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Re: What is "spacetime" really?
Modest,
On how you reify time and I don't:
What do you mean by "time dilation?" What "dilates" if the term means more than a clock slowing down under whatever condition?
BTW: I use the phrase "event duration" like a "time exposure photo" of a natural event like the rotating or orbiting earth. Of course it just keeps spinning and orbiting, so the "event" is defined by the "photographer" who decides how to "set" the duration of open lens exposure. If his "event" is one earth rotation, a "day" he will set it for one complete revolution, etc.
(Yes, I also understand the common usage of "event" as anything manifest anywhere... and how relativity designates the relationship between such "events." My usage illustrates what "time" is.... that which "elapses" as things "happen", move etc. So that doesn't make time an entity that can "dilate." The latter is reification.
Michael
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