Premise: An older man in a suit is being wheeled on his wheelchair through a bookstore by a young man in a sweater.

Hypothesis: The young man is his grandson.
it is not possible to tell

Premise: Water streaming from a young woman in a swimming pool flipping her wet hair backwards.

Hypothesis: The woman was taking part in a sit in on campus
no

Premise: An aspirin added to the water would preserve the flowers.

Hypothesis: the flowers will wilt sooner without adding something
yes

Premise: A man slouched in a chair on a city sidewalk girl watching.

Hypothesis: A man is trying to impress a nearby lady.
it is not possible to tell