Student asked: Test for natural language inference.
Premise: "A man in a vest is standing behind the man with a motorcyle."
Hypothesis: "Two bikers are standing."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. A man in a vest need not be a biker and him standing behind another man need not mean both are standing. The answer is it is not possible to tell.


Student asked: Can we conclude from "A man with his backpack walks down the street listening to his ipod." that "A man has headphones on."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. If a man is listening to his iPod he must have headphones on. The answer is yes.


Student asked: Premise: "Woman working on a pc in her bathrobe."
Hypothesis: "Woman in a bathrobe typing an email."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. Woman working on a PC is not always typing an email. The answer is it is not possible to tell.


Student asked: Can we conclude from "Young man with a cigarette placing food on a paper plate." that "A young man is dancing in a ballet."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response:
Let's think. A man placing food on a plate can not be dancing in a ballet. The answer is no.