[QUESTION] Given the sentence "A tall man and a shorter man walking and talking." is it true that "Wearing the same sandals."?
There are a couple of guys strolling along chatting and wearing the same shoes.
The answer is yes.

Q: Premise: "An elderly man sits in a chair in an alleyway."
Hypothesis: "An elderly man prepares a meal for his family."
Do we know that the hypothesis entailed by the premise?
A: A man cannot sit in a chair while he prepares a meal.
The answer is no.

QUESTION: Test for natural language inference.
Premise: "A woman and man are getting silly while sitting at the dining room table."
Hypothesis: "Romantic interlude over sumptuous dinner."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: A woman and man getting silly doesn't necessarily mean they are having a romantic interlude. Sitting at the dining room table doesn't necessarily mean they are having a sumptuous dinner.
The answer is it is not possible to tell.

[QUESTION] Given the sentence "A rollerskater completing a stunt." is it true that "The person is rollerskating."?
A rollerskater is a person while completing a stunt must be rollerskating.
The answer is yes.

Q: If "A surfer about to catch a big wave." does that mean that "The wave was the biggest of the day."?
Options:
- yes
- it is not possible to tell
- no
A: A surfer about to catch a big wave does not necessarily mean that it was the biggest wave of the day.
The answer is it is not possible to tell.

[QUESTION] Premise: "A man in a dark jacket sits at a table with a blue tablecloth smiling at a woman in a green shirt with a black zipper vest."
Hypothesis: "A man is smiling at his son."
Do we know that the hypothesis entailed by the premise?
The man cannot be smiling at a woman at the same time he is smiling at his son.
The answer is no.