Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: The people are either inside with their heads down or outside skipping rocks they can not do both at the same time.
 The question and answer:
Premise: "People inside of a building with their heads down with a view outside of bikes."
Based on this premise, can we conclude that the hypothesis "The people are skipping rocks at the beach." is true?
Options:
- yes
- it is not possible to tell
- no
The answer is no