[Q] Premise: "A boy wearing blue shorts is doing a back flip in the air under a tree."
Hypothesis: "He is sitting on a couch watching tv."
Do we know that the hypothesis entailed by the premise?
[A] A boy cannot do a back flip while he is sitting.
The answer is no.

[Q] Given the sentence "A man walks down a very narrow alley between buildings." can we conclude that "A man walks through tight quarters."?
Options:
- yes
- it is not possible to tell
- no
[A] Walks down a very narrow alley is the same thing as walks through tight quarters.
The answer is yes.

[Q] Can we conclude from "Blond woman texting while bicyclist in helmet passes in front of her." that "The woman is sleeping while texting."?
Options:
- yes
- no
- it is not possible to tell
[A] The contradiction arises in how a woman sleeping can text as against the woman clearly texting in front of a bicyclist.
The answer is no.