Student asked: Premise: "A number of people cross in front of the top of an escalator."
Based on this premise, can we conclude that the hypothesis "The people are at the airport." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Because people are crossing in front of escalator doesn't mean they are at the airport. The answer is it is not possible to tell.


Student asked: Given the sentence "A man without a shirt is working on the roof of a house." is it true that "A shirtless man is hammering shingles on the roof a house."?
Teacher's response: Let's think. Working on the roof of a house does not always mean hammering shingles. The answer is it is not possible to tell.


Student asked: Given the sentence "A guy and a girl are rock climbing with backpacks on." is it true that "A couple pushes each other to their limits."?
Teacher's response: Let's think. Just because a guy and a girl are rock climbing with backpacks on does not mean they pushes each other to their limits. The answer is it is not possible to tell.


Student asked: Given the sentence "A group of individuals performed in front of a seated crowd." is it true that "A group performs in front of a crowd."?
Teacher's response:
Let's think. If a group of individuals performed in front of a seated crowd the it follows that the group performs in front of a crowd. The answer is yes.