What is the difference between the “is” of predication and the “is” of identity?

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What is the difference between these, the "is" of predication and the "is" of identity?



For example, when I say, "my pet is a cat", am I using "is" as an identity or as a predicate?






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What is the difference between these, the "is" of predication and the "is" of identity?



For example, when I say, "my pet is a cat", am I using "is" as an identity or as a predicate?






logic philosophy-of-language philosophy-of-logic language







share|improve this question























  • I made some edits which you may roll back or continue editing. Welcome to this SE!
    – Frank Hubeny
    59 mins ago












up vote
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up vote
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down vote

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What is the difference between these, the "is" of predication and the "is" of identity?



For example, when I say, "my pet is a cat", am I using "is" as an identity or as a predicate?






logic philosophy-of-language philosophy-of-logic language







share|improve this question















What is the difference between these, the "is" of predication and the "is" of identity?



For example, when I say, "my pet is a cat", am I using "is" as an identity or as a predicate?






logic philosophy-of-language philosophy-of-logic language




logic philosophy-of-language philosophy-of-logic language






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edited 59 mins ago









Frank Hubeny

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  • I made some edits which you may roll back or continue editing. Welcome to this SE!
    – Frank Hubeny
    59 mins ago
















  • I made some edits which you may roll back or continue editing. Welcome to this SE!
    – Frank Hubeny
    59 mins ago















I made some edits which you may roll back or continue editing. Welcome to this SE!
– Frank Hubeny
59 mins ago




I made some edits which you may roll back or continue editing. Welcome to this SE!
– Frank Hubeny
59 mins ago










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In "Paris is the capital of France", "is" is used to mean identity.



In "my pet is a cat", "is" is used to mean predication : my pet belongs to the class of cats.



See Ludwig Wittgenstein's Tractatus :




3.323 In everyday language it very frequently happens that the same word has different modes of signification—and so belongs to different symbols—or that two words that have different modes of signification are employed in propositions in what is superficially the same way.



Thus the word ‘is’ figures as the copula, as a sign for identity, and as an expression for existence; ‘exist’ figures as an intransitive verb like ‘go’, and ‘identical’ as an adjective; we speak of something, but also of something’s happening.







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    In "Paris is the capital of France", "is" is used to mean identity.



    In "my pet is a cat", "is" is used to mean predication : my pet belongs to the class of cats.



    See Ludwig Wittgenstein's Tractatus :




    3.323 In everyday language it very frequently happens that the same word has different modes of signification—and so belongs to different symbols—or that two words that have different modes of signification are employed in propositions in what is superficially the same way.



    Thus the word ‘is’ figures as the copula, as a sign for identity, and as an expression for existence; ‘exist’ figures as an intransitive verb like ‘go’, and ‘identical’ as an adjective; we speak of something, but also of something’s happening.







    share|improve this answer


























      up vote
      2
      down vote













      In "Paris is the capital of France", "is" is used to mean identity.



      In "my pet is a cat", "is" is used to mean predication : my pet belongs to the class of cats.



      See Ludwig Wittgenstein's Tractatus :




      3.323 In everyday language it very frequently happens that the same word has different modes of signification—and so belongs to different symbols—or that two words that have different modes of signification are employed in propositions in what is superficially the same way.



      Thus the word ‘is’ figures as the copula, as a sign for identity, and as an expression for existence; ‘exist’ figures as an intransitive verb like ‘go’, and ‘identical’ as an adjective; we speak of something, but also of something’s happening.







      share|improve this answer
























        up vote
        2
        down vote










        up vote
        2
        down vote









        In "Paris is the capital of France", "is" is used to mean identity.



        In "my pet is a cat", "is" is used to mean predication : my pet belongs to the class of cats.



        See Ludwig Wittgenstein's Tractatus :




        3.323 In everyday language it very frequently happens that the same word has different modes of signification—and so belongs to different symbols—or that two words that have different modes of signification are employed in propositions in what is superficially the same way.



        Thus the word ‘is’ figures as the copula, as a sign for identity, and as an expression for existence; ‘exist’ figures as an intransitive verb like ‘go’, and ‘identical’ as an adjective; we speak of something, but also of something’s happening.







        share|improve this answer














        In "Paris is the capital of France", "is" is used to mean identity.



        In "my pet is a cat", "is" is used to mean predication : my pet belongs to the class of cats.



        See Ludwig Wittgenstein's Tractatus :




        3.323 In everyday language it very frequently happens that the same word has different modes of signification—and so belongs to different symbols—or that two words that have different modes of signification are employed in propositions in what is superficially the same way.



        Thus the word ‘is’ figures as the copula, as a sign for identity, and as an expression for existence; ‘exist’ figures as an intransitive verb like ‘go’, and ‘identical’ as an adjective; we speak of something, but also of something’s happening.








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        Mauro ALLEGRANZA

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