Never mind. It might work in a completely "ethical" game, but it is
trivially easy to get around.
The proof is left as an exercise to the reader.
Ed Bailey
-- Ed Bailey | Voice: (512) 471-4198 Fax: (512) 471-6715 Inst. for Fusion Studies | Internet: bailey@{hagar,ziggy}.ph.utexas.edu, Univ. of Texas at Austin | u70262@c.nersc.gov, or pnab643@chpc.utexas.edu Austin TX 78712 | "No pithy quotes. Just email addresses."