Premise: A group of people are at a rock concert.

Hypothesis: A group of people are swimming,
no

Premise: A man getting thrown from his horse.

Hypothesis: The horse is angry.
it is not possible to tell

Premise: Two men wearing khaki pants are looking at a tree that has just been felled by a saw.

Hypothesis: The men are wearing jeans.
no

Premise: Group of young adults with buckets and soaking wet on street.

Hypothesis: People have a water fight in the middle of the road.
it is not possible to tell