Question:
Premise: A man training a dog to attack his padded left arm.

Hypothesis: A person and an animal are together.
Is the hypothesis true?

Answer:
yes

Question:
Premise: Two children, one of which is holding a stick, are standing on the beach as the sun begins to set.

Hypothesis: Two children are playing on the beach.
Is the hypothesis true?

Answer:
it is not possible to tell

Question:
Premise: A baseball player (not the pitcher) is winding up to throw the ball to another player.

Hypothesis: The umpire is tossing the ball to the pitcher.
Is the hypothesis true?

Answer:
no