On 12/21/2018 5:43 PM, Jason Resch wrote:
On Fri, Dec 21, 2018 at 12:46 PM Brent Meeker <[email protected] <mailto:[email protected]>> wrote:On 12/20/2018 9:09 PM, Jason Resch wrote: > I am not advocating any global reference frame, just mentioning that > for a particular observe, they can define a present that works for > them (in their own reference frame). From their point of view they can > consider themselves at rest (whether they are or are not). They can define it in words, but can they define it physically.What is wrong with using the 3-d hyperspace perpendicular to their direction through spacetime?
That's words. How shall they determine whether event X in distant galaxy Y is simultaneous with their clock reading Z? Is their "direction through spacetime" constant over billions of years?
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