Suppose p is a contradiction, q is a tautology, and r is a contingent sentence.

Question

Suppose p is a contradiction, q is a tautology, and r is a contingent sentence. Which of the following are true? A) r, therefore q is an invalid argument B) p,therefore r is a valid argument C) q unless r is a tautology D) r, therefore p is an invalid argument E) p, therefore q is an invalid argument Suppose p is a contradiction, q is a tautology, and r is a contingent sentence. Which of the following are true? A) r, therefore q is an invalid argument B) p,therefore r is a valid argument C) q unless r is a tautology D) r, therefore p is an invalid argument E) p, therefore q is an invalid argument A) r, therefore q is an invalid argument B) p,therefore r is a valid argument C) q unless r is a tautology D) r, therefore p is an invalid argument E) p, therefore q is an invalid argument

Explanation / Answer

B and C

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