Question

What is an indirect proof?

A. Indirect proof requires you to prove that all but one of a set of possible alternatives is true.

B. Indirect proof requires you to prove that all possible alternatives is false.

C. Indirect proof requires you to prove that all but one of a set of possible alternatives is false.

D. Indirect proof requires you to prove that all possible alternatives is true.

Answer 1

You show that all of the alternatives are false.

Answer 2

I think the correct answer from the choices listed above is option C.   Indirect proof requires you to prove that all but one of a set of possible alternatives is false. Instead of proving something being true, you prove that statement by saying that it cannot be false.