Student asked: Given the sentence "People are posing for a picture on the front porch of a house." is it true that "There are no people outside of the white house."?
Teacher's response: Let's think. There are either no people outside the White House or there are people posing for a picture on the front porch. The answer is no.

Student asked: Can we conclude from "A man stands in front of a microphone wearing glasses and looking at a piece of paper." that "A man looking at paper that has a love note on it."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. Not every man stands in front of a microphone wearing glasses and looking at a piece of paper has a love note. The answer is it is not possible to tell.

Student asked: Test for natural language inference.
Premise: "Couple waiting on sidewalk."
Hypothesis: "The couple is about to cross the street."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. Just because Couple waiting on sidewalk does not mean that they are about to cross the street. The answer is it is not possible to tell.

Student asked: If "A man in green carrying a pole with a hook walks down the street." does that mean that "A man carrying a fishing rod to go fishing."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. The pole being carried by the man is not necessarily a fishing rod. The answer is it is not possible to tell.