Dave is not blue. Dave is furry. Dave is green. Dave is quiet. Dave is round. Dave is smart. Dave is white. Smart things are white. If Dave is green then Dave is furry. All round things are quiet. All round things are furry. White, blue things are round. If something is green then it is quiet. If something is smart and not white then it is quiet. If Dave is not white then Dave is green.
Dave is not quiet.