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“Off the top of one's head” or “by heart”


“get into one's head” in a sentenceLaugh your heart out or laugh your head off?What does “beat free” (or “can't beat free”) mean?“you poked my heart…”cloud one's judgement vs. crowd one's judgementWhat's the meaning of “bust head open”Is “to have one's head in the sky” a valid English idiom?Beating one's head against the wall / a brick wallMaking up illogical, unreasonable and unimportant excuses/objections“Performing one's working duties” or “Pulling one's weight”






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








2















I wonder which expression can be used in my following example?




Our teacher was a really smart person. At the second session, he know everyone's name ................





  1. off the top of his head
    from the knowledge you have in your memory:



    • What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.



  2. by heart

    If you know something such as a poem by heart, you have learned it so well that you can remember it without having to read it.



    • Mack knew this passage by heart.










share|improve this question





















  • 1





    You might want to update the title to include the t from heart. (I would also say off by heart instead of just by heart, but I think they're synonyms so could just be my dialect)

    – Smock
    Aug 7 at 9:58












  • @Smock I'm pretty certain they are synonymous

    – Bee
    Aug 7 at 10:03











  • You don't need to qualify that idiomatically. It's sufficient to say "he knew all the student's names", or you could qualify it like, "he remembered everyone's names" or "he could recall every student's names despite having only met us once", etc. As a native English speaker, "by heart" is probably more correct in this case than "top of my head", but I feel like "by heart" does not normally apply in this type of case.

    – David Zemens
    Aug 7 at 17:57

















2















I wonder which expression can be used in my following example?




Our teacher was a really smart person. At the second session, he know everyone's name ................





  1. off the top of his head
    from the knowledge you have in your memory:



    • What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.



  2. by heart

    If you know something such as a poem by heart, you have learned it so well that you can remember it without having to read it.



    • Mack knew this passage by heart.










share|improve this question





















  • 1





    You might want to update the title to include the t from heart. (I would also say off by heart instead of just by heart, but I think they're synonyms so could just be my dialect)

    – Smock
    Aug 7 at 9:58












  • @Smock I'm pretty certain they are synonymous

    – Bee
    Aug 7 at 10:03











  • You don't need to qualify that idiomatically. It's sufficient to say "he knew all the student's names", or you could qualify it like, "he remembered everyone's names" or "he could recall every student's names despite having only met us once", etc. As a native English speaker, "by heart" is probably more correct in this case than "top of my head", but I feel like "by heart" does not normally apply in this type of case.

    – David Zemens
    Aug 7 at 17:57













2












2








2








I wonder which expression can be used in my following example?




Our teacher was a really smart person. At the second session, he know everyone's name ................





  1. off the top of his head
    from the knowledge you have in your memory:



    • What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.



  2. by heart

    If you know something such as a poem by heart, you have learned it so well that you can remember it without having to read it.



    • Mack knew this passage by heart.










share|improve this question
















I wonder which expression can be used in my following example?




Our teacher was a really smart person. At the second session, he know everyone's name ................





  1. off the top of his head
    from the knowledge you have in your memory:



    • What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.



  2. by heart

    If you know something such as a poem by heart, you have learned it so well that you can remember it without having to read it.



    • Mack knew this passage by heart.







idioms expressions phrases






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Aug 7 at 10:02









Bee

2,9585 silver badges22 bronze badges




2,9585 silver badges22 bronze badges










asked Aug 7 at 9:38









A-friendA-friend

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5,63320 gold badges80 silver badges168 bronze badges










  • 1





    You might want to update the title to include the t from heart. (I would also say off by heart instead of just by heart, but I think they're synonyms so could just be my dialect)

    – Smock
    Aug 7 at 9:58












  • @Smock I'm pretty certain they are synonymous

    – Bee
    Aug 7 at 10:03











  • You don't need to qualify that idiomatically. It's sufficient to say "he knew all the student's names", or you could qualify it like, "he remembered everyone's names" or "he could recall every student's names despite having only met us once", etc. As a native English speaker, "by heart" is probably more correct in this case than "top of my head", but I feel like "by heart" does not normally apply in this type of case.

    – David Zemens
    Aug 7 at 17:57












  • 1





    You might want to update the title to include the t from heart. (I would also say off by heart instead of just by heart, but I think they're synonyms so could just be my dialect)

    – Smock
    Aug 7 at 9:58












  • @Smock I'm pretty certain they are synonymous

    – Bee
    Aug 7 at 10:03











  • You don't need to qualify that idiomatically. It's sufficient to say "he knew all the student's names", or you could qualify it like, "he remembered everyone's names" or "he could recall every student's names despite having only met us once", etc. As a native English speaker, "by heart" is probably more correct in this case than "top of my head", but I feel like "by heart" does not normally apply in this type of case.

    – David Zemens
    Aug 7 at 17:57







1




1





You might want to update the title to include the t from heart. (I would also say off by heart instead of just by heart, but I think they're synonyms so could just be my dialect)

– Smock
Aug 7 at 9:58






You might want to update the title to include the t from heart. (I would also say off by heart instead of just by heart, but I think they're synonyms so could just be my dialect)

– Smock
Aug 7 at 9:58














@Smock I'm pretty certain they are synonymous

– Bee
Aug 7 at 10:03





@Smock I'm pretty certain they are synonymous

– Bee
Aug 7 at 10:03













You don't need to qualify that idiomatically. It's sufficient to say "he knew all the student's names", or you could qualify it like, "he remembered everyone's names" or "he could recall every student's names despite having only met us once", etc. As a native English speaker, "by heart" is probably more correct in this case than "top of my head", but I feel like "by heart" does not normally apply in this type of case.

– David Zemens
Aug 7 at 17:57





You don't need to qualify that idiomatically. It's sufficient to say "he knew all the student's names", or you could qualify it like, "he remembered everyone's names" or "he could recall every student's names despite having only met us once", etc. As a native English speaker, "by heart" is probably more correct in this case than "top of my head", but I feel like "by heart" does not normally apply in this type of case.

– David Zemens
Aug 7 at 17:57










2 Answers
2






active

oldest

votes


















4














Generally, off the top of my head is usually used to refer to the first thing that pops into your head.




What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.




This is a valid thing to say but you could also say:




I don't know off the top of my head, but it will come to me.




Meaning that it's not immediately available in your mind, but you do know the answer.



By heart implies something slightly different. To know something by heart it to know it inside out. You'd never hesitate to remember something you know by heart because you know it so well.



These are just my opinions and interpretations of the phrases (since you have already supplied the dictionary definitions).



However, given those slight nuances, I would lean towards using:




Our teacher was a really smart person. At the second session, he know everyone's name by heart.




...since your sentence seems to imply that he had picked them up really easily and knows them inside out, rather than just that that he had them in the forefront of his brain.






share|improve this answer
































    2














    A better (IMO) dictionary definition from Lexico is




    off the top of one's head

    PHRASE



    Without careful thought or investigation.
    I can't tell you off the top of my head




    So in the case of the teacher remembering names, you say




    Our teacher was a really smart person. At the second session, he knew everyone's name by heart.




    The first phrase is used where you don't "know something by heart", but say the first thing that comes to your mind.






    share|improve this answer



























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      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      4














      Generally, off the top of my head is usually used to refer to the first thing that pops into your head.




      What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.




      This is a valid thing to say but you could also say:




      I don't know off the top of my head, but it will come to me.




      Meaning that it's not immediately available in your mind, but you do know the answer.



      By heart implies something slightly different. To know something by heart it to know it inside out. You'd never hesitate to remember something you know by heart because you know it so well.



      These are just my opinions and interpretations of the phrases (since you have already supplied the dictionary definitions).



      However, given those slight nuances, I would lean towards using:




      Our teacher was a really smart person. At the second session, he know everyone's name by heart.




      ...since your sentence seems to imply that he had picked them up really easily and knows them inside out, rather than just that that he had them in the forefront of his brain.






      share|improve this answer





























        4














        Generally, off the top of my head is usually used to refer to the first thing that pops into your head.




        What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.




        This is a valid thing to say but you could also say:




        I don't know off the top of my head, but it will come to me.




        Meaning that it's not immediately available in your mind, but you do know the answer.



        By heart implies something slightly different. To know something by heart it to know it inside out. You'd never hesitate to remember something you know by heart because you know it so well.



        These are just my opinions and interpretations of the phrases (since you have already supplied the dictionary definitions).



        However, given those slight nuances, I would lean towards using:




        Our teacher was a really smart person. At the second session, he know everyone's name by heart.




        ...since your sentence seems to imply that he had picked them up really easily and knows them inside out, rather than just that that he had them in the forefront of his brain.






        share|improve this answer



























          4












          4








          4







          Generally, off the top of my head is usually used to refer to the first thing that pops into your head.




          What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.




          This is a valid thing to say but you could also say:




          I don't know off the top of my head, but it will come to me.




          Meaning that it's not immediately available in your mind, but you do know the answer.



          By heart implies something slightly different. To know something by heart it to know it inside out. You'd never hesitate to remember something you know by heart because you know it so well.



          These are just my opinions and interpretations of the phrases (since you have already supplied the dictionary definitions).



          However, given those slight nuances, I would lean towards using:




          Our teacher was a really smart person. At the second session, he know everyone's name by heart.




          ...since your sentence seems to imply that he had picked them up really easily and knows them inside out, rather than just that that he had them in the forefront of his brain.






          share|improve this answer













          Generally, off the top of my head is usually used to refer to the first thing that pops into your head.




          What's the capital of Mauritania?---I don't know off the top of my head, but I could go and look it up.




          This is a valid thing to say but you could also say:




          I don't know off the top of my head, but it will come to me.




          Meaning that it's not immediately available in your mind, but you do know the answer.



          By heart implies something slightly different. To know something by heart it to know it inside out. You'd never hesitate to remember something you know by heart because you know it so well.



          These are just my opinions and interpretations of the phrases (since you have already supplied the dictionary definitions).



          However, given those slight nuances, I would lean towards using:




          Our teacher was a really smart person. At the second session, he know everyone's name by heart.




          ...since your sentence seems to imply that he had picked them up really easily and knows them inside out, rather than just that that he had them in the forefront of his brain.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Aug 7 at 10:02









          BeeBee

          2,9585 silver badges22 bronze badges




          2,9585 silver badges22 bronze badges


























              2














              A better (IMO) dictionary definition from Lexico is




              off the top of one's head

              PHRASE



              Without careful thought or investigation.
              I can't tell you off the top of my head




              So in the case of the teacher remembering names, you say




              Our teacher was a really smart person. At the second session, he knew everyone's name by heart.




              The first phrase is used where you don't "know something by heart", but say the first thing that comes to your mind.






              share|improve this answer





























                2














                A better (IMO) dictionary definition from Lexico is




                off the top of one's head

                PHRASE



                Without careful thought or investigation.
                I can't tell you off the top of my head




                So in the case of the teacher remembering names, you say




                Our teacher was a really smart person. At the second session, he knew everyone's name by heart.




                The first phrase is used where you don't "know something by heart", but say the first thing that comes to your mind.






                share|improve this answer



























                  2












                  2








                  2







                  A better (IMO) dictionary definition from Lexico is




                  off the top of one's head

                  PHRASE



                  Without careful thought or investigation.
                  I can't tell you off the top of my head




                  So in the case of the teacher remembering names, you say




                  Our teacher was a really smart person. At the second session, he knew everyone's name by heart.




                  The first phrase is used where you don't "know something by heart", but say the first thing that comes to your mind.






                  share|improve this answer













                  A better (IMO) dictionary definition from Lexico is




                  off the top of one's head

                  PHRASE



                  Without careful thought or investigation.
                  I can't tell you off the top of my head




                  So in the case of the teacher remembering names, you say




                  Our teacher was a really smart person. At the second session, he knew everyone's name by heart.




                  The first phrase is used where you don't "know something by heart", but say the first thing that comes to your mind.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Aug 7 at 10:03









                  Weather VaneWeather Vane

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