Student asked: If "A man in a helmet and uniform is smiling." does that mean that "A soldier smiles at the camera."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Not every man in a helmet is a soldier and not all people smiling are doing so for a camera. The answer is it is not possible to tell.

Student asked: Can we conclude from "A surf-skier in a red and black wetsuit goes inverted over a wake." that "A surf-skier who cannot swim just capsized and is waiting to die."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. Although the surf-skier has gone inverted that does not mean they cannot swim and certainly does not mean he is waiting to die. The answer is it is not possible to tell.

Student asked: Premise: "Safety officers standing outside."
Hypothesis: "Two security officers on a break."
Do we know that the hypothesis entailed by the premise?
Teacher's response: Let's think. Not all safety officers are security officers and not all officers standing outside are on break. The answer is it is not possible to tell.

Student asked: Given the sentence "Man with backpack walking on a barricaded street." can we conclude that "The man carries a backpack to the protest."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. Man with backpack walking on a barricaded street does not imply he is at a protest. The answer is it is not possible to tell.