[QUESTION] Premise: "A man is using a machine on the ground in front of a stone peacock."
Hypothesis: "A younger man is using a machine."
Do we know that the hypothesis entailed by the premise?
We can not infer he is younger or his age since there is no information to date his age.
The answer is it is not possible to tell.

[QUESTION] Premise: "A man skateboarding down a street while two other men look on."
Hypothesis: "A girl rides a skateboard in a skatepark."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A girl can't be described as being a man. A person in a skatepark can't be on the street at the same exact instant.
The answer is no.

[QUESTION] If "A swimming pool with men tossing a ball around." does that mean that "Men playing ball in a pool."?
Options:
- yes
- it is not possible to tell
- no
Swimming pool with men implies that men are in a pool.
The answer is yes.

[QUESTION] Given the sentence "An older man rows a boat." can we conclude that "The man is on a lake."?
Options:
- yes
- it is not possible to tell
- no
One who rows a boat is not necessarily on a lake.
The answer is it is not possible to tell.