Student asked: Premise: "A machine lifting dirt in front of an apartment building."
Hypothesis: "A machine pouring concrete in front of an apartment building."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. Lifting dirt and pouring concrete are separate functions and cannot be simultaneously performed by one machine. The answer is no.

Student asked: Premise: "A surfer in black gets hit with spray while riding a wave."
Hypothesis: "A surfer enjoys a beach party after a day of surfing."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. The surfer cannot be riding a wave and enjoying a beach party at the same time. The answer is no.

Student asked: Can we conclude from "A musician plays guitar." that "The person is on stage."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. Playing a guitar does not imply the person is on stage. The answer is it is not possible to tell.

Student asked: Can we conclude from "A professor in a black blazer is writer on a chalkboard." that "There is a professor."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response:
Let's think. A professor in a black blazer is the same as a professor. The answer is yes.