Student asked: Premise: "A surfer has just fallen off his surfboard and only his feet are visible above the water."
Hypothesis: "The surfer fell after the wave hit hijm."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. Just because he fell off doesn't mean that he fell off after the wave hit him. The answer is it is not possible to tell.

Student asked: Premise: "A small dog chases a white ball on the grass."
Based on this premise, can we conclude that the hypothesis "A dog jumping for a frisbee." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A dog who chases a white ball would not also be jumping for a frisbee. The answer is no.

Student asked: Premise: "Onlookers watch a white stock car that has smoke coming out of the back."
Hypothesis: "There is a car race going on."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. The car race may not be going on any longer since it appears there may be a crash. The answer is it is not possible to tell.

Student asked: Can we conclude from "A small boy is taking a black toy car from another small child." that "The kids are taking a nap."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response:
Let's think. The boy cannot be taking a black toy car while he is taking a nap. The answer is no.