Student asked: Test for natural language inference.
Premise: "A boy on his bike stops and looks back at the cameraman."
Hypothesis: "A boy is facing away from the camera."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. Person facing away from camera cannot looks at cameraman at the same time. The answer is no.


Student asked: Premise: "A racer in full gear and helmet with sponsors logos is riding a red sport motorcycle."
Hypothesis: "A racer is competing in a motorcycle race."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Being in full gear and having sponsors does not necessarily imply that he is competing in a motorcycle race. The answer is it is not possible to tell.


Student asked: Given the sentence "A person sits on a blue scooter by the side of the road." can we conclude that "A person sits on a bench in a park."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. The person cannot sit on the scooter and the bench at the same time. The answer is no.


Student asked: Can we conclude from "A man wearing a white hat is shoveling dirt." that "A man never leaves his house."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response:
Let's think. One cannot never leave the house and be shoveling dirt simultaneously. The answer is no.