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Originally Posted by Michael M
I totally disagree with your opening statement above.
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Ok, but I totally disagree with your disagreement.
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Time is how long it takes things to happen, but since everything is always happening (moving) everywhere, the "time-keeper" determines what event in particular he is timing, then clicks his stopwatch, so to speak at his selected "beginning" and "end" of the event upon which he is focused.
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You seem to be saying "time is how long time takes", for someone to click a stopwatch. You're defining it in terms of itself.
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Of course,what units of time he uses is arbitrary... usually based on fractions or multiples of our common earth-commensurate cycles, the day or year.
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Using arbitrary units of time lets a time-keeper keep arbitrarily accurate time...?
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Beyond such "time keeping" there is no "time" between "the future" (not yet happened) and "the past" (not still happening.) No "time in between".... always, perpetually, ongoing NOW.
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Local time is specific to a local observer. A local observer has a worldline with a past and future, or there is "no time except now"...?
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Your reference to time starting "when the universe did" is strictly linear thinking and in denial of the possibility of a cyclic universe.
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Unless the universe keeps restarting, I suppose that's true (maybe).
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Further, where do you think all the matter/energy/plasma in the cosmos came from to "start the universe?"
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Matter appeared, when mass did, simple.
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Did it magically appear out of nothingness? Might as well go with religious mythology and believe that "God" pulled the cosmos out of a cosmic Magic Hat!
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The Higgs field might just be the Magic Hat you mention.