Q: Given the sentence "A young man sitting at a table in front of his computer." is it true that "A man is sitting in front of his computer at his office."?
A: The computer in front of which the man is sitting is not necessarily in his office.
The answer is it is not possible to tell.

Q: Premise: "A man with an apron and hat cooking."
Based on this premise, can we conclude that the hypothesis "The chef is cooking food." is true?
Options:
- yes
- it is not possible to tell
- no
A: A man in an apron and hat is not necessarily a chef.
The answer is it is not possible to tell.

Q: Test for natural language inference.
Premise: "A woman sits next to a bucket of collected clams."
Hypothesis: "A woman has collected these clams herself."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: Just because she's sitting next to the clams doesn't mean she collected them herself.
The answer is it is not possible to tell.

Q: If "A person in black riding a three wheeled bike." does that mean that "A girl in a white dress rides a skateboard."?
Options:
- yes
- it is not possible to tell
- no
A:
It can either be black or white. One cannot ride a bike and a skateboard simultaneously.
The answer is no.