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Propositional calculus
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====Truth tables==== {{Main article|Truth table}} A [[truth table]] is a semantic proof method used to determine the truth value of a propositional logic expression in every possible scenario.<ref name="ms41"/> By exhaustively listing the truth values of its constituent atoms, a truth table can show whether a proposition is true, false, tautological, or contradictory.<ref name=":27"/> See {{section link||Semantic proof via truth tables}}.
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