Premise: Little girl holding a karate trophy.

Hypothesis: A girl won a competition.
it is not possible to tell

Premise: A girl rides a unicycle as another rides a scooter next to her.

Hypothesis: Two girls are riding closely outside, one on a unicycle and the other on a scooter.
yes

Premise: A man in an orange shirt standing next to a mannequin wrapped in plastic.

Hypothesis: The man is wearing jean shorts.
it is not possible to tell

Premise: A man in an orange ski suit top with black bottoms has finished performing a trick and is in midair.

Hypothesis: The man has just completed a daredevil act of skiing.
yes