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