From: richalivingston@gmail.com   
      
   On Sunday, June 12, 2022 at 2:28:53 PM UTC-5, Chris Jacobs wrote:   
   > ...   
   > Now I know from relativity that if the action is simultaneous in one   
   > frame the effect appears _before_ the cause in other frames.   
   > ...   
   > Chris   
      
   Chris,   
      
   I don't believe that is quite correct.  Events that are on each others light   
   cone are effectively simultaneous (the metric separation is zero), and   
   that is true for all observers.  It is only spatially separated events that   
   have an ambiguous time sequence, and temporally separated events   
   have an ambiguous spatial sequence.   
      
   Rich L.   
      
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