Student asked: Given the sentence "Man on the roof of a building spraying off the roof." can we conclude that "A man is on the ground floor cleaning."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. The man cannot be on the roof and on the ground floor simultaneously. The answer is no.

Student asked: Premise: "A man tries to take a stick away from a brown dog."
Hypothesis: "The man tried to get the dog to play catch."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. A man who is taking a stick from a dog is not necessarily trying to play catch. The answer is it is not possible to tell.

Student asked: Premise: "An artist at work with all his supplies around him."
Based on this premise, can we conclude that the hypothesis "The artist has supplies." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. An artist with all his supplies around him shows the artist has supplies. The answer is yes.

Student asked: If "A man places his arm around his girlfriend at a conference." does that mean that "The man is planning to propose marriage to his girlfriend."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. A man placing arms around girlfriend does not imply he is planning to propose marriage to her. The answer is it is not possible to tell.