Premise: "A man who is wearing a maintenance vest is on a subway or train looking up at the closed doors."\nHypothesis: "A man who is wearing a vest is doing maintenance on a subway."\nDo we know that the hypothesis entailed by the premise?
Step-by-step reasoning process below:
it is not possible to tell
Wearing a maintenance vest on the subway does not mean the man is doing maintenance at that time.

He could be a maintenance man on his way home from work or on his way to work or on his way anywhere.

.

The answer is it is not possible to tell