", 18 November 2006 (UTC)

By Lattier's manip/demanip theorem, I can show that operations with 0 ""remain meaningless"".
Let x = 2.  0 * x = 0.  Then we ""demanipulate"", x = 0/0.  Hence, 0 is not ""demanipulable"", and thus it remains meaningless. QED.  16:24"