Not all man in a gray jacket pushing a cart is sad.
This justifies what answer for what question? Q & A:
Premise: "A man in a gray jacket is pushing a cart down the road past a bicycle."
Based on this premise, can we conclude that the hypothesis "A sad man in a gray jacket is pushing a cart down the road past a bicycle." is true?
Options:
- yes
- it is not possible to tell
- no
it is not possible to tell