Groups > sci.physics.relativity > #380413

Re: Inescapable (symmetric) twins paradox

Newsgroups	sci.physics.relativity
Date	2016-03-29 04:40 -0700
References	<mo5s70$vaf$1@dont-email.me>
Message-ID	<1814ad0d-bcd0-4e58-b114-e80930174260@googlegroups.com> (permalink)
Subject	Re: Inescapable (symmetric) twins paradox
From	Julio Di Egidio <julio@diegidio.name>

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On Wednesday, July 15, 2015 at 3:55:53 PM UTC+1, Julio Di Egidio wrote:
> Dear all,
> 
> "In the context of special relativity, we present a twins experiment that is 
> symmetric between the twins, so that a paradox appears inescapable, in the 
> form of a violation of the principle of causality.  [...]  Bottom line: if 
> special relativity is correct, it must be incomplete."
> 
> <http://seprogrammo.blogspot.co.uk/2015/07/symmetric-twins-paradox.html>

Here is another little "experiment" (requires a recent browser):

<https://jsfiddle.net/juliopdiegidio/aqxfLvs2/embedded/result/>

It is a symmetric setup, only the radial motion is considered.  The first diagram and figures shows the point of view of a C that stays in the mid-point between A and B.  The second diagram and figures shows the point of view of A.

The two points of view (of C and of A) turn out to be incompatible: there is a rendez-vous between all three observes from the point of view of C, but no such rendez-vous from the point of view of A (or, symmetrically, for B).  --  But I might also have made some basic mistake.

Anybody here knows how to fix it ??

Julio

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Re: Inescapable (symmetric) twins paradox Julio Di Egidio <julio@diegidio.name> - 2016-03-29 04:40 -0700
  Re: Inescapable (symmetric) twins paradox "Paul B. Andersen" <relativity@paulba.no> - 2016-03-29 14:54 +0200
    Re: Inescapable (symmetric) twins paradox Julio Di Egidio <julio@diegidio.name> - 2016-04-03 15:13 -0700
      Re: Inescapable (symmetric) twins paradox moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-04-04 01:03 +0000
      Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-03 20:57 -0700
        Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2016-04-03 22:14 -0700
          Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-04 10:53 -0700
          Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-04 11:24 -0700
            Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2016-04-04 23:44 -0700
              Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-05 02:05 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-05 02:51 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-05 02:58 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-05 04:08 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-05 04:25 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-05 04:41 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-05 05:14 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-05 05:46 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-05 06:46 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-04-05 20:54 +0200
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-05 12:45 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-05 23:17 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-06 06:41 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-06 07:56 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-06 09:00 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-04-06 09:54 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-06 11:51 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-06 11:29 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-06 12:01 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-06 14:33 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-09 10:17 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-09 15:45 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-10 12:08 -0700
        Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-03 23:48 -0700
      Re: Inescapable (symmetric) twins paradox "Paul B. Andersen" <relativity@paulba.no> - 2016-04-04 20:22 +0200
  Re: Inescapable (symmetric) twins paradox "Dono," <sa_ge@comcast.net> - 2016-03-29 06:45 -0700
  Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-29 08:18 -0700
    Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-03-29 11:17 -0700
      Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-29 11:54 -0700
        Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-29 21:50 +0200
          Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-29 22:09 +0200
          Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-29 13:11 -0700
            Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-29 22:43 +0200
              Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-29 14:24 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-29 15:58 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-29 23:15 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 00:07 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 00:51 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 01:45 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 02:06 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 02:35 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 03:00 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 03:11 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 03:21 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 03:43 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 03:53 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 04:34 -0700
                Re: Inescapable (symmetric) twins paradox Julio Di Egidio <julio@diegidio.name> - 2016-03-30 04:43 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 05:31 -0700
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 06:08 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 12:21 -0700
                Re: Inescapable (symmetric) twins paradox Odd Bodkin <bodkinodd@gmail.com> - 2016-03-30 14:48 -0500
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 23:39 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-30 22:34 +0200
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 14:36 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 23:17 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-31 00:04 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-31 00:15 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-31 00:30 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 05:29 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 12:13 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-30 22:30 +0200
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 13:35 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-30 22:53 +0200
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 14:39 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-30 23:23 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-31 00:06 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-31 00:23 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-31 00:42 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-31 00:56 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-31 11:11 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-31 22:10 +0200
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-31 13:50 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-31 23:03 +0200
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-31 15:01 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-31 23:09 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-01 00:11 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-01 00:34 -0700
                Re: Inescapable (symmetric) twins paradox moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-04-01 14:53 +0000
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-04-01 17:55 +0200
                Re: Inescapable (symmetric) twins paradox moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-04-01 18:44 +0000
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-04-01 21:02 +0200
                Re: Inescapable (symmetric) twins paradox moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-04-04 01:10 +0000
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-01 10:30 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-01 10:38 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-01 13:36 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-04-04 11:41 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-04 15:02 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-04 23:01 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-05 00:27 -0700
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-04-05 00:52 -0700
                Re: Inescapable (symmetric) twins paradox Gary Harnagel <hitlong@yahoo.com> - 2016-04-01 15:37 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-04-01 21:10 +0200
                Re: Inescapable (symmetric) twins paradox Bimpy <pimp@pimp.com> - 2016-04-01 19:15 +0000
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-04-01 13:38 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-04-02 09:05 +0200
                Re: Inescapable (symmetric) twins paradox moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-03-31 14:42 +0000
                Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 02:45 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 12:10 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2016-03-30 12:07 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-03-30 22:26 +0200
                Re: Inescapable (symmetric) twins paradox mlwozniak@wp.pl - 2016-03-29 23:25 -0700
        Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-03-30 10:30 -0700
          Re: Inescapable (symmetric) twins paradox David Waite <waitedavid1618@yahoo.com> - 2016-03-30 10:48 -0700
            Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2016-03-31 07:20 -0700

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