Dave is cold. Dave is green. Dave is quiet. Dave is rough. Dave is not round. Dave is smart. Dave is not white. Smart, round people are not white. If someone is cold then they are quiet. All cold people are quiet. Rough people are smart. If someone is not green then they are smart. All round, rough people are white. If someone is not quiet and not cold then they are rough. If someone is not smart then they are rough.
Dave is not quiet.