A man wearing a bib with a red crab on it is trying to decide if he wants to eat a boiled crab .
It is probable that a man is wearing a red crab bis at his favorite seafood restaurant .
It is probable that a man is wearing a red crab bis at his favorite seafood restaurant .
We doubt that a man is wearing a red crab bis at his favorite seafood restaurant .
A man is wearing a red crab bis at his favorite seafood restaurant .