Q: Premise: "Bicyclist checking to make sure that his teammate is behind him."
Hypothesis: "The bike rider is drinking a bottle of water."
Do we know that the hypothesis entailed by the premise?
A: You can't be checking the teammate is behind him and be drinking a bottle of water.
The answer is no.

QUESTION: Given the sentence "A man is walking a dog on a leash down the street." is it true that "The woman walked her cat."?

Let's solve it slowly: Two contradictory remarks one of man and woman and second of walking a dog and walking her cat.
The answer is no.

[QUESTION] If "A man and a young boy are on a rock overlooking a lake populated with ducks." does that mean that "There are no humans by the lake."?
Options:
- yes
- it is not possible to tell
- no
There is a man and a boy by the lake therefor the are humans by the lake.
The answer is no.

Q: If "Two men playing baseball." does that mean that "The two guys are wearing baseball uniforms."?
Options:
- yes
- it is not possible to tell
- no
A: Guys are not necessarily wearing baseball uniforms if they are playing baseball.
The answer is it is not possible to tell.

QUESTION: Premise: "Three people stand and face video machines."
Hypothesis: "People in getting ready to play games."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: Just because the people are facing the video machines does not mean they are getting ready to play games.
The answer is it is not possible to tell.

QUESTION: Premise: "A male athlete tackles his head into the ground to protect the ball in play."
Hypothesis: "One player is trying to steal the football from the other team."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly:
The athlete is trying to protect the ball. It is does not mean that he is trying to steal the football.
The answer is it is not possible to tell.