Combining Texts

Ideas for 'fragments/reports', 'Sameness and Substance Renewed' and 'Knowledge and the Philosophy of Number'

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5 ideas

5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens

8078	Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

6023	Every proposition is either true or false [Chrysippus, by Cicero]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / d. and

23628

The connective 'and' can have an order-sensitive meaning, as 'and then' [Hossack]

5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic

23627

'Before' and 'after' are not two relations, but one relation with two orders [Hossack]

5. Theory of Logic / F. Referring in Logic / 3. Property (λ-) Abstraction

11863

(λx)[Man x] means 'the property x has iff x is a man'. [Wiggins]