Student asked: Premise: "A hiker is climbing up a very steep mountain."
Hypothesis: "A hiker trying to make it to the top of a mountain before his friends do."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A hiker may be hiking alone and is not necessarily trying to get to the top before his friends do. The answer is it is not possible to tell.

Student asked: Given the sentence "A lemonade vendor in a checked shirt sits behind his lemonade stand." is it true that "A vendor sits behind his lemonade stand after a long day."?
Teacher's response: Let's think. A lemonade vendor who sits behind his lemonade stand doesn't necessarily imply after a long day. The answer is it is not possible to tell.

Student asked: Premise: "A man in a blue shirt is building a sand castle at the beach."
Based on this premise, can we conclude that the hypothesis "A man in a blue shirt is building a sand castle at the beach." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A man who is in a blue shirt is building a sand castle while at the beach. The answer is yes.

Student asked: Given the sentence "A group of south african runners pose at the paralympics." is it true that "The runners are being interviewed after the race has finished."?
Teacher's response:
Let's think. Being interviewed is hard to do while posing for a photo. The answer is no.