Student asked: Premise: "A man is climbing over a short but sheer rocky cliff."
Hypothesis: "A man is getting ready to descend down the cliff."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A man climbing a short rocky cliff does not imply that he is getting ready to descend down the cliff. The answer is it is not possible to tell.


Student asked: Premise: "A brown dog digging a hole."
Hypothesis: "The dog is digging."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. If the dog is digging a hole it can be said more generally to be digging. The answer is yes.


Student asked: If "A girl is catching a baseball before an opponent touches base." does that mean that "The girl is a good baseball player."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Catching a baseball does not make one a good baseball player. The answer is it is not possible to tell.


Student asked: Given the sentence "A man in mid- air while going down a sand-dune." can we conclude that "The man is skiing in the snow."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. One can ski on snow or a sand-dune but not both. The answer is no.