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(S ⊃ Q) • (∼W ⊃ ∼C)

Question 181

Multiple Choice

(S ⊃ Q) • (∼W ⊃ ∼C) (S ⊃ Q) • (∼W ⊃ ∼C) A) MP-valid. B) Invalid. C) DD-valid. D) CD-valid. E) DD-invalid.


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

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