Leo: Premise: "There are a group of people in a pool and they have scuba gear on."
Hypothesis: "People are learning how to scuba dive."
Do we know that the hypothesis entailed by the premise?
Mei: OK, So, let's think first...
Me:
The people in the pool may already be accomplished scuba divers and have no need of further learning.
Thus, the answer is it is not possible to tell.