Premise: "Crowd watches as a woman in red shirt goes to break a cinder block with a sledgehammer on a man's chest."
Hypothesis: "Two people are magic performing a trick to entertain the crowd."
Do we know that the hypothesis entailed by the premise? Now, let's be accurate as possible. Some thinking first:
No magic trick is seen; it is a feat of strength. So, the answer is it is not possible to tell.