Dave is blue. Dave is furry. Dave is nice. Dave is quiet. Dave is red. Dave is white. Gary is furry. Gary is nice. Gary is quiet. Gary is red. Gary is white. Gary is young. All blue people are white. Nice, quiet people are furry. If someone is white and furry then they are red. All quiet people are nice. White, quiet people are young. If Gary is red then Gary is quiet. If someone is blue and red then they are furry. If someone is blue and quiet then they are nice.
Gary is not white.