From: poutnik@privacy.net   
      
   Dne 21/09/2017 v 08:30 Luigi Fortunati napsal(a):   
   > Newton claims that gravity is a force, Einstein denies it: for him it   
   > is not a force (it is something else).   
   >   
   > It is obvious that both can not be right: if gravity is a force, Newton   
   > is right and Einstein is wrong, and if it is the reverse Newton is   
   > wrong and Einstein is right.   
   >   
   > It can not be otherwise!   
   > [....]   
      
   It is analogical to the case of the Coriolis force,   
   evaluated in 2 different frames   
      
   Legacy flat-Earth "natural" frame   
   ECI (Earth Centric Inertial) frame, used in GPS   
      
   The Coriolis force is a true and mysterious force in the former,   
   as the frame users are not aware the frame is not inertial.   
      
   The Coriolis force is not a force in the latter.   
      
   --   
   Poutnik ( The Pilgrim, Der Wanderer )   
      
   A wise man guards words he says,   
   as they say about him more,   
   than he says about the subject.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)