Student asked: Test for natural language inference.
Premise: "A man with graying hair brushing his teeth."
Hypothesis: "An adult male brushes his teeth."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. A man is brushing his teeth instead of his graying hair. The answer is yes.

Student asked: Premise: "Snowboarder going over a fence in snow."
Based on this premise, can we conclude that the hypothesis "The rider is on his board." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. The snowboarder is a rider and a snowboarder does have his board. The answer is yes.

Student asked: Premise: "A race car is smoking on the track."
Hypothesis: "The race car is on fire."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. The smoke could be exhaust from the tail pipe of the car and not because the car is on fire. The answer is it is not possible to tell.

Student asked: Given the sentence "A man and a child are swimming in a pool." can we conclude that "The man is laying on the grass."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. If a man is swimming in a pool he is not laying on the grass. The answer is no.