From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: even elder races get tired of waiting Date: Sun, 21 Mar 2021 17:19:42 +0300 Message-ID: References: <87v99lr26w.fsf@zoho.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37561"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.6 (2021-03-06) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun Mar 21 15:23:32 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lNyzM-0009go-Jy for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 21 Mar 2021 15:23:32 +0100 Original-Received: from localhost ([::1]:41880 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lNyzL-0004WJ-Bq for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 21 Mar 2021 10:23:31 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58608) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lNyyb-0004W9-7J for help-gnu-emacs@gnu.org; Sun, 21 Mar 2021 10:22:45 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:58947) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lNyyZ-0002BH-1u for help-gnu-emacs@gnu.org; Sun, 21 Mar 2021 10:22:44 -0400 Original-Received: from localhost ([::ffff:41.202.241.53]) (AUTH: PLAIN securesender, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 000000000001E0AB.00000000605756AF.000057BD; Sun, 21 Mar 2021 07:22:39 -0700 Mail-Followup-To: help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: <87v99lr26w.fsf@zoho.eu> Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:128475 Archived-At: But again, dates are not numbers: Like 3 apples minus 1 apple is clearly 2. But the difference between the date like 2021-03-23 and 2021-03-21 is then 1 day. Date is not a number, neither a volume of something. I am confused. If we ask how many days are from Monday to Friday, we get into various possible estimates: 1. To count the difference from the begin of Monday to begin of Friday making it full 4 days. 2. To count the difference from the end of Monday to begin of Firday, making it 3 day only 3. To count the difference from the begin of Monday to end of Friday, making it full 5 days. 4. Or to count the difference between the end of Monday to end of Friday making it 4 days. I said I am confused, I have no idea how humans do those calculations and now do not know what is right or wrong. Then when I tell them something like: "The first day of production could be, under all the conditions and requirements, after 40 days upon the registration of the company and your arrival. So, you could imagine that you could start getting first products 24th May 2021." then I can also assume that other humans who read such statements are not going to verify discrepancies. Thus we can safely rely on human error for the results of our functions calculating day differences to be correct in any case. Jean