Student asked: Premise: "A person dressed in a black shirt and a person dressed in a blue shirt are standing on a mound of sand."
Hypothesis: "The people are standing in a pit of lava."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. One is either standing on a mound of sand or a mound of lava. The answer is no.


Student asked: If "Big brother shows his sister how to play a game in the backyard in the afternoon." does that mean that "The brother plays with the sister."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Just because big brother shows his sister how to play a game does not mean that the brother plays with the sister. The answer is it is not possible to tell.


Student asked: If "A man doing a trick on a bike while in the air." does that mean that "The man is a pro biker."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A man doing a trick on a bike while in the air is not always a pro biker. The answer is it is not possible to tell.


Student asked: Given the sentence "A person laying on the ground below some stairs." can we conclude that "The man is climbing the stairs."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. Laying on the ground and climbing the stairs cannot be done simultaneously. The answer is no.