Premise: "A boy wearing a bathing suit is doing a handstand while in a canoe."\nHypothesis: "A boy is doing a one-armed handstand on a boat in the river."\nDo we know that the hypothesis entailed by the premise?
Stream of thoughts:
it is not possible to tell
Not all handstands are one-armed.

Not all canoes are in a river.

.

Thus, the answer is it is not possible to tell