Student asked: Given the sentence "Two students try to walk a tightrope on a campus quad." is it true that "But one falls off."?
Teacher's response: Let's think. The two students shuffle across a tightrope suspended fifty feet in the air. The answer is it is not possible to tell.


Student asked: Test for natural language inference.
Premise: "A man with a pierced ear is wearing a black shirt."
Hypothesis: "The man's ears are not pierced."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. A man either has pierced ear or his ears are not pierced. The answer is no.


Student asked: Premise: "A white ice cream truck stopped on the side of the road and a man stopped to buy some."
Based on this premise, can we conclude that the hypothesis "A truck selling refreshments stopped and someone bought something." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A truck is description of white ice cream truck and selling ice cream means selling a refreshment item as a man stopped who is someone to buy something. The answer is yes.


Student asked: Premise: "A black dog and a brown dog are playing rough on green grass."
Based on this premise, can we conclude that the hypothesis "The dogs played in the back yard." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. Green grass does not imply only a back yard but could be any grassy area. The answer is it is not possible to tell.