From: mlfasf@comcast.net   
      
   On 6/24/19 1:55 PM, Mike Fontenot wrote:   
   > On 6/23/19 10:37 PM, Sylvia Else wrote:   
   > [...]   
   >   
   > [Moderator's note:  This reply, though quoting only Sylvia Else, seems   
   > to be agreeing with her and disagreeing with the original poster, Rock   
   > Brentwood, who claims that acceleration is fundamental to the twin   
   > paradox.  -P.H.]   
   >   
      
   Maybe this will help:   
      
   In the classic twin "paradox" with an instantaneous turnaround, the   
   apparent paradox arises because the traveling twin incorrectly believes   
   that he can use the time dilation result for his ENTIRE trip.  So he   
   expects her to be the younger when they are reunited.  When the reunion   
   occurs, he is surprised and perplexed that she is the older.  The   
   resolution of this apparent paradox is that during his instantaneous   
   turnaround, she instantaneously gets much older (according to him, not   
   her).  So his acceleration is INDISPENSABLE in the resolution of the   
   apparent paradox.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)