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Single Idea 14203

[filed under theme 5. Theory of Logic / I. Semantics of Logic / 6. Intensionalism ]

Full Idea

Intension cannot be identified with meaning. ..'Cube' and 'regular polyhedron with six square faces' are logically equivalent predicates. The intension is the same (the function giving the cubes in any possible world) but there is a difference of meaning.

Gist of Idea

Intension is not meaning, as 'cube' and 'square-faced polyhedron' are intensionally the same

Source

Hilary Putnam (Reason, Truth and History [1981], Ch.2)

Book Ref

Putnam,Hilary: 'Reason, Truth and History' [CUP 1998], p.27

The 4 ideas with the same theme [semantic system built on reference to properties]:

9462 Frege is intensionalist about reference, as it is determined by sense; identity of objects comes first [Frege, by Jacquette]
18936 Frege moved from extensional to intensional semantics when he added the idea of 'sense' [Frege, by Sawyer]
14203 Intension is not meaning, as 'cube' and 'square-faced polyhedron' are intensionally the same [Putnam]
9461 Intensionalists say meaning is determined by the possession of properties [Jacquette]