Premise: "A man in a gray suit kneels in front of a woman in a white dress."\nHypothesis: "A man is proposing to a woman."\nDo we know that the hypothesis entailed by the premise?
Stream of thoughts:
it is not possible to tell
Kneels in front of a woman does not mean he is proposing.

.

Therefore, the answer is it is not possible to tell