What was the question for this implicit rationale, and corresponding answer?
People in a building does not imply it is before they go to class.
 The answer: it is not possible to tell
The question: Premise: "Three people with their back turned are standing inside a building."
Based on this premise, can we conclude that the hypothesis "Three people turn their backs inside the building before they go to class." is true?
Options:
- yes
- it is not possible to tell
- no