Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: One cannot step across the top of stones and swim in the river simultaneously.
 The question and answer:
Test for natural language inference.
Premise: "Two children step across the top of stones that cut a path across the shallow river."
Hypothesis: "Children are swimming in the river."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
The answer is no