Dave is furry. Dave is rough. Dave is not round. Dave is white. Gary is furry. Gary is green. Gary is not red. Gary is rough. Gary is smart. Gary is white. If Dave is furry and Dave is rough then Dave is not green. If someone is furry and not rough then they are round. If Gary is round and Gary is not green then Gary is not red. All round, green people are white. If Dave is green and Dave is not white then Dave is smart. If Gary is not smart and Gary is not white then Gary is not red.
Gary is not round.