Q: Test for natural language inference.
Premise: "Construction workers working at a railroad."
Hypothesis: "The workers are hard at work."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: The workers are working which implies that they are hard at work.
The answer is yes.

QUESTION: Test for natural language inference.
Premise: "A dog's head is in the lap of a person eating off a small plate."
Hypothesis: "There is food shown in the picture."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: The person is eating so that means there must be food.
The answer is yes.

[QUESTION] Premise: "A man who is wearing a maintenance vest is on a subway or train looking up at the closed doors."
Hypothesis: "A man who is wearing a vest is doing maintenance on a subway."
Do we know that the hypothesis entailed by the premise?
Wearing a maintenance vest on the subway does not mean the man is doing maintenance at that time. He could be a maintenance man on his way home from work or on his way to work or on his way anywhere.
The answer is it is not possible to tell.

Q: Test for natural language inference.
Premise: "A small child smiles as a ball flies towards his face."
Hypothesis: "The child is about to catch the ball."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: The child may not catch the ball flying towards his face.
The answer is it is not possible to tell.

QUESTION: Can we conclude from "The black boy in the gray t-shirt is shaking his hands." that "The boy is holding his hands still."?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: Either his hands are shaking or they are still it would be either one or the other.
The answer is no.

QUESTION: Given the sentence "A man with a black and blue backpack hikes down a rock face." can we conclude that "A man hikes in a local park."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly:
Hiking down a rock face does not have to happen in a local park.
The answer is it is not possible to tell.