Combining Texts

Ideas for 'fragments/reports', 'Intro to 2nd ed of Principia Mathematica' and 'Identity and Necessity'

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4 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 / 1. Naming / b. Names as descriptive

9175	We may fix the reference of 'Cicero' by a description, but thereafter the name is rigid [Kripke]

5. Theory of Logic / F. Referring in Logic / 1. Naming / c. Names as referential

9171	The function of names is simply to refer [Kripke]