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Given the Argument: S ∨ L / L ⊃ ∼

Question 141

Multiple Choice

Given the argument: S ∨ L / L ⊃ ∼ S // S ∨ ∼ L
This argument is:

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

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