Premise: A snowboarder is performing a stunt in mostly dark.

Hypothesis: A snowboarder is wearing a snowsuit
it is not possible to tell

Premise: Two men in black jumped with arms raised on a tennis court, as the opposing team in white walk towards the net.

Hypothesis: Two men are jumping while two men are walking.
yes

Premise: A few couples sat on the cement landing overlooking the water.

Hypothesis: The couples are watching the ships go by.
it is not possible to tell

Premise: A man with a gray beard is being shaved in front of a lecture hall

Hypothesis: A man reading a book in the library.
no