HELP

Fran is doing an indirect proof with four given statements and one conclusion. How many of these statements must be false based on her assumption to contradict the assumption and prove the original conclusion?
Answer
All four
Exactly three
At least one
None of them

Question

HELP

Fran is doing an indirect proof with four given statements and one conclusion.  How many of these statements must be false based on her assumption to contradict the assumption and prove the original conclusion?
Answer
		All four
		Exactly three
		At least one
		None of them

anonymous · Answer

um i misread first time round

anonymous · Answer

at least one i think, but the wording is tricky

anonymous · Answer

if you could give a concrete example that would be useful