Premise: "A man holds up an older man as the older man bends down to check out plants."\nHypothesis: "The old man and his son are looking at plants."\nDo we know that the hypothesis entailed by the premise?
Let's be accurate as possible. Think before you answer.
it is not possible to tell
Nothing says that one of the man is the son of the other.

.

Therefore, the answer is it is not possible to tell