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'fragments/reports', 'Symbolic Reasoning' and 'Human Freedom and the Self'
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3 ideas
4. Formal Logic / B. Propositional Logic PL / 1. Propositional Logic
8077
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Stoic propositional logic is like chemistry - how atoms make molecules, not the innards of atoms [Chrysippus, by Devlin]
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4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL
20791
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Chrysippus has five obvious 'indemonstrables' of reasoning [Chrysippus, by Diog. Laertius]
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4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set
21548
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The null class is the class with all the non-existents as its members [MacColl, by Lackey]
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