This question suffers from a logical fallacy known as a false dichotomy.
In a false dichotomy (also called a false dilemma, either or, black or white, the missing middle) you are presented with two choices, when in fact there are more than two choices. If one choice is discredited, then the reader is forced to accept the other choice.
"If today is not Tuesday, it must be Wednesday."
"Evolution science is in disarray, so 'creation science' must be right."