Question:
Premise: A group of riot police standing around.

Hypothesis: A group of police congregating outside of a protest.
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: A man appears to be reaching for a woman's drink in an office.

Hypothesis: A man is reaching for another person's drink in the office.
Is the hypothesis true?

Answer:
yes

Question:
Premise: A woman sings and plays guitar while young adults mill around in the background.

Hypothesis: there is a woman singing alone
Is the hypothesis true?

Answer:
no