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'fragments/reports', 'Axiomatic Theories of Truth' and 'Ontological Categories'
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5 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 / E. Nonclassical Logics / 3. Many-Valued Logic
16335
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In Strong Kleene logic a disjunction just needs one disjunct to be true [Halbach]
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16334
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In Weak Kleene logic there are 'gaps', neither true nor false if one component lacks a truth value [Halbach]
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4. Formal Logic / F. Set Theory ST / 1. Set Theory
16309
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Every attempt at formal rigour uses some set theory [Halbach]
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