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Given the Argument: P ∨ J / ∼(J • ∼

Question 327

Multiple Choice

Given the argument: P ∨ J / ∼(J • ∼ P) // J ≡ ∼ P
This argument is:

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

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