Combining Texts
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'fragments/reports', 'The Semantic Tradition from Kant to Carnap' and 'A Structural Account of Mathematics'
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4 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 / E. Structures of Logic / 6. Relations in Logic
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The mathematics of relations is entirely covered by ordered pairs [Chihara]
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5. Theory of Logic / K. Features of Logics / 2. Consistency
9552
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Sentences are consistent if they can all be true; for Frege it is that no contradiction can be deduced [Chihara]
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