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'fragments/reports', 'Mind, Brain and the Quantum' and 'Remarks on axiomatised set theory'
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3 ideas
5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
8078
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Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]
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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
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Every proposition is either true or false [Chrysippus, by Cicero]
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5. Theory of Logic / J. Model Theory in Logic / 3. Löwenheim-Skolem Theorems
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If a 1st-order proposition is satisfied, it is satisfied in a denumerably infinite domain [Skolem]
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