Student asked: Given the sentence "Some people standing on a balcony watching a man slide down a slanted rail." is it true that "A man slides up a banister."?
Teacher's response: Let's think. If the man slides down he cannot also be sliding up. The answer is no.


Student asked: Premise: "Two children ride their tricycles on a sidewalk in front of a brightly painted wall."
Hypothesis: "Two children ride their tricycles as a dog follows them."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. In fact that two children ride their tricycles on a sidewalk in front of a brightly painted wall does not imply a dog follows them. The answer is it is not possible to tell.


Student asked: If "A girl is riding a white horse surrounded by green trees." does that mean that "A girl walking while leading a horse."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. She can't ride a white horse and walk while leading a horse at the same time. The answer is no.


Student asked: Given the sentence "Five people are working in a field full of tall dry brush." is it true that "The five people working are men."?
Teacher's response:
Let's think. A group of five people need not consist only of men. The answer is it is not possible to tell.