Combining Texts
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'fragments/reports', 'Truth (2nd edn)' and 'Naming and Necessity preface'
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4 ideas
5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
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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 / 1. Logical Form
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Logical form is the aspects of meaning that determine logical entailments [Horwich]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / c. Names as referential
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A man has two names if the historical chains are different - even if they are the same! [Kripke]
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