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Construct a Derivation to Prove That Each of the Following ∨ \lor

Question 21

Essay

Construct a derivation to prove that each of the following propositions is a logical truth of PL using any of the twenty-five rules and conditional proof.
-[(T ⊃ W) • (X ⊃ W)] ⊃ [(T ∨ \lor X) ⊃ W]

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