Student: Premise: "A man is standing behind a podium."\nHypothesis: "Holding up his right arm in front of a lady holding a brochure."\nDo we know that the hypothesis entailed by the premise?.
Teacher: Let's think:

User
A man stifles a woman interrupting his speech by waving a brochure at him. So the final answer is it is not possible to tell.
Assistant