Premise: "A little boy standing on a big rock with his arms raised looking out over a lake."\nHypothesis: "The boy is in disbelief over how big the lake is."\nDo we know that the hypothesis entailed by the premise?
Step-by-step reasoning:
it is not possible to tell
Just because he's looking out over the lake doesn't mean he's in disbelief over the lake's size.

.

The final answer: it is not possible to tell