Q: Given the sentence "The man is skillfully surfing a violent wave in the blue ocean." is it true that "A pro surfer rides a curl."?
A: A man surfing isn't necessarily a pro surfer. A violent wave may not be a curl.
The answer is it is not possible to tell.

QUESTION: Premise: "A man is speaking at a podium in a church."
Hypothesis: "The man was the deacon."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: People other than a deacon can speak at podiums in churches.
The answer is it is not possible to tell.

[QUESTION] Premise: "Young asian boy practices his calligraphy in front of classmates."
Hypothesis: "The young asian boy is at lunch."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
The Asian boy practicing calligraphy in front of classmates does not have to be at lunch.
The answer is no.

Q: Can we conclude from "A mom helps her young child play with a lego train set." that "The child just received this toy train as a birthday gift."?
Options:
- yes
- no
- it is not possible to tell
A: Just because a mom helps her young child play with a train set does not mean the child received it for a birthday gift.
The answer is it is not possible to tell.

QUESTION: If "Two dogs run through a grassy patch that is surrounded by trees." does that mean that "Two puppies run through a grassy patch that is surrounded by trees and bushes."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: Just because the grassy patch is surrounded by trees does not mean that there are any bushes.
The answer is it is not possible to tell.

QUESTION: Test for natural language inference.
Premise: "A man in black is cleaning the roof of a building with a jet of water."
Hypothesis: "Bob was cleaning his roof with a jet of water."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly:
He was cleaning his roof with water because he was cleaning the roof of a building with water.
The answer is yes.