Combining Texts

Ideas for 'fragments/reports', 'The Analytic/Synthetic Distinction' and 'Principia Mathematica'

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3 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 / B. Logical Consequence / 7. Strict Implication

8204	Lewis's 'strict implication' preserved Russell's confusion of 'if...then' with implication [Quine on Russell/Whitehead]

9359	Russell's implication means that random sentences imply one another [Lewis,CI on Russell/Whitehead]