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Single Idea 13829

[from 'Carnap and Logical Truth' by Willard Quine, in 5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives ]

Full Idea

Quine said a logical truth is a truth in which only logical constants occur essentially, ...but then a fruitful definition of 'logical constant' is called for.

Gist of Idea

If logical truths essentially depend on logical constants, we had better define the latter

Source

comment on Willard Quine (Carnap and Logical Truth [1954]) by Ian Hacking - What is Logic? §02

Book Reference

'A Philosophical Companion to First-Order Logic', ed/tr. Hughes,R.I.G. [Hackett 1993], p.227