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