R & A: Demonstrates with a weapon is a way of wielding a weapon.
yes
Q: Given the sentence "A female martial arts student demonstrates with a weapon while others watch." is it true that "A woman wielding a weapon."?

R & A: The kid would not automatically be playing baseball with friends. The kid could be playing baseball somewhere besides the school ground.
it is not possible to tell
Q: Premise: "A kid touching a baseball base and wearing a blue helmet."
Hypothesis: "Kid is playing baseball with his friends in the school ground."
Do we know that the hypothesis entailed by the premise?

R & A: They cannot be on horseback if they are in the pool.
no
Q: Premise: "Two cowboys on horseback lassoing a young calf."
Hypothesis: "Two men are in the pool."
Do we know that the hypothesis entailed by the premise?

R & A: A boy jumping over steps and smiling can't be falling down the steps at the same exact moment.
no
Q:
Premise: "Boy jumping over steps and smiling."
Hypothesis: "Boy is falling down steps."
Do we know that the hypothesis entailed by the premise?