Student asked: Given the sentence "A woman with a red umbrella is walking through wet city streets." can we conclude that "A woman is walking through the streets without an umbrella."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. If a person is walking through wet city streets that implies they could have and be using their umbrella. The answer is no.

Student asked: Test for natural language inference.
Premise: "A man reading and autographing a book."
Hypothesis: "The man is the book's author."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. A man autographing a book is not always the book's author. The answer is it is not possible to tell.

Student asked: Premise: "A woman in a green sweater is sitting down with a tennis racket about to hit a tennis ball."
Hypothesis: "She is in a wheelchair."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Not all women in green sweater sitting down with a tennis racket about to hit a ball is in a wheelchair. The answer is it is not possible to tell.

Student asked: If "Three men grilling on a front porch." does that mean that "Three men grill burgers at night."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. Grilling does not imply grilling burgers or that it is night. The answer is it is not possible to tell.