Combining Philosophers

Ideas for Chrysippus, Tertullian and Bernard Linsky

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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 / F. Referring in Logic / 2. Descriptions / b. Definite descriptions

18774

Definite descriptions, unlike proper names, have a logical structure [Linsky,B]

5. Theory of Logic / F. Referring in Logic / 2. Descriptions / c. Theory of definite descriptions

21727

Definite descriptions theory eliminates the King of France, but not the Queen of England [Linsky,B]

5. Theory of Logic / I. Semantics of Logic / 5. Extensionalism

21719

Extensionalism means what is true of a function is true of coextensive functions [Linsky,B]