Stephanie is doing an indirect proof with three given statements and one conclusion. How many of these statements could be false based on her assumption to contradict the statement and prove the original conclusion?

One

Two

One, two or three

Three

Question

Stephanie is doing an indirect proof with three given statements and one conclusion.  How many of these statements could be false based on her assumption to contradict the statement and prove the original conclusion?

 One

 Two

 One, two or three

 Three

anonymous · Answer

Hey, man. This is the one you wanted help on?

anonymous · Answer

Well, to make a proof by contradiction, you assume the negation of the statement you're trying to prove. This statement would be something like:
(A,B, and C) implies D.
The negation of that implication would be:
(A,B, and C) and not D