Question:
Premise: One firefighter is smiling at another firefighter.

Hypothesis: The firefighters are mad at each other.
Is the hypothesis true?

Answer:
no

Question:
Premise: A man playing the music for a couple.

Hypothesis: an older man plays music
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: Young girls perform a dance number on stage.

Hypothesis: Young girl dancing on stage.
Is the hypothesis true?

Answer:
yes