Q: Premise: "A gray-haired man stands next to a police van."
Hypothesis: "A man is being arrested."
Do we know that the hypothesis entailed by the premise?
A: A man stands next to a police van doesn't necessarily mean that is being arrested.
The answer is it is not possible to tell.

QUESTION: Premise: "A bearded man sits at a bus window."
Hypothesis: "The bus window is open."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: Just because A bearded man sits at a bus window does not indicate that The bus window is open.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "A man is walking on the beach and leaving some footprints behind."
Hypothesis: "The man walks along a beach with his hands in his pocket."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
The man may be walking with his hands in his pocket or his hands may be elsewhere.
The answer is it is not possible to tell.

Q: If "Two men holding skateboards walk down a sidewalk." does that mean that "The two men are sitting on a park bench."?
Options:
- yes
- it is not possible to tell
- no
A: Men can not walk down a sidewalk and be sitting on a park bench at the same time.
The answer is no.

QUESTION: Given the sentence "Two men and a small red vehicle outside a large group of parked bicycles." can we conclude that "Two friends are parked next to bikes by the mall."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: Not all men are friends. Men within proximity to a vehicle have not necessarily parked that vehicle. Not everywhere is by the mall.
The answer is it is not possible to tell.

QUESTION: Premise: "Five workers with safety vests working on covering the walls of a covered walkway."
Hypothesis: "The workers are all women."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly:
Just because five workers with safety vests working on covering the walls of a covered walkway doesn't mean that they all are women.
The answer is it is not possible to tell.