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Ideas for 'Brainstorms:Essays on Mind and Psychology', 'Thinking About Logic' and 'Classical Cosmology (frags)'

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4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / c. Derivation rules of PL

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Three traditional names of rules are 'Simplification', 'Addition' and 'Disjunctive Syllogism' [Read]