Date: Mar 21, 2013 7:21 AM Author: firstname.lastname@example.org Subject: Re: Matheology § 224 On 21 Mrz., 11:36, YBM <ybm...@nooos.fr.invalid> wrote:
> Le 21.03.2013 07:54, WM a crit :
> > Every not necessary line can be removed. Why do you think there should
> > remain unnecessary lines? And if they are needed, which it the first
> > unnecessary line that must remain?
> Which is the leg which is necessary in order for a dog to have more
> than two legs?
Try to understand set inclusion.