What would you assume at the beginning of an indirect proof for the following?
Given: The swimming pool is full.
Prove: The temperature is above 90 degrees.
A. The swimming pool is full.
B. The swimming pool is not full.
C. The temperature is above 90 degrees.
D. The temperature is not above 90 degrees.

Question

What would you assume at the beginning of an indirect proof for the following?
Given: The swimming pool is full.
Prove: The temperature is above 90 degrees.
	A.	The swimming pool is full.
	B.	The swimming pool is not full.
	C.	The temperature is above 90 degrees.
	D.	The temperature is not above 90 degrees.

directrix · Answer

The technique of an indirect proof is to assume the hypothesis and then temporarily assume the negation of the conclusion.

So, you want the negation of this:  The temperature is above 90 degrees.

directrix · Answer

Just a word: If you go with the answer of A that was dropped into this thread and then removed, you will have an incorrect answer.