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Proof by Natural Deduction Propositional Logic. Use a direct proof to show that the following argument is valid. Please ONLY use Modus Ponens, Modus Tollens,

Proof by Natural Deduction Propositional Logic. Use a direct proof to show that the following argument is valid. Please ONLY use Modus Ponens, Modus Tollens, Hypothetical Syllogism, Disjunctive Syllogism!!

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4 NL rv NV 5 Check Modus Ponens MP Modus Tollens MT Hypothetical Syllogism HS Disjunctive Syllogism DS Add Line X Delete Line Check Proof

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