Premise: A surfer riding a wave sideways and looking really happy while doing it.

Hypothesis: A surfer riding a wave for a competition.
it is not possible to tell

Premise: A woman in a brown jacket reads from a book while riding on public transit.

Hypothesis: A woman reads on her way to work.
it is not possible to tell

Premise: A young white boy in a uniform is playing roller hockey.

Hypothesis: A little boy is trying to swing higher.
no

Premise: A woman wearing shorts is holding a tan dog while a white dog jumps up in front of her.

Hypothesis: A woman is holding a cat as the dog jumps in front of her.
no