Student asked: Premise: "People at a party standing around an illuminated fountain."
Hypothesis: "Nobody at a party."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. Nobody means no people present and there could not be people present if no one is there. The answer is no.


Student asked: Premise: "A black dog stands a few feet away from a white soccer ball on grass."
Hypothesis: "A black dog chases after a soccer ball on a field."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Just because a black dog stands a few feet away from a white soccer ball on grass does not imply that it chases after a soccer ball on a field. The answer is it is not possible to tell.


Student asked: Given the sentence "A man with a pensive look on his face shave off his beard." can we conclude that "A clean-shaven man looks like he regrets shaving off his beard."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A pensive look does not imply that a person regrets shaving. The answer is it is not possible to tell.


Student asked: Can we conclude from "Two boys lifting a dirt bike." that "Two boys are cleaning a dirt bike."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response:
Let's think. Lifting the dirt bike and cleaning the dirt bike are different actions. The answer is no.