Question:
Premise: A person on a dirt bike is riding up a hill while people watch on the side.

Hypothesis: A person on a bike.
Is the hypothesis true?

Answer:
yes

Question:
Premise: A man wearing a gray jacket, black shirt, and gray pants is standing by a grill on a deck on a cloudy evening.

Hypothesis: There are big clouds in the sky above.
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: Two young boys are posing with a person dressed as a Power Ranger.

Hypothesis: The boys are sleeping.
Is the hypothesis true?

Answer:
no