Student asked: Can we conclude from "A large dog licking its nose." that "A dog is licking its balls."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. A dog cannot simultaneously be licking its balls and its nose. The answer is no.

Student asked: Premise: "A man is rollerblading on a railing."
Hypothesis: "A man is trying to get in a locked car."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. The man is either rollerblading or he is trying to get in a locked car. The answer is no.

Student asked: Can we conclude from "A man on a bike executes a jump as part of a competition while the crowd watches." that "A man is sitting on an exercise bike in the gym."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. A man either executes a jump or is sitting on an exercise bike in the gym. The answer is no.

Student asked: Given the sentence "A man in mid- air while going down a sand-dune." can we conclude that "The man is skiing in the snow."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. One can ski on snow or a sand-dune but not both. The answer is no.