Combining Texts

Ideas for 'Aristotle and Descartes on Matter', 'Carnap and Logical Truth' and 'Logic for Philosophy'

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3 ideas

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

13829

If logical truths essentially depend on logical constants, we had better define the latter [Hacking on Quine]

5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic

13696

When a variable is 'free' of the quantifier, the result seems incapable of truth or falsity [Sider]

5. Theory of Logic / E. Structures of Logic / 5. Functions in Logic

13700

A 'total' function must always produce an output for a given domain [Sider]