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