Student asked: Given the sentence "A martial arts class." is it true that "Most of the class members are watching two spar."?
Teacher's response: Let's think. A karate class is conducting a challenge to win a black belt certification. The answer is it is not possible to tell.

Student asked: Given the sentence "Men and women are standing on a street corner." is it true that "The man and woman are standing."?
Teacher's response: Let's think. There can be one man and one woman amongst men and women. The answer is yes.

Student asked: Given the sentence "A boy takes off his glasses while playing with his toy trains." is it true that "A boy removes his glasses to clean them."?
Teacher's response: Let's think. You don't always have to clean your glasses when you remove them. The answer is it is not possible to tell.

Student asked: Premise: "A man in a black suit."
Hypothesis: "Is standing in front of a group of people in white suits and black dresses."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. A man in a suit stands in front of a well dressed party. The answer is yes.