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Given the Argument: Q ⊃ a / ∼ (A •

Question 170

Multiple Choice

Given the argument: Q ⊃ A / ∼ (A • Q) / A ≡ Q
This argument is:

A) Invalid; fails in 1^st line.
B) Valid.
C) Invalid; fails in 3^rd line.
D) Invalid; fails in 2^nd line.
E) Invalid; fails in 4^th line.

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