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Ideas for 'fragments/reports', 'Giordano Bruno and Hermetic Tradition' and 'A Mathematical Introduction to Logic (2nd)'

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2 ideas

5. Theory of Logic / B. Logical Consequence / 2. Types of Consequence

9718	Validity is either semantic (what preserves truth), or proof-theoretic (following procedures) [Enderton]

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]