On 4/4/2013 2:37 PM, Virgil wrote: > In article > <9dad73f8-1c5e-44b0-a5b1-e76c506e9829@y9g2000vbb.googlegroups.com>, > WM <mueckenh@rz.fh-augsburg.de> wrote: > >> On 4 Apr., 18:13, William Hughes <wpihug...@gmail.com> wrote: >> >>> Induction is not valid for the collection, and you cannot >>> remove it without changing the union. >> >> If you think > > It is that WM does not thing that is causing all the problems here. >