Q: Given the sentence "An older man uses a mountain bike on a trail." can we conclude that "A human on a bike."?
Options:
- yes
- it is not possible to tell
- no
A: The older man using a mountain bike implies that the human is on a bike.
The answer is yes.

QUESTION: If "The little girl in the green dress is chasing after a pink ball." does that mean that "A girl chases a ball that she didn't catch."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: Chasing does not imply that the ball she didn't catch the ball.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "Hiker crossing a waterfall."
Hypothesis: "The hiker is heading back to his camp."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Just because a hiker is crossing a waterfall does not mean he is heading back to camp.
The answer is it is not possible to tell.

Q: Premise: "Two people come up a set of stairs from a well-lit area."
Hypothesis: "Two people are walking in a dark alley."
Do we know that the hypothesis entailed by the premise?
A: Two pairs of two people doing different things. Some walking in alleys and other coming up in stairs.
The answer is no.

QUESTION: Premise: "Two men playing volleyball."
Hypothesis: "People play with a ball."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: Men are people and they are playing volleyball so they are playing with a ball.
The answer is yes.

QUESTION: Premise: "A snowboarder slides down the side of an a-frame house buried in snow."
Based on this premise, can we conclude that the hypothesis "A snowboarder goes down a house." is true?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly:
If a snowboarder slides down a house they could also be described as going down the house.
The answer is yes.