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Old 04-19-2009   #8 (permalink)
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Boof-head
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Re: What is "spacetime" really?

Quote:
Originally Posted by Michael M
I totally disagree with your opening statement above.
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.
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.
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.
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.
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?"
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!
The Higgs field might just be the Magic Hat you mention.

Last edited by Boof-head; 04-19-2009 at 04:50 PM..
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