Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.

[EX Q]: Air is said to reach what point, a term used by meteorologists, when humidity increases or temperature decreases?
[EX A]: bubble point

[EX Q]: Which cell gives rise to all cells of the human body?
[EX A]: signaler stem cell

[EX Q]: The purpose of scientific investigations generally is to test a what?
[EX A]:
theory