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'fragments/reports', 'Philosophical Logic: Intro to Advanced Topics' and 'Quodlibeta'
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2 ideas
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 / D. Assumptions for Logic / 4. Identity in Logic
13851
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Unlike most other signs, = cannot be eliminated [Engelbretsen/Sayward]
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