Please answer the following question by reasoning step-by-step. Given the sentence "A boy and a man cross a river on an elephant." can we conclude that "The pair decide to raft across the river."?
Options:
- yes
- it is not possible to tell
- no. Step-by-step reasoning:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The boy and man crossed the river on an elephant or a raft. So the answer is no.