Combining Texts
Ideas for
'fragments/reports', 'Russell's Metaphysical Logic' and 'The Social Contract (tr Cress)'
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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
6023
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Every proposition is either true or false [Chrysippus, by Cicero]
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5. Theory of Logic / F. Referring in Logic / 2. Descriptions / c. Theory of definite descriptions
21727
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Definite descriptions theory eliminates the King of France, but not the Queen of England [Linsky,B]
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5. Theory of Logic / I. Semantics of Logic / 5. Extensionalism
21719
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Extensionalism means what is true of a function is true of coextensive functions [Linsky,B]
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