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Ideas for '', 'Lysis' and 'Philosophical Logic'

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5 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]

15407

Formalising arguments favours lots of connectives; proving things favours having very few [Burgess]

11212

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

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / e. or

15424

Asserting a disjunction from one disjunct seems odd, but can be sensible, and needed in maths [Burgess]

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

15409

All occurrences of variables in atomic formulas are free [Burgess]