Charlie is big. Charlie is huge. Gary is thin. Gary is short. Dave is quiet. Harry is rough. Harry is dull. If someone is not strong then they are rough. If someone is not bad then they are kind. If someone is quiet then they are nice. If someone is nice and not sad then they are smart. If someone is rough and not strong then they are poor. If someone is thin and short then they are sad. If someone is sad and not nice then they are dull. All kind people are wealthy. 
Dave is smart.