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A proof that p → q is true based on the fact that q is true, such proofs are known as ___________

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A proof that p → q is true based on the fact that q is true, such proofs are known as ___________

(a) Direct proof

(b) Contrapositive proofs

(c) Trivial proof

(d) Proof by cases

I have been asked this question in class test.

This interesting question is from Types of Proofs in chapter The Foundation: Logics and Proofs of Discrete Mathematics

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Best answer
Correct option is (c) Trivial proof

The best explanation: Definition of trivial proof.

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