Creatively image a question and justification for this answer: it is not possible to tell
The question is: Premise: "A man riding a wakeboard on a lake."
Hypothesis: "A man is having lots of fun on the wakeboard."
Do we know that the hypothesis entailed by the premise?
Step-by-step reasoning process: Just because he is riding a wake board does not mean he is having lots of fun and one can have fun without a wake board.