Q: Given the sentence "A boy in a white shirt and green helmet is riding a skateboard down some steps." is it true that "The boy is skateboarding in an area where skateboarding is prohibited."?
A: The skateboarding boy is breaking the law; what he is doing is prohibited in that place.
The answer is it is not possible to tell.

QUESTION: Premise: "A large group of people are congregated outside."
Based on this premise, can we conclude that the hypothesis "There is a large group of people." is true?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: There has to be a large group of people in order to be congregated.
The answer is yes.

[QUESTION] Test for natural language inference.
Premise: "A girl is taking a picture of another girl in a park."
Hypothesis: "A girl is taking a picture of an older girl in a large park."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
No mention that the girl is older or size of the park.
The answer is it is not possible to tell.

Q: Premise: "Two dogs are wrestling in the grass."
Hypothesis: "Pets sitting on command."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: The pets cannot be simultaneously wrestling in the grass and sitting on command.
The answer is no.

QUESTION: Test for natural language inference.
Premise: "A woman is dressed as batgirl on a busy street."
Hypothesis: "A person outside is dressed as a superhero."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: Dressed as a batgirl means you are dressed as a superhero.
The answer is yes.

QUESTION: Premise: "A man is repelling down a cliff next to a lake."
Based on this premise, can we conclude that the hypothesis "The man is sleeping at home." is true?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly:
A man can not be repelling down a cliff and sleeping at home at the same time.
The answer is no.