Dave is big. Dave is blue. Dave is quiet. Dave is red. Dave is rough. Dave is round. Dave is white. If Dave is white and Dave is quiet then Dave is big. Quiet people are big. If someone is round then they are quiet. If someone is round and blue then they are quiet. Rough people are blue. All round people are rough. All big, white people are red. All white, round people are big.
Dave is not round.