Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: The person is not necessarily a man. The dog is not necessarily the person's best friend.
 The question and answer:
Premise: "A person walking with a dog."
Based on this premise, can we conclude that the hypothesis "A man is walking his best friend." is true?
Options:
- yes
- it is not possible to tell
- no
The answer is it is not possible to tell