Erin is not furry. Erin is green. Gary is blue. Gary is not quiet. Gary is not white. Harry is furry. Harry is rough. If Harry is blue then Harry is green. All furry things are white. White things are blue. If something is rough and not green then it is white. If something is rough and not green then it is white. If something is green and not white then it is blue.
Erin is not white.