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Ideas for 'fragments/reports', 'Meaning and Necessity' and 'Outlines of Pyrrhonism'

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2 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 / 8. Material Implication

12196

A valid hypothetical syllogism is 'that which does not begin with a truth and end with a falsehood' [Sext.Empiricus]