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Determine Whether the Following Symbolized Argument Is Valid or Invalid

Question 104

Essay

Determine whether the following symbolized argument is valid or invalid. If invalid, provide a counterexample; if valid, construct a deduction.
P v (Q & K)
(P v Q) → [(L → ~X) & (~X → L)]
(L → ~X) → (X & ~Y)
(Y → Z) & (Z → M)
(Q → K) → Z/∴ Z

Correct Answer:

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Invalid.
P = T
Q = T...

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