On 21 Mrz., 01:39, fom <fomJ...@nyms.net> wrote: > On 3/20/2013 2:57 PM, WM wrote: > > > On 20 Mrz., 20:40, William Hughes <wpihug...@gmail.com> wrote: > >> On Mar 20, 4:24 pm, WM <mueck...@rz.fh-augsburg.de> wrote: > > >>> I show that every line, that is not the last line, is not needed. > > >> Nope. You show that it is not necessary for its contents. > >> This is not the same as not needed. > > > Agreed: > > I show that every line, that is not the last line, is not needed to > > remain in the list in order to have its contents in the list. > > Agreed? > > Let > > 1, 2, 3 > 6, 7, 8 > 0, 4, 5 > > be a *finite* list > > Then the last line is > > 0, 4, 5 > > The contents of the removed lines > are not in the last line.
Here you have really made a good point. Now try advance a little bit further and find out why I dit *not* apply your example. Hint: There are even two resons.