From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=0.4 required=5.0 tests=BAYES_00,FORGED_MUA_MOZILLA autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,b78c363353551702 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Received: by 10.68.220.230 with SMTP id pz6mr12735101pbc.3.1340619435753; Mon, 25 Jun 2012 03:17:15 -0700 (PDT) Path: l9ni17812pbj.0!nntp.google.com!news1.google.com!volia.net!news2.volia.net!feed-A.news.volia.net!news.musoftware.de!wum.musoftware.de!news2.arglkargh.de!noris.net!newsfeed.arcor.de!newsspool1.arcor-online.net!news.arcor.de.POSTED!not-for-mail Date: Mon, 25 Jun 2012 12:17:14 +0200 From: Georg Bauhaus User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: about the new Ada 2012 pre/post conditions References: <1hgo6aks03zy.by4pq4xbjsgf$.dlg@40tude.net> <1jvy3elqtnd1j.1sjbk32evhp1f$.dlg@40tude.net> <1oih2rok18dmt.avbwrres5k12.dlg@40tude.net> <4fe59ea0$0$9502$9b4e6d93@newsspool1.arcor-online.net> <1mkp7fzlk1b0y.1ueinfjn48fcy$.dlg@40tude.net> <4fe72b6b$0$9504$9b4e6d93@newsspool1.arcor-online.net> <1bbvp3ghpjb5s.1go1s1qvcmagh$.dlg@40tude.net> <4fe76fad$0$9507$9b4e6d93@newsspool1.arcor-online.net> <1jt8vhzxfrv2i.eohce4d3rwx1$.dlg@40tude.net> In-Reply-To: <1jt8vhzxfrv2i.eohce4d3rwx1$.dlg@40tude.net> Message-ID: <4fe83aaa$0$6624$9b4e6d93@newsspool2.arcor-online.net> Organization: Arcor NNTP-Posting-Date: 25 Jun 2012 12:17:14 CEST NNTP-Posting-Host: 27928bbf.newsspool2.arcor-online.net X-Trace: DXC=U[=dIc?WbhXAX0F2i>ZLh>_cHTX3j]Fc`QiTam8:_ X-Complaints-To: usenet-abuse@arcor.de Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Date: 2012-06-25T12:17:14+02:00 List-Id: On 25.06.12 10:08, Dmitry A. Kazakov wrote: > On Sun, 24 Jun 2012 21:51:08 +0200, Georg Bauhaus wrote: > >> It is a theory in a different universe of notions. > > http://en.wikipedia.org/wiki/Paradox_of_the_Court Indeed, it helps to remember that logicians and mathematicians have learned that logic and mathematics cannot justify themselves. We have to do something. DbC is something. Better than nothing. So logic and mathematics become tools that happen to exist, tools in the hands of designers whose goals transcend both mathematics and logics into the realm of the physical world of computer based systems. DbC is a best effort thing like every system building effort. > As Littlewood once said, self-referential jokes are fun. Further reading on > the subject of your universe: > > http://www.cut-the-knot.org/selfreference/index.shtml