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Ideas for 'fragments/reports', 'The Conquest of Happiness' and 'Introduction to the Philosophy of Mathematics'

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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

6023	Every proposition is either true or false [Chrysippus, by Cicero]

17924

Excluded middle says P or not-P; bivalence says P is either true or false [Colyvan]