Anne is blue. Anne is nice. Anne is quiet. Anne is rough. Anne is round. Anne is white. Dave is quiet. Fiona is white. Harry is blue. Harry is nice. Harry is round. Harry is young. All blue people are quiet. If someone is quiet and round then they are white. Rough, white people are blue. All young people are round. Blue people are young. If someone is young then they are quiet. All young, white people are round. All blue, nice people are round.
Dave is not white.