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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,ee78aab9bfd2fe2a X-Google-Attributes: gid103376,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news3.google.com!feeder1-2.proxad.net!proxad.net!feeder2-2.proxad.net!newsfeed.arcor.de!newsspool4.arcor-online.net!news.arcor.de.POSTED!not-for-mail Date: Tue, 16 Dec 2008 13:23:40 +0100 From: Georg Bauhaus User-Agent: Thunderbird 2.0.0.18 (Macintosh/20081105) MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Inspiration for a better calendar package? References: <873agxd6i1.fsf@nbi.dk> <12gqldae49yoe$.1sf2zlz1fthvh.dlg@40tude.net> <6qmg8dFd8kd2U1@mid.individual.net> <1jv16tgrmhor4$.c3a8ugjxu6ed$.dlg@40tude.net> <6qn2kmFdflp2U1@mid.individual.net> <6qottgFdsslcU1@mid.individual.net> <18ckfnjlu93l4$.1fpoya8h7dsm7$.dlg@40tude.net> In-Reply-To: <18ckfnjlu93l4$.1fpoya8h7dsm7$.dlg@40tude.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Message-ID: <49479dcd$0$31876$9b4e6d93@newsspool3.arcor-online.net> Organization: Arcor NNTP-Posting-Date: 16 Dec 2008 13:23:41 CET NNTP-Posting-Host: c53c56e6.newsspool3.arcor-online.net X-Trace: DXC=XFi4_QRRi8L^B]`=U:WelBMcF=Q^Z^V3H4Fo<]lROoRA^YC2XCjHcbI32LghY[]J1E;9OJDO8_SKFNSZ1n^B98iJE5EUZdHI;G@ X-Complaints-To: usenet-abuse@arcor.de Xref: g2news1.google.com comp.lang.ada:3009 Date: 2008-12-16T13:23:41+01:00 List-Id: Dmitry A. Kazakov schrieb: > It can be shown even simpler, printing is an action in real time. You > cannot present any physical action that happens in political time. > > Political fictions are incomputable. (:-)) Political time is decidable, though, because political decisions are not restricted by adherence to the limits of Turing machines and their relatives. Insofar as what matters in business when deciding which time it is, are "political survival", reasonable profit versus insurance cost or loss of reputation, customers who might sue you, ... the parties only need to agree on definitions and procedures regarding the meaning of time stamps. Let the lawers find the rules. Hold the machines during the leap second, if necessary on an as-if basis. (Example: taxation changes on 200Y-MM-DD. Let this day have a leap second. Let a financial transaction take place during that leap second. Will they have to pay the new taxes? Solution: Avoid the question. Just hold it until you can be sure the new time has been enacted. Restart your system, or switch to the backup system that was prepared for the new time.)