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