Given the argument: K ∨ B / K ≡ (D ∨ ∼ B) // K ⊃ D
This argument is:
A) Invalid; fails in 1st line.
B) Invalid; fails in 2nd line.
C) Valid.
D) Invalid; fails in 4th line.
E) Invalid; fails in 3rd line.

Question

Quizplus · Accepted Answer

The Answer of Given the argument: K ∨ B / K ≡ (D ∨ ∼ B) // K ⊃ D
This argument is:
A) Invalid; fails in 1st line.
B) Invalid; fails in 2nd line.
C) Valid.
D) Invalid; fails in 4th line.
E) Invalid; fails in 3rd line.

Given the Argument: K ∨ B / K ≡ (D