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Given the Argument: a ⊃ (B • ∼ C)

Question 37

Multiple Choice

Given the argument: A ⊃ (B • ∼ C) / B ⊃ (C ∨ A) / C ⊃ ∼ A // C ⊃ ∼ B.
This argument is:

A) Invalid; fails in 6th line.
B) Valid.
C) Invalid; fails in 5th line.
D) Invalid; fails in 2nd line.
E) Invalid; fails in 3rd line.

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