Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: A mother who teaches he boys to fish off of a rocky coast can't simultaneously be making sandwiches for her boys.
 The question and answer:
Premise: "A mother teaches her two young boys to fish off of a rocky coast into very blue water."
Based on this premise, can we conclude that the hypothesis "Mother making sandwich for her boys." is true?
Options:
- yes
- it is not possible to tell
- no
The answer is no