Dave is high. Dave is big. Bob is short. Bob is small. Anne is wealthy. Charlie is rough. Charlie is poor. If someone is not huge then they are rough. If someone is not bad then they are nice. If someone is wealthy then they are quiet. If someone is quiet and not dull then they are kind. If someone is rough and not huge then they are sad. If someone is short and small then they are dull. If someone is dull and not quiet then they are poor. All nice people are smart. 
Charlie is smart.