Dave is young. Dave is rough. Dave is blue. Dave is big. Eric is green. Fred is red. Gary is young. Gary is round. Gary is rough. Gary is nice. If someone is green and nice and rough then they are round. If someone is young and nice then they are big. If someone is big and young and round then they are red. If someone is rough and blue then they are young. If someone is nice and young and red then they are green.
Gary is not green.