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