Test for natural language inference.\nPremise: "A surfer glides along the top of a wave on a clear day."\nHypothesis: "A surfer is showing his friend how to surf."\nIs the hypothesis entailed by the premise?\nOptions:\n- yes\n- no\n- it is not possible to tell
Please answer the following question by reasoning step-by-step.
it is not possible to tell
Someone surfing on a clear day is not always showing his friend how to surf.

.

The final answer: it is not possible to tell