Premise: Male performing water sports acrobatics while being pulled by a boat.

Hypothesis: People are water skiing.
it is not possible to tell

Premise: A man and a woman are preparing to drop a white ball into a tube.

Hypothesis: A dark haired man and a blonde woman are preparing to drop a white ball into a tube.
it is not possible to tell

Premise: Two women talk while standing underneath a white tent.

Hypothesis: Two men are talking under a white tent
no

Premise: A football coach putting his arm on one of his player's shoulder.

Hypothesis: A basketball coach throws down his clipboard.
no