QUESTION: Given the sentence "A young woman jumps as high as she can to prove a point to her friends." is it true that "Sarah jumps as high as she can."?

Let's solve it slowly: The name of the young woman need not necessarily be SARAH.
The answer is it is not possible to tell.


QUESTION: Premise: "Two men fighting in front of an audience."
Hypothesis: "Two men playing soccer."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: They can't fight in front of an audience and play soccer at the same time.
The answer is no.


QUESTION: Premise: "A young blond girl plays an arcade game called the derby."
Hypothesis: "A young girl is really good at the derby."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly:
Just because she plays does not mean she is really good.
The answer is it is not possible to tell.