Premise: "A topless muscular man is playing a stringed instrument outside."\nBased on this premise, can we conclude that the hypothesis "A muscular man is playing a guitar at a park." is true?\nOptions:\n- yes\n- it is not possible to tell\n- no
Think hard. Detailed solution:
it is not possible to tell
Not every stringed instrument is a guitar.

There are many other places to be outside than at a park.

.

Thus, the answer is it is not possible to tell