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(B ⊃ ∼T) • (∼B ⊃ N)

Question 179

Multiple Choice

(B ⊃ ∼T) • (∼B ⊃ N) (B ⊃ ∼T) • (∼B ⊃ N) A) CD-valid. B) Invalid. C) DD-valid. D) DA-invalid. E) MP-valid.

A) CD-valid.
B) Invalid.
C) DD-valid.
D) DA-invalid.
E) MP-valid.

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