Yes / no, is the following a verifiable fact?
"Matthew McConaughey keeps in shape for his athletic performances."
Chain of thought and solution for this question is:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Matthew McConaughey is an actor, not an athlete.
So, the answer is no.