Bob is red. Gary is white. Harry is green. If Gary is green and Gary is round then Gary is white. All big things are green. All quiet, red things are not rough. All round, white things are not big. If something is white and not rough then it is big. If something is quiet and green then it is red. If Harry is not big then Harry is quiet. If something is rough and not white then it is quiet.
Gary is white.