Single Idea 9027

[catalogued under 5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth]

Full Idea

A sentence is logically true if all sentences with that grammatical structure are true.

Gist of Idea

A sentence is logically true if all sentences with that grammatical structure are true

Source

Willard Quine (Philosophy of Logic [1970], Ch.7)

Book Reference

Quine,Willard: 'Philosophy of Logic' [Prentice-Hall 1970], p.95


A Reaction

Quine spends some time on the tricky question of deciding which parts of a sentence are grammatical structure ('syncategorematic'), and which parts are what he calls 'lexicon'. I bet there is a Quinean argument which blurs the boundary.