Bob is huge. Bob is high. Gary is little. Gary is short. Charlie is smart. Dave is sad. Dave is poor. If someone is not strong then they are sad. If someone is not rough then they are kind. If someone is smart then they are wealthy. If someone is wealthy and not dull then they are clever. If someone is sad and not strong then they are bad. All bad people are thin. If someone is little and short then they are dull. If someone is dull and not wealthy then they are poor. If someone is poor then they are young. If someone is kind then they are nice. All nice people are quiet. All clever people are old. 
Bob is not thin.