premise: A grim looking man with sunglasses pilots a boat. hypothesis: The hungover man drives his boat to work.
neutral: Just because man is grim looking does not mean he is hungover and know way to know he is driving to work.|neutral: People can be grim without being hungover.|neutral: Not all grim looking men with sunglasses are hungover. It's possible that the boat is being piloted elsewhere, not necessarily to work.