this list with you, but never look at it.

  2. When you think someone may be a shapeshifter, give them the list. Ask them to choose any 3 questions without telling you and write down the thought process/ answer somewhere. When you review the answers it should be clear if they are capable of independent thought or not (correctness does not matter, just the thought process)

Not sure if phones/computers are acceptable technology in your world, but it is simple to make an app specifically for this that generates random questions/captchas and can check the answers (no human involved = no chance of reading thoughts).



It is important that you don't know the problem already, since you might imagine the method to solve it, which they might read and follow. Imagining "the wrong answer" may not work either since your thoughts contain the information that the answer is wrong so they won't choose it (it is impossible to block your own thoughts about it). The only solution is to truly be unaware of the problem itself.






share|improve this answer








New contributor



AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





$endgroup$




















    1












    $begingroup$

    How smart are they?



    If you ask them a question that you don't know the answer to yet, but can figure out if you choose to, you're golden. Examples:




    "Hey, what's behind me right now?" If they're a dumb shapeshifter (and they're not sentient, so they probably are dumb), they won't really know the answer. Then you turn around and verify their response.



    "Pick a tree branch, and tell me how many leaves are on it"



    "Go over there, and name as many objects as you can in that room"



    Or the classic "How many jellybeans are in the jar"? (tell them to open the jar and count)






    share|improve this answer









    $endgroup$




















      -1












      $begingroup$

      I'm concerned that you've given them too much power. You need to evaluate if you actually want them to be this powerful. The biggest issue is they can overpower two humans, in addition to their devilishly precise impersonations. It makes one wonder why they impersonate at all if they can be brutes too.



      If you want them to have a flaw, make them weak, but fatally venomous. Three humans will always win a fight against one, but at great risk. Two probably will. One might, if he's trained.



      LSerni's answer is clever. Particular question types are easy to verify but difficult to answer. Something like: "Please give me the sum of two primes, then the two numbers". That's pretty easy to verify, but takes intelligence to answer.



      In a different vein, while traveling alone, the wary are trained to dwell on the impossible. If you're thinking of conversation with your dead grandma, or replaying a movie scene with Luke Skywalker in your head, a shapeshifter is more likely to assume one of those forms. It would be instantly revealed.




      As an aside, this is similar to Harry Potter's creature the Boggart. You might find some inspiration there.






      share|improve this answer









      $endgroup$












      • $begingroup$
        Some feedback if you downvote is helpful.
        $endgroup$
        – fredsbend
        May 20 at 0:40

















      6 Answers
      6






      active

      oldest

      votes








      6 Answers
      6






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      3












      $begingroup$

      One way to spot such shapeshifters is a variant of the shibboleth, in which you ask a question whose answer you ignore, but are able to easily verify once it's given.



      For example you can ask two numbers and their sum. The shapeshifter will not be able to come up with these numbers (much less the sum), unless it reads them off your active thoughts, which means that you know the numbers, so they're not valid.



      Once you hear the two numbers - meanwhile, you concentrate hard on adding some other number - you can verify the sum.



      Again, most people will quickly pick a favorite pair, which means that they'll have a competing thought in their minds - but the chances of two people choosing the same pair are very slight.



      Whoever fails three sums in a row has to be a shapeshifter, or really really bad at math.



      Another possibility would be to carry two large wooden dices, and throw them on the ground without looking at them, then asking the stranger to read the result.



      Or a box with a deck of large cards. Throw it the box, and tell them to shuffle the deck, then look at each card and then show it to you. The shapeshifter won't be able to recognize the cards, nor to read them in your mind, and it cannot lie without being immediately caught.






      share|improve this answer











      $endgroup$












      • $begingroup$
        You could just request an open ended question: suspecting him a shapeshifter, he said "I say sir, can you name a prime, perhaps three or four?" This is kind of like first gen cryptography.
        $endgroup$
        – fredsbend
        May 19 at 19:23







      • 4




        $begingroup$
        @fredsbend the problem there is that the answers you want are going to be right there to be read back at you. You need to be able to ask a question to which you don't know the answer, hence why dice or cards are useful.
        $endgroup$
        – Starfish Prime
        May 19 at 20:08















      3












      $begingroup$

      One way to spot such shapeshifters is a variant of the shibboleth, in which you ask a question whose answer you ignore, but are able to easily verify once it's given.



      For example you can ask two numbers and their sum. The shapeshifter will not be able to come up with these numbers (much less the sum), unless it reads them off your active thoughts, which means that you know the numbers, so they're not valid.



      Once you hear the two numbers - meanwhile, you concentrate hard on adding some other number - you can verify the sum.



      Again, most people will quickly pick a favorite pair, which means that they'll have a competing thought in their minds - but the chances of two people choosing the same pair are very slight.



      Whoever fails three sums in a row has to be a shapeshifter, or really really bad at math.



      Another possibility would be to carry two large wooden dices, and throw them on the ground without looking at them, then asking the stranger to read the result.



      Or a box with a deck of large cards. Throw it the box, and tell them to shuffle the deck, then look at each card and then show it to you. The shapeshifter won't be able to recognize the cards, nor to read them in your mind, and it cannot lie without being immediately caught.






      share|improve this answer











      $endgroup$












      • $begingroup$
        You could just request an open ended question: suspecting him a shapeshifter, he said "I say sir, can you name a prime, perhaps three or four?" This is kind of like first gen cryptography.
        $endgroup$
        – fredsbend
        May 19 at 19:23







      • 4




        $begingroup$
        @fredsbend the problem there is that the answers you want are going to be right there to be read back at you. You need to be able to ask a question to which you don't know the answer, hence why dice or cards are useful.
        $endgroup$
        – Starfish Prime
        May 19 at 20:08













      3












      3








      3





      $begingroup$

      One way to spot such shapeshifters is a variant of the shibboleth, in which you ask a question whose answer you ignore, but are able to easily verify once it's given.



      For example you can ask two numbers and their sum. The shapeshifter will not be able to come up with these numbers (much less the sum), unless it reads them off your active thoughts, which means that you know the numbers, so they're not valid.



      Once you hear the two numbers - meanwhile, you concentrate hard on adding some other number - you can verify the sum.



      Again, most people will quickly pick a favorite pair, which means that they'll have a competing thought in their minds - but the chances of two people choosing the same pair are very slight.



      Whoever fails three sums in a row has to be a shapeshifter, or really really bad at math.



      Another possibility would be to carry two large wooden dices, and throw them on the ground without looking at them, then asking the stranger to read the result.



      Or a box with a deck of large cards. Throw it the box, and tell them to shuffle the deck, then look at each card and then show it to you. The shapeshifter won't be able to recognize the cards, nor to read them in your mind, and it cannot lie without being immediately caught.






      share|improve this answer











      $endgroup$



      One way to spot such shapeshifters is a variant of the shibboleth, in which you ask a question whose answer you ignore, but are able to easily verify once it's given.



      For example you can ask two numbers and their sum. The shapeshifter will not be able to come up with these numbers (much less the sum), unless it reads them off your active thoughts, which means that you know the numbers, so they're not valid.



      Once you hear the two numbers - meanwhile, you concentrate hard on adding some other number - you can verify the sum.



      Again, most people will quickly pick a favorite pair, which means that they'll have a competing thought in their minds - but the chances of two people choosing the same pair are very slight.



      Whoever fails three sums in a row has to be a shapeshifter, or really really bad at math.



      Another possibility would be to carry two large wooden dices, and throw them on the ground without looking at them, then asking the stranger to read the result.



      Or a box with a deck of large cards. Throw it the box, and tell them to shuffle the deck, then look at each card and then show it to you. The shapeshifter won't be able to recognize the cards, nor to read them in your mind, and it cannot lie without being immediately caught.







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited May 19 at 20:20

























      answered May 19 at 18:16









      LSerniLSerni

      30.8k25499




      30.8k25499











      • $begingroup$
        You could just request an open ended question: suspecting him a shapeshifter, he said "I say sir, can you name a prime, perhaps three or four?" This is kind of like first gen cryptography.
        $endgroup$
        – fredsbend
        May 19 at 19:23







      • 4




        $begingroup$
        @fredsbend the problem there is that the answers you want are going to be right there to be read back at you. You need to be able to ask a question to which you don't know the answer, hence why dice or cards are useful.
        $endgroup$
        – Starfish Prime
        May 19 at 20:08
















      • $begingroup$
        You could just request an open ended question: suspecting him a shapeshifter, he said "I say sir, can you name a prime, perhaps three or four?" This is kind of like first gen cryptography.
        $endgroup$
        – fredsbend
        May 19 at 19:23







      • 4




        $begingroup$
        @fredsbend the problem there is that the answers you want are going to be right there to be read back at you. You need to be able to ask a question to which you don't know the answer, hence why dice or cards are useful.
        $endgroup$
        – Starfish Prime
        May 19 at 20:08















      $begingroup$
      You could just request an open ended question: suspecting him a shapeshifter, he said "I say sir, can you name a prime, perhaps three or four?" This is kind of like first gen cryptography.
      $endgroup$
      – fredsbend
      May 19 at 19:23





      $begingroup$
      You could just request an open ended question: suspecting him a shapeshifter, he said "I say sir, can you name a prime, perhaps three or four?" This is kind of like first gen cryptography.
      $endgroup$
      – fredsbend
      May 19 at 19:23





      4




      4




      $begingroup$
      @fredsbend the problem there is that the answers you want are going to be right there to be read back at you. You need to be able to ask a question to which you don't know the answer, hence why dice or cards are useful.
      $endgroup$
      – Starfish Prime
      May 19 at 20:08




      $begingroup$
      @fredsbend the problem there is that the answers you want are going to be right there to be read back at you. You need to be able to ask a question to which you don't know the answer, hence why dice or cards are useful.
      $endgroup$
      – Starfish Prime
      May 19 at 20:08











      2












      $begingroup$

      A deck of ordinary playing cards seems to be a pretty good solution. Give the deck a few good shuffles every now and then so the order is completely randomized and you have no way of knowing the order. Then, if you're having a conversation with someone that you aren't sure of, deal 'em a poker hand and ask them to name the cards they have. (You may want to get a safe distance away after giving them the poker hand, and possibly ready your non-anachronistic lethal weapon of choice.) Imagine a royal flush while doing so, or really any given poker hand of five cards. When they name their hand, just riffle through the deck. If they're human, they'll name the five cards that aren't there. If they aren't - well, then they've got a 1 in ~ 2.5 million chance of naming all five cards correctly, because those are your odds of correctly guessing those five cards. (My math might be a bit off - I just did a back of the envelope from poker odds.)



      Now, if you've got tech or magic, a talking 8-ball is even better. Rig up one that randomly generates a color out of eight given (primaries and secondaries, plus black and white) and then will loudly announce the color after a five second pause. Toss the ball to the suspected NSNCTS and run about six rounds of it. Should only take half a minute, and the odds are 1/ 262144. The idea here is to give the target easily confirmed information that only the target knows at the time.






      share|improve this answer










      New contributor



      Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      $endgroup$












      • $begingroup$
        To make things faster: just use Hearts so you have fewer cards to run through. Bonus points if you imagine a straight flush of spades and they fall for it.
        $endgroup$
        – Joe Bloggs
        May 19 at 19:08










      • $begingroup$
        I'm assuming the worse case scenario here, in which case you can't throw them off by merely imagining what you want them to say if it's clearly wrong, i.e. asking them the color of the sky, and then imagining the sky is red. Same thing with using an all-hearts deck and imagining a spades hand. But I suppose if it works, it'd be much easier.
        $endgroup$
        – Halfthawed
        May 19 at 19:10










      • $begingroup$
        That’s why it was the bonus point scenario. Mostly I meant that checking through 8 cards for the stated 5 is faster than checking through 47. :-)
        $endgroup$
        – Joe Bloggs
        May 19 at 19:14










      • $begingroup$
        At that point, it's really just a matter of preference. Odds of correctly labeling 5 picked cards out of 13 is 1 / 1287. If you feel comfortable betting your life on those odds, go ahead.
        $endgroup$
        – Halfthawed
        May 19 at 19:20










      • $begingroup$
        Seems easier just to use number cards, deal a couple without looking at them and ask the to tell you the sum. Once they've done that, they can turn the cards over and you can verify. No need for the hassle of shuffling through an entire deck of cards in close proximity to a possible killer monster, and no need for probabilistic shortcuts.
        $endgroup$
        – Starfish Prime
        May 19 at 20:11















      2












      $begingroup$

      A deck of ordinary playing cards seems to be a pretty good solution. Give the deck a few good shuffles every now and then so the order is completely randomized and you have no way of knowing the order. Then, if you're having a conversation with someone that you aren't sure of, deal 'em a poker hand and ask them to name the cards they have. (You may want to get a safe distance away after giving them the poker hand, and possibly ready your non-anachronistic lethal weapon of choice.) Imagine a royal flush while doing so, or really any given poker hand of five cards. When they name their hand, just riffle through the deck. If they're human, they'll name the five cards that aren't there. If they aren't - well, then they've got a 1 in ~ 2.5 million chance of naming all five cards correctly, because those are your odds of correctly guessing those five cards. (My math might be a bit off - I just did a back of the envelope from poker odds.)



      Now, if you've got tech or magic, a talking 8-ball is even better. Rig up one that randomly generates a color out of eight given (primaries and secondaries, plus black and white) and then will loudly announce the color after a five second pause. Toss the ball to the suspected NSNCTS and run about six rounds of it. Should only take half a minute, and the odds are 1/ 262144. The idea here is to give the target easily confirmed information that only the target knows at the time.






      share|improve this answer










      New contributor



      Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      $endgroup$












      • $begingroup$
        To make things faster: just use Hearts so you have fewer cards to run through. Bonus points if you imagine a straight flush of spades and they fall for it.
        $endgroup$
        – Joe Bloggs
        May 19 at 19:08










      • $begingroup$
        I'm assuming the worse case scenario here, in which case you can't throw them off by merely imagining what you want them to say if it's clearly wrong, i.e. asking them the color of the sky, and then imagining the sky is red. Same thing with using an all-hearts deck and imagining a spades hand. But I suppose if it works, it'd be much easier.
        $endgroup$
        – Halfthawed
        May 19 at 19:10










      • $begingroup$
        That’s why it was the bonus point scenario. Mostly I meant that checking through 8 cards for the stated 5 is faster than checking through 47. :-)
        $endgroup$
        – Joe Bloggs
        May 19 at 19:14










      • $begingroup$
        At that point, it's really just a matter of preference. Odds of correctly labeling 5 picked cards out of 13 is 1 / 1287. If you feel comfortable betting your life on those odds, go ahead.
        $endgroup$
        – Halfthawed
        May 19 at 19:20










      • $begingroup$
        Seems easier just to use number cards, deal a couple without looking at them and ask the to tell you the sum. Once they've done that, they can turn the cards over and you can verify. No need for the hassle of shuffling through an entire deck of cards in close proximity to a possible killer monster, and no need for probabilistic shortcuts.
        $endgroup$
        – Starfish Prime
        May 19 at 20:11













      2












      2








      2





      $begingroup$

      A deck of ordinary playing cards seems to be a pretty good solution. Give the deck a few good shuffles every now and then so the order is completely randomized and you have no way of knowing the order. Then, if you're having a conversation with someone that you aren't sure of, deal 'em a poker hand and ask them to name the cards they have. (You may want to get a safe distance away after giving them the poker hand, and possibly ready your non-anachronistic lethal weapon of choice.) Imagine a royal flush while doing so, or really any given poker hand of five cards. When they name their hand, just riffle through the deck. If they're human, they'll name the five cards that aren't there. If they aren't - well, then they've got a 1 in ~ 2.5 million chance of naming all five cards correctly, because those are your odds of correctly guessing those five cards. (My math might be a bit off - I just did a back of the envelope from poker odds.)



      Now, if you've got tech or magic, a talking 8-ball is even better. Rig up one that randomly generates a color out of eight given (primaries and secondaries, plus black and white) and then will loudly announce the color after a five second pause. Toss the ball to the suspected NSNCTS and run about six rounds of it. Should only take half a minute, and the odds are 1/ 262144. The idea here is to give the target easily confirmed information that only the target knows at the time.






      share|improve this answer










      New contributor



      Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      $endgroup$



      A deck of ordinary playing cards seems to be a pretty good solution. Give the deck a few good shuffles every now and then so the order is completely randomized and you have no way of knowing the order. Then, if you're having a conversation with someone that you aren't sure of, deal 'em a poker hand and ask them to name the cards they have. (You may want to get a safe distance away after giving them the poker hand, and possibly ready your non-anachronistic lethal weapon of choice.) Imagine a royal flush while doing so, or really any given poker hand of five cards. When they name their hand, just riffle through the deck. If they're human, they'll name the five cards that aren't there. If they aren't - well, then they've got a 1 in ~ 2.5 million chance of naming all five cards correctly, because those are your odds of correctly guessing those five cards. (My math might be a bit off - I just did a back of the envelope from poker odds.)



      Now, if you've got tech or magic, a talking 8-ball is even better. Rig up one that randomly generates a color out of eight given (primaries and secondaries, plus black and white) and then will loudly announce the color after a five second pause. Toss the ball to the suspected NSNCTS and run about six rounds of it. Should only take half a minute, and the odds are 1/ 262144. The idea here is to give the target easily confirmed information that only the target knows at the time.







      share|improve this answer










      New contributor



      Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      share|improve this answer



      share|improve this answer








      edited May 19 at 20:32









      Renan

      57k15128283




      57k15128283






      New contributor



      Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      answered May 19 at 18:17









      HalfthawedHalfthawed

      958111




      958111




      New contributor



      Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.




      New contributor




      Halfthawed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.













      • $begingroup$
        To make things faster: just use Hearts so you have fewer cards to run through. Bonus points if you imagine a straight flush of spades and they fall for it.
        $endgroup$
        – Joe Bloggs
        May 19 at 19:08










      • $begingroup$
        I'm assuming the worse case scenario here, in which case you can't throw them off by merely imagining what you want them to say if it's clearly wrong, i.e. asking them the color of the sky, and then imagining the sky is red. Same thing with using an all-hearts deck and imagining a spades hand. But I suppose if it works, it'd be much easier.
        $endgroup$
        – Halfthawed
        May 19 at 19:10










      • $begingroup$
        That’s why it was the bonus point scenario. Mostly I meant that checking through 8 cards for the stated 5 is faster than checking through 47. :-)
        $endgroup$
        – Joe Bloggs
        May 19 at 19:14










      • $begingroup$
        At that point, it's really just a matter of preference. Odds of correctly labeling 5 picked cards out of 13 is 1 / 1287. If you feel comfortable betting your life on those odds, go ahead.
        $endgroup$
        – Halfthawed
        May 19 at 19:20










      • $begingroup$
        Seems easier just to use number cards, deal a couple without looking at them and ask the to tell you the sum. Once they've done that, they can turn the cards over and you can verify. No need for the hassle of shuffling through an entire deck of cards in close proximity to a possible killer monster, and no need for probabilistic shortcuts.
        $endgroup$
        – Starfish Prime
        May 19 at 20:11
















      • $begingroup$
        To make things faster: just use Hearts so you have fewer cards to run through. Bonus points if you imagine a straight flush of spades and they fall for it.
        $endgroup$
        – Joe Bloggs
        May 19 at 19:08










      • $begingroup$
        I'm assuming the worse case scenario here, in which case you can't throw them off by merely imagining what you want them to say if it's clearly wrong, i.e. asking them the color of the sky, and then imagining the sky is red. Same thing with using an all-hearts deck and imagining a spades hand. But I suppose if it works, it'd be much easier.
        $endgroup$
        – Halfthawed
        May 19 at 19:10










      • $begingroup$
        That’s why it was the bonus point scenario. Mostly I meant that checking through 8 cards for the stated 5 is faster than checking through 47. :-)
        $endgroup$
        – Joe Bloggs
        May 19 at 19:14










      • $begingroup$
        At that point, it's really just a matter of preference. Odds of correctly labeling 5 picked cards out of 13 is 1 / 1287. If you feel comfortable betting your life on those odds, go ahead.
        $endgroup$
        – Halfthawed
        May 19 at 19:20










      • $begingroup$
        Seems easier just to use number cards, deal a couple without looking at them and ask the to tell you the sum. Once they've done that, they can turn the cards over and you can verify. No need for the hassle of shuffling through an entire deck of cards in close proximity to a possible killer monster, and no need for probabilistic shortcuts.
        $endgroup$
        – Starfish Prime
        May 19 at 20:11















      $begingroup$
      To make things faster: just use Hearts so you have fewer cards to run through. Bonus points if you imagine a straight flush of spades and they fall for it.
      $endgroup$
      – Joe Bloggs
      May 19 at 19:08




      $begingroup$
      To make things faster: just use Hearts so you have fewer cards to run through. Bonus points if you imagine a straight flush of spades and they fall for it.
      $endgroup$
      – Joe Bloggs
      May 19 at 19:08












      $begingroup$
      I'm assuming the worse case scenario here, in which case you can't throw them off by merely imagining what you want them to say if it's clearly wrong, i.e. asking them the color of the sky, and then imagining the sky is red. Same thing with using an all-hearts deck and imagining a spades hand. But I suppose if it works, it'd be much easier.
      $endgroup$
      – Halfthawed
      May 19 at 19:10




      $begingroup$
      I'm assuming the worse case scenario here, in which case you can't throw them off by merely imagining what you want them to say if it's clearly wrong, i.e. asking them the color of the sky, and then imagining the sky is red. Same thing with using an all-hearts deck and imagining a spades hand. But I suppose if it works, it'd be much easier.
      $endgroup$
      – Halfthawed
      May 19 at 19:10












      $begingroup$
      That’s why it was the bonus point scenario. Mostly I meant that checking through 8 cards for the stated 5 is faster than checking through 47. :-)
      $endgroup$
      – Joe Bloggs
      May 19 at 19:14




      $begingroup$
      That’s why it was the bonus point scenario. Mostly I meant that checking through 8 cards for the stated 5 is faster than checking through 47. :-)
      $endgroup$
      – Joe Bloggs
      May 19 at 19:14












      $begingroup$
      At that point, it's really just a matter of preference. Odds of correctly labeling 5 picked cards out of 13 is 1 / 1287. If you feel comfortable betting your life on those odds, go ahead.
      $endgroup$
      – Halfthawed
      May 19 at 19:20




      $begingroup$
      At that point, it's really just a matter of preference. Odds of correctly labeling 5 picked cards out of 13 is 1 / 1287. If you feel comfortable betting your life on those odds, go ahead.
      $endgroup$
      – Halfthawed
      May 19 at 19:20












      $begingroup$
      Seems easier just to use number cards, deal a couple without looking at them and ask the to tell you the sum. Once they've done that, they can turn the cards over and you can verify. No need for the hassle of shuffling through an entire deck of cards in close proximity to a possible killer monster, and no need for probabilistic shortcuts.
      $endgroup$
      – Starfish Prime
      May 19 at 20:11




      $begingroup$
      Seems easier just to use number cards, deal a couple without looking at them and ask the to tell you the sum. Once they've done that, they can turn the cards over and you can verify. No need for the hassle of shuffling through an entire deck of cards in close proximity to a possible killer monster, and no need for probabilistic shortcuts.
      $endgroup$
      – Starfish Prime
      May 19 at 20:11











      1












      $begingroup$


      people do know that they exist




      I cannot imagine how the existence could be discovered of a predator whose total design is so conveniently ironclad.




      I imagine a person that suspects they're under threat would deliberately fabricate a fake person and then concentrate on that fake person while traveling through insecure areas. A community would immediately retreat into secure, isolated areas.



      So, forgetting the absolute implausibility of how this could even be true: you are suddenly put on notice that one of these killing machines is in your area. You know, like an Amber Alert. What do you do? Well, your house is safe, so you can just keep the door locked and stay indoors. But you eventually have to get groceries. Before leaving, you pull out your book of Leeroy Jenkins fan-art and study it carefully until you have a really solid picture of him in your head. Then you go outside and hurry to the store, concentrating on Leeroy and how badly you hope to meet him, and pushing all other thoughts out of your head.



      If a shapeshifter becomes aware of you before you notice it, it will shift into your picture of Leeroy Jenkins. If you meet Leeroy Jenkins, you will kill him.



      If you encounter any other non-humans on your route, all of you will stay away from each other out of mutual distrust. If anyone approaches you, you will kill them.






      share|improve this answer









      $endgroup$












      • $begingroup$
        Wouldn't the shapeshifter just make sure to not appear to be Leeroy, then? Seems the shapeshifter would pick up on the fact that the reason that you're thinking about Leeroy is to kill him, hence they'd not look like him.
        $endgroup$
        – user45266
        May 19 at 22:57















      1












      $begingroup$


      people do know that they exist




      I cannot imagine how the existence could be discovered of a predator whose total design is so conveniently ironclad.




      I imagine a person that suspects they're under threat would deliberately fabricate a fake person and then concentrate on that fake person while traveling through insecure areas. A community would immediately retreat into secure, isolated areas.



      So, forgetting the absolute implausibility of how this could even be true: you are suddenly put on notice that one of these killing machines is in your area. You know, like an Amber Alert. What do you do? Well, your house is safe, so you can just keep the door locked and stay indoors. But you eventually have to get groceries. Before leaving, you pull out your book of Leeroy Jenkins fan-art and study it carefully until you have a really solid picture of him in your head. Then you go outside and hurry to the store, concentrating on Leeroy and how badly you hope to meet him, and pushing all other thoughts out of your head.



      If a shapeshifter becomes aware of you before you notice it, it will shift into your picture of Leeroy Jenkins. If you meet Leeroy Jenkins, you will kill him.



      If you encounter any other non-humans on your route, all of you will stay away from each other out of mutual distrust. If anyone approaches you, you will kill them.






      share|improve this answer









      $endgroup$












      • $begingroup$
        Wouldn't the shapeshifter just make sure to not appear to be Leeroy, then? Seems the shapeshifter would pick up on the fact that the reason that you're thinking about Leeroy is to kill him, hence they'd not look like him.
        $endgroup$
        – user45266
        May 19 at 22:57













      1












      1








      1





      $begingroup$


      people do know that they exist




      I cannot imagine how the existence could be discovered of a predator whose total design is so conveniently ironclad.




      I imagine a person that suspects they're under threat would deliberately fabricate a fake person and then concentrate on that fake person while traveling through insecure areas. A community would immediately retreat into secure, isolated areas.



      So, forgetting the absolute implausibility of how this could even be true: you are suddenly put on notice that one of these killing machines is in your area. You know, like an Amber Alert. What do you do? Well, your house is safe, so you can just keep the door locked and stay indoors. But you eventually have to get groceries. Before leaving, you pull out your book of Leeroy Jenkins fan-art and study it carefully until you have a really solid picture of him in your head. Then you go outside and hurry to the store, concentrating on Leeroy and how badly you hope to meet him, and pushing all other thoughts out of your head.



      If a shapeshifter becomes aware of you before you notice it, it will shift into your picture of Leeroy Jenkins. If you meet Leeroy Jenkins, you will kill him.



      If you encounter any other non-humans on your route, all of you will stay away from each other out of mutual distrust. If anyone approaches you, you will kill them.






      share|improve this answer









      $endgroup$




      people do know that they exist




      I cannot imagine how the existence could be discovered of a predator whose total design is so conveniently ironclad.




      I imagine a person that suspects they're under threat would deliberately fabricate a fake person and then concentrate on that fake person while traveling through insecure areas. A community would immediately retreat into secure, isolated areas.



      So, forgetting the absolute implausibility of how this could even be true: you are suddenly put on notice that one of these killing machines is in your area. You know, like an Amber Alert. What do you do? Well, your house is safe, so you can just keep the door locked and stay indoors. But you eventually have to get groceries. Before leaving, you pull out your book of Leeroy Jenkins fan-art and study it carefully until you have a really solid picture of him in your head. Then you go outside and hurry to the store, concentrating on Leeroy and how badly you hope to meet him, and pushing all other thoughts out of your head.



      If a shapeshifter becomes aware of you before you notice it, it will shift into your picture of Leeroy Jenkins. If you meet Leeroy Jenkins, you will kill him.



      If you encounter any other non-humans on your route, all of you will stay away from each other out of mutual distrust. If anyone approaches you, you will kill them.







      share|improve this answer












      share|improve this answer



      share|improve this answer










      answered May 19 at 17:23









      TomTom

      49446




      49446











      • $begingroup$
        Wouldn't the shapeshifter just make sure to not appear to be Leeroy, then? Seems the shapeshifter would pick up on the fact that the reason that you're thinking about Leeroy is to kill him, hence they'd not look like him.
        $endgroup$
        – user45266
        May 19 at 22:57
















      • $begingroup$
        Wouldn't the shapeshifter just make sure to not appear to be Leeroy, then? Seems the shapeshifter would pick up on the fact that the reason that you're thinking about Leeroy is to kill him, hence they'd not look like him.
        $endgroup$
        – user45266
        May 19 at 22:57















      $begingroup$
      Wouldn't the shapeshifter just make sure to not appear to be Leeroy, then? Seems the shapeshifter would pick up on the fact that the reason that you're thinking about Leeroy is to kill him, hence they'd not look like him.
      $endgroup$
      – user45266
      May 19 at 22:57




      $begingroup$
      Wouldn't the shapeshifter just make sure to not appear to be Leeroy, then? Seems the shapeshifter would pick up on the fact that the reason that you're thinking about Leeroy is to kill him, hence they'd not look like him.
      $endgroup$
      – user45266
      May 19 at 22:57











      1












      $begingroup$

      Assuming they can't do higher level reasoning by themselves:



      1. Ask someone to curate a list of questions that you have never seen before. These could be combination of math questions like 10x43=? and open ended questions like "how can we solve world hunger?", captcha style questions like "how many oranges are in this photo?" Always keep this list with you, but never look at it.

      2. When you think someone may be a shapeshifter, give them the list. Ask them to choose any 3 questions without telling you and write down the thought process/ answer somewhere. When you review the answers it should be clear if they are capable of independent thought or not (correctness does not matter, just the thought process)

      Not sure if phones/computers are acceptable technology in your world, but it is simple to make an app specifically for this that generates random questions/captchas and can check the answers (no human involved = no chance of reading thoughts).



      It is important that you don't know the problem already, since you might imagine the method to solve it, which they might read and follow. Imagining "the wrong answer" may not work either since your thoughts contain the information that the answer is wrong so they won't choose it (it is impossible to block your own thoughts about it). The only solution is to truly be unaware of the problem itself.






      share|improve this answer








      New contributor



      AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      $endgroup$

















        1












        $begingroup$

        Assuming they can't do higher level reasoning by themselves:



        1. Ask someone to curate a list of questions that you have never seen before. These could be combination of math questions like 10x43=? and open ended questions like "how can we solve world hunger?", captcha style questions like "how many oranges are in this photo?" Always keep this list with you, but never look at it.

        2. When you think someone may be a shapeshifter, give them the list. Ask them to choose any 3 questions without telling you and write down the thought process/ answer somewhere. When you review the answers it should be clear if they are capable of independent thought or not (correctness does not matter, just the thought process)

        Not sure if phones/computers are acceptable technology in your world, but it is simple to make an app specifically for this that generates random questions/captchas and can check the answers (no human involved = no chance of reading thoughts).



        It is important that you don't know the problem already, since you might imagine the method to solve it, which they might read and follow. Imagining "the wrong answer" may not work either since your thoughts contain the information that the answer is wrong so they won't choose it (it is impossible to block your own thoughts about it). The only solution is to truly be unaware of the problem itself.






        share|improve this answer








        New contributor



        AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.





        $endgroup$















          1












          1








          1





          $begingroup$

          Assuming they can't do higher level reasoning by themselves:



          1. Ask someone to curate a list of questions that you have never seen before. These could be combination of math questions like 10x43=? and open ended questions like "how can we solve world hunger?", captcha style questions like "how many oranges are in this photo?" Always keep this list with you, but never look at it.

          2. When you think someone may be a shapeshifter, give them the list. Ask them to choose any 3 questions without telling you and write down the thought process/ answer somewhere. When you review the answers it should be clear if they are capable of independent thought or not (correctness does not matter, just the thought process)

          Not sure if phones/computers are acceptable technology in your world, but it is simple to make an app specifically for this that generates random questions/captchas and can check the answers (no human involved = no chance of reading thoughts).



          It is important that you don't know the problem already, since you might imagine the method to solve it, which they might read and follow. Imagining "the wrong answer" may not work either since your thoughts contain the information that the answer is wrong so they won't choose it (it is impossible to block your own thoughts about it). The only solution is to truly be unaware of the problem itself.






          share|improve this answer








          New contributor



          AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.





          $endgroup$



          Assuming they can't do higher level reasoning by themselves:



          1. Ask someone to curate a list of questions that you have never seen before. These could be combination of math questions like 10x43=? and open ended questions like "how can we solve world hunger?", captcha style questions like "how many oranges are in this photo?" Always keep this list with you, but never look at it.

          2. When you think someone may be a shapeshifter, give them the list. Ask them to choose any 3 questions without telling you and write down the thought process/ answer somewhere. When you review the answers it should be clear if they are capable of independent thought or not (correctness does not matter, just the thought process)

          Not sure if phones/computers are acceptable technology in your world, but it is simple to make an app specifically for this that generates random questions/captchas and can check the answers (no human involved = no chance of reading thoughts).



          It is important that you don't know the problem already, since you might imagine the method to solve it, which they might read and follow. Imagining "the wrong answer" may not work either since your thoughts contain the information that the answer is wrong so they won't choose it (it is impossible to block your own thoughts about it). The only solution is to truly be unaware of the problem itself.







          share|improve this answer








          New contributor



          AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.








          share|improve this answer



          share|improve this answer






          New contributor



          AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.








          answered May 19 at 22:48









          AzureMinotaurAzureMinotaur

          1813




          1813




          New contributor



          AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.




          New contributor




          AzureMinotaur is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.























              1












              $begingroup$

              How smart are they?



              If you ask them a question that you don't know the answer to yet, but can figure out if you choose to, you're golden. Examples:




              "Hey, what's behind me right now?" If they're a dumb shapeshifter (and they're not sentient, so they probably are dumb), they won't really know the answer. Then you turn around and verify their response.



              "Pick a tree branch, and tell me how many leaves are on it"



              "Go over there, and name as many objects as you can in that room"



              Or the classic "How many jellybeans are in the jar"? (tell them to open the jar and count)






              share|improve this answer









              $endgroup$

















                1












                $begingroup$

                How smart are they?



                If you ask them a question that you don't know the answer to yet, but can figure out if you choose to, you're golden. Examples:




                "Hey, what's behind me right now?" If they're a dumb shapeshifter (and they're not sentient, so they probably are dumb), they won't really know the answer. Then you turn around and verify their response.



                "Pick a tree branch, and tell me how many leaves are on it"



                "Go over there, and name as many objects as you can in that room"



                Or the classic "How many jellybeans are in the jar"? (tell them to open the jar and count)






                share|improve this answer









                $endgroup$















                  1












                  1








                  1





                  $begingroup$

                  How smart are they?



                  If you ask them a question that you don't know the answer to yet, but can figure out if you choose to, you're golden. Examples:




                  "Hey, what's behind me right now?" If they're a dumb shapeshifter (and they're not sentient, so they probably are dumb), they won't really know the answer. Then you turn around and verify their response.



                  "Pick a tree branch, and tell me how many leaves are on it"



                  "Go over there, and name as many objects as you can in that room"



                  Or the classic "How many jellybeans are in the jar"? (tell them to open the jar and count)






                  share|improve this answer









                  $endgroup$



                  How smart are they?



                  If you ask them a question that you don't know the answer to yet, but can figure out if you choose to, you're golden. Examples:




                  "Hey, what's behind me right now?" If they're a dumb shapeshifter (and they're not sentient, so they probably are dumb), they won't really know the answer. Then you turn around and verify their response.



                  "Pick a tree branch, and tell me how many leaves are on it"



                  "Go over there, and name as many objects as you can in that room"



                  Or the classic "How many jellybeans are in the jar"? (tell them to open the jar and count)







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered May 19 at 23:08









                  user45266user45266

                  25210




                  25210





















                      -1












                      $begingroup$

                      I'm concerned that you've given them too much power. You need to evaluate if you actually want them to be this powerful. The biggest issue is they can overpower two humans, in addition to their devilishly precise impersonations. It makes one wonder why they impersonate at all if they can be brutes too.



                      If you want them to have a flaw, make them weak, but fatally venomous. Three humans will always win a fight against one, but at great risk. Two probably will. One might, if he's trained.



                      LSerni's answer is clever. Particular question types are easy to verify but difficult to answer. Something like: "Please give me the sum of two primes, then the two numbers". That's pretty easy to verify, but takes intelligence to answer.



                      In a different vein, while traveling alone, the wary are trained to dwell on the impossible. If you're thinking of conversation with your dead grandma, or replaying a movie scene with Luke Skywalker in your head, a shapeshifter is more likely to assume one of those forms. It would be instantly revealed.




                      As an aside, this is similar to Harry Potter's creature the Boggart. You might find some inspiration there.






                      share|improve this answer









                      $endgroup$












                      • $begingroup$
                        Some feedback if you downvote is helpful.
                        $endgroup$
                        – fredsbend
                        May 20 at 0:40















                      -1












                      $begingroup$

                      I'm concerned that you've given them too much power. You need to evaluate if you actually want them to be this powerful. The biggest issue is they can overpower two humans, in addition to their devilishly precise impersonations. It makes one wonder why they impersonate at all if they can be brutes too.



                      If you want them to have a flaw, make them weak, but fatally venomous. Three humans will always win a fight against one, but at great risk. Two probably will. One might, if he's trained.



                      LSerni's answer is clever. Particular question types are easy to verify but difficult to answer. Something like: "Please give me the sum of two primes, then the two numbers". That's pretty easy to verify, but takes intelligence to answer.



                      In a different vein, while traveling alone, the wary are trained to dwell on the impossible. If you're thinking of conversation with your dead grandma, or replaying a movie scene with Luke Skywalker in your head, a shapeshifter is more likely to assume one of those forms. It would be instantly revealed.




                      As an aside, this is similar to Harry Potter's creature the Boggart. You might find some inspiration there.






                      share|improve this answer









                      $endgroup$












                      • $begingroup$
                        Some feedback if you downvote is helpful.
                        $endgroup$
                        – fredsbend
                        May 20 at 0:40













                      -1












                      -1








                      -1





                      $begingroup$

                      I'm concerned that you've given them too much power. You need to evaluate if you actually want them to be this powerful. The biggest issue is they can overpower two humans, in addition to their devilishly precise impersonations. It makes one wonder why they impersonate at all if they can be brutes too.



                      If you want them to have a flaw, make them weak, but fatally venomous. Three humans will always win a fight against one, but at great risk. Two probably will. One might, if he's trained.



                      LSerni's answer is clever. Particular question types are easy to verify but difficult to answer. Something like: "Please give me the sum of two primes, then the two numbers". That's pretty easy to verify, but takes intelligence to answer.



                      In a different vein, while traveling alone, the wary are trained to dwell on the impossible. If you're thinking of conversation with your dead grandma, or replaying a movie scene with Luke Skywalker in your head, a shapeshifter is more likely to assume one of those forms. It would be instantly revealed.




                      As an aside, this is similar to Harry Potter's creature the Boggart. You might find some inspiration there.






                      share|improve this answer









                      $endgroup$



                      I'm concerned that you've given them too much power. You need to evaluate if you actually want them to be this powerful. The biggest issue is they can overpower two humans, in addition to their devilishly precise impersonations. It makes one wonder why they impersonate at all if they can be brutes too.



                      If you want them to have a flaw, make them weak, but fatally venomous. Three humans will always win a fight against one, but at great risk. Two probably will. One might, if he's trained.



                      LSerni's answer is clever. Particular question types are easy to verify but difficult to answer. Something like: "Please give me the sum of two primes, then the two numbers". That's pretty easy to verify, but takes intelligence to answer.



                      In a different vein, while traveling alone, the wary are trained to dwell on the impossible. If you're thinking of conversation with your dead grandma, or replaying a movie scene with Luke Skywalker in your head, a shapeshifter is more likely to assume one of those forms. It would be instantly revealed.




                      As an aside, this is similar to Harry Potter's creature the Boggart. You might find some inspiration there.







                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered May 19 at 19:46









                      fredsbendfredsbend

                      1,630620




                      1,630620











                      • $begingroup$
                        Some feedback if you downvote is helpful.
                        $endgroup$
                        – fredsbend
                        May 20 at 0:40
















                      • $begingroup$
                        Some feedback if you downvote is helpful.
                        $endgroup$
                        – fredsbend
                        May 20 at 0:40















                      $begingroup$
                      Some feedback if you downvote is helpful.
                      $endgroup$
                      – fredsbend
                      May 20 at 0:40




                      $begingroup$
                      Some feedback if you downvote is helpful.
                      $endgroup$
                      – fredsbend
                      May 20 at 0:40



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