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Ideas for '', 'Logic for Philosophy' and 'fragments/reports'

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4 ideas

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

11210

Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt]

11212

The sense of a connective comes from primitively obvious rules of inference [Rumfitt]

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]