Student asked: Premise: "A guy does a trick in the air."
Hypothesis: "Man performs a headstand."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. One who does a trick does not always do a headstand. The answer is no.

Student asked: Can we conclude from "An elderly lady is talking while some people play instruments." that "The woman is old."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. A woman is old is another way of saying elderly lady. The answer is yes.

Student asked: Premise: "Several people sitting and standing on a grassy area next to the water."
Based on this premise, can we conclude that the hypothesis "People are looking at the water." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Just because next to the water does not mean they are looking at the water. The answer is it is not possible to tell.

Student asked: Given the sentence "Three people looking at something in the snow near a tree." is it true that "The three people are on a roller coaster."?
Teacher's response:
Let's think. The people wouldn't be looking at things in snow near a tree from a roller coaster. The answer is no.