Combining Texts
Ideas for
'fragments/reports', 'Theory of Knowledge (2nd ed 1977)' and 'Scientific Essentialism'
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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 / 5. Extensionalism
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Humean conceptions of reality drive the adoption of extensional logic [Ellis]
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