Premise: people at beach looking for things in sand

Hypothesis: Two people are on a sandy beach using a metal detector.
it is not possible to tell

Premise: A few people wandering around an old crumbling part of a city.

Hypothesis: A group of urban explorers are wandering around an old city.
it is not possible to tell

Premise: A dirt bike racer rides number 63 across a dirt path in the woods.

Hypothesis: Dirt bike number 65 sits in a trailer with no rider.
no

Premise: A person wearing a yellow t-shirt, inside a building has on a motorcycle helmet.

Hypothesis: The person is not currently on a motorcycle.
yes