Question:
Premise: These are modern pirates performing maintenance on their sailboat.

Hypothesis: Pirates are doing maintenance on their boat.
Is the hypothesis true?

Answer:
yes

Question:
Premise: Two old people sitting in chairs on the sidewalk in front of houses.

Hypothesis: The people had dinner an hour ago.
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: A blond girl wearing flannel and a brunette wearing a red shirt, both in jeans, are sitting in a tree with a crowd in the background.

Hypothesis: There are 2 girls in the foreground of this picture.
Is the hypothesis true?

Answer:
yes