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