Bob is white. Bob is young. Dave is white. Dave is young. Fiona is white. Gary is rough. Gary is young. White people are young. If Gary is blue and Gary is not round then Gary is cold. If someone is cold and not smart then they are white. If Fiona is smart and Fiona is not round then Fiona is not white. If someone is rough and blue then they are not round. If someone is young then they are not cold. All rough, round people are cold. Smart people are not blue.
Dave is not young.