Question:
Premise: guy on his bike doing tricks

Hypothesis: A male is riding a bike.
Is the hypothesis true?

Answer:
yes

Question:
Premise: Burly warehouse worker giving the victory sign

Hypothesis: An on duty warehouse worker gives a victory sign.
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: They are here to ensure no one crosses the barriers.

Hypothesis: People are waving others through an opening
Is the hypothesis true?

Answer:
no