Question:
Premise: A man and woman perform a martial arts demonstration with practice katanas in front of an audience in an outside park like environment.

Hypothesis: The katanas are dull.
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: A woman is standing near a public phone outside a bookstore on a city street.

Hypothesis: The woman is getting ready to use the public telephone.
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: A skater is jumping in the air over some stairs at night.

Hypothesis: A skater is outside.
Is the hypothesis true?

Answer:
yes