Premise: A woman in a purple shirt walking.

Hypothesis: A woman walking to work.
it is not possible to tell

Premise: A young female student studying in a classroom reading a book with her leg rested on another desk.

Hypothesis: A boy is studying in the library.
no

Premise: A tan woman riding her bike next to the beach.

Hypothesis: A female BMX rider performs cool tricks for people heading to the beach.
it is not possible to tell

Premise: people at an outdoor restaurant on the sidewalk

Hypothesis: People waiting to get inside a restaurant.
it is not possible to tell