Combining Texts
Ideas for
'fragments/reports', 'Causal and Metaphysical Necessity' and 'Abstract of 'The Fourfold Root''
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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 / I. Semantics of Logic / 3. Logical Truth
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Restrict 'logical truth' to formal logic, rather than including analytic and metaphysical truths [Shoemaker]
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