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Ideas for 'fragments/reports', 'Lectures on the Principles of Political Obligation' and 'Basic Problems of Phenomenology'

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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 / C. Ontology of Logic / 2. Platonism in Logic

15571

The idea of an atemporal realm of validity is as implausible as medieval theology [Heidegger]

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

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