Premise: Multiple bicyclists wearing different colored shirts and helmets riding around a track.

Hypothesis: A bunch of bicyclist are riding bicycles
yes

Premise: A black dog is standing with his legs spread wide apart on some sand

Hypothesis: A black cat is standing with his legs spread wide apart on some sand
no

Premise: A man in a khaki jacket rides a bike down the street.

Hypothesis: A man is riding a bike down a city street.
it is not possible to tell

Premise: A boy is drinking out of a water fountain shaped like a woman.

Hypothesis: A man is drinking lemonade from a glass.
no