A man who is smoking , wearing a yellow safety vest , is doing landscape work .
It is probable that the man has been trying to quit smoking but caves in to a cigarette while working .
It is impossible that the man has been trying to quit smoking but caves in to a cigarette while working .
It is probable that the man has been trying to quit smoking but caves in to a cigarette while working .
The man has been trying to quit smoking but caves in to a cigarette while working .