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