From: nicolaas.vroom@pandora.be   
      
   On Saturday, 6 July 2019 00:48:04 UTC+2, Tom Roberts  wrote:   
   > On 7/4/19 2:41 PM, Nicolaas Vroom wrote:   
   > > The easiest explanation is (?) that this is a physical issue which   
   > > depends on the inner workings of the clock.   
   >   
   > But that is woefully incorrect. If the "inner workings of the clock" are   
   > affected by its motion, then the first postulate of SR must be violated.   
   > Because, after all, the laws of physics govern the inner workings of   
   > every clock. To date we have observed no such violation.   
      
   IMO laws are descriptions. If you want to build an airplane from scratch   
   you have to learn by trial and error how to do it better. Slowly you   
   will build up experience and get an idea what the best shapes of wings   
   are, that drag is important, what type of engine you need etc etc. If   
   you are clever you can design a mathematical model of your plane and   
   with simulations you can try to improve performance. But it is not the   
   mathematical model that governs the behaviour of your plane. Laws are   
   the common concepts as a result of experiments.   
      
   I can build two clocks which are physical identical than the mathematics   
   that describe each are identical. Both clocks can also be completely   
   different than the mathematics is different. This difference is a   
   reflection about the physical difference between the two clocks. It is   
   not the mathematics that governs this difference.   
      
   The first step in the understanding of the twin paradox is to agree that   
   in stead of two twins also two identical clocks can be used. The second   
   step is to agree that instead, that one twin stays at home it is one   
   clock will stay at home and that instead, that the other twin makes a   
   round trip it is the other clock. The third step is to agree that after   
   they return at home the moving clock will show less counts than the stay   
   at home clock The fourth step is to agree upon an explanation. In any   
   way this explanation depends on the speed of light and the different   
   speeds of the clocks.   
      
   Nicolaas Vroom.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)