Premise: He frowned and said, "We are descending a bit too quickly."

Hypothesis: The pilot gunned the thrusters and tilted the nose to the sky.
Answer: no

Premise: Does Hillary Clinton believe her husband's denials?

Hypothesis: It's not sure whether Clinton believes her husband or not.
Answer: yes

Premise: Lord, he was really tired.

Hypothesis: He was very tired.
Answer: yes

Premise: The current Clean Air Act has been enormously successful, but we can do better.

Hypothesis: The clean air act is good
Answer: it is not possible to tell