Anne is white. Bob is quiet. Bob is rough. Erin is furry. Erin is quiet. Erin is white. Harry is green. If someone is nice then they are green. All green people are round. If someone is white and rough then they are quiet. White people are rough. If someone is furry and quiet then they are round. All furry, rough people are quiet. Quiet, rough people are nice. If Harry is quiet and Harry is not round then Harry is not green. If someone is rough and not nice then they are furry.
Bob is not white.