Premise: "A man in a red shirt and a man in a blue jacket discussing and pointing to a spot on a small potted tree."\nHypothesis: "Two men are pointing at a potential sign of infection on an old oak tree."\nDo we know that the hypothesis entailed by the premise?
Let's be accurate as possible and think first.
it is not possible to tell
The spot is not necessarily a potential sign of infection and the tree is not necessarily old or an oak tree.

.

So, the final answer is it is not possible to tell