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Ideas for 'fragments/reports', 'fragments/reports' and 'Tractatus Logico-Philosophicus'

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2 ideas

5. Theory of Logic / B. Logical Consequence / 3. Deductive Consequence |-

18277

If q implies p, that is justified by q and p, not by some 'laws' of inference [Wittgenstein]

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]