On 2/3/2021 3:49 PM, Alan Grayson wrote:
On Wednesday, February 3, 2021 at 3:39:44 PM UTC-7 Brent wrote:
On 2/3/2021 12:25 PM, Alan Grayson wrote:
On Wednesday, February 3, 2021 at 10:55:13 AM UTC-7
[email protected] wrote:
On Wed, Feb 3, 2021 at 10:05 AM Alan Grayson
<[email protected]> wrote:
/> in GR universes evolve in time, but cannot
instantaneously evolve faster than the SoL./
In 1905 Einstein discovered Special Relativity and said
nothing whatsoever could move faster than light, but by 1915
he had found General Relativity and had to amend that to some
extent, he still insisted that matter or energy or
information cannot move through space faster than light, but
he placed no speed limit on how fast space itself can expand.
/> In the MWI, worlds come into existence fully formed as
it were, that is, replete with copies of observers. You
want to have your cake and eat as well; that is,
appealing to GR, but inconsistently instantaneously
creating fully formed worlds, say like the one we live
in. AG /
MWI doesn't say if a new universe is created instantaneously
*IMO, it surely does! Deutsch makes a right turn in his car, and
immediately another universe is created where a copy of Deutsch
makes a left turn (and numerous other turns!). I see no way
around this violation of GR. AG
*
You need to think of better examples. Something like Deutsch
making a decision is with probability near 1.0 a purely classical
event. If it has some quantum component in its causation it was
probably weeks earlier and in concert with thousands of classical
effects.
Brent
*It's just a thought experiment which makes the necessary point.
Assume Deutsch can take alternate routes with the decision depending
on whether he measures spin UP or DN. Would this work? AG
*
Sure. Or the signal light is controlled by a Geiger counter. It makes
the problem clearer and gets away from questions about consciousness.
Brent
or if the new creation only comes into existence at the speed
of light; it doesn't say because it does it need to, it works
fine either way. MWI Is agnostic about that.
/*> I*f your claim that the net energy of the universe is
zero is associated with the universe as a whole, not for
some part of it, then it must be speculative. No
calculation can be done to establish it. Correct?/
Correct, that can only be established through observation and
experimentation. However if General Relativity is correct and
if empty space does contain residual vacuum energy (both
those things can only be determined through observation and
experimentationbut the evidence is piling up that both are
correct) then the net amount of energy in the universe is
indeed zero.
John K Clark
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