# Re: Quantum Time Travel

From: Russell Standish <R.Standish.domain.name.hidden>
Date: Tue, 18 Apr 2000 11:21:06 +1000 (EST)

In order to obtain any measure distribution that differs from the
uniform one (ie contains information), one must have a selection from
the plenitude (or the multiverse if we're talking about that
situation). This selection is made by the observer, and can be
different for different observers.

In a sense, the prior probability "buck" must stop somewhere. The
reason why this is not a problem usually, is because we homo sapiens
share the same universe.

Cheers

>
> Russell Standish <R.Standish.domain.name.hidden> wrote:
> > Jacques Mallah wrote:
> > > Just one problem with that: it doesn't make any
> > > damn sense. Measure is measure. On the other
> > hand if
> > > by "measure relative to themselves" you mean some
> > > measure *ratio*, the important thing to realize is
> > > that measure ratios don't play the role of measure
> > > (foe effective probabilities) unless the
> > denominator is the same fixed constant for all.
> >
> > Provided the same denominator is used for all
> > observations by a particular observer. Different
> > observers may have different denominators
>
> Hell NO, that makes no sense at all if you want
> the measure ratios in question to be proportional to
> (and thus play the role of) measure itself.
>
>
> =====
> - - - - - - -
> Jacques Mallah (jackmallah.domain.name.hidden)
> Physicist / Many Worlder / Devil's Advocate
> "I know what no one else knows" - 'Runaway Train', Soul Asylum
> My URL: http://hammer.prohosting.com/~mathmind/
> > > Furthermore, because of anthropic considerations,
> > rationality of the mind requires a rational physical
> > environment. Hence, if someone exists he must be
> > able to make sense of his surrounding and observe
> > the cause for his own existence. So irrational White
> > Rabbits cannot be observed. [...]
> > Hence any conscious entity must be capable of
> > observing the reason for his
> > own origin, Darwinian or Design
>
> That does not follow. Given the physical laws we
> know, there is no reason a being can't come into
> existance just due to thermodynamic or quantum
> 'random' events. It's just not very common, to say
> the least.
>
> > I repeat, from the third person point of view,
> > everyone does not have the
> > same measure. From the first person point of view,
> > our own measure is unity.
>
> Again with this 'POV' stuff. That's the best you
> can do, huh? I have explained countless times that
> the total measure of some set of observer-moments is
> the sum of the measures of the constituent
> observer-moments. If you want to take some such set
> But the problem comes when you deny the results of
> calculations, based on your ideology, that show that
> (for example) when a measure distribution decays
> exponentially with time, an observation at an early
> time is more effectively probable than one at a later
> time. You insist, with zero justification, that
> because the set you want to designate as 'self'
> contains a long time tail, there is no decrease in
> measure with time. Then you try to cloak that BS with
> mumbo jumbo about '1st vs. 3rd person POVs'.
>
> > > > 3)
> > > I already explained this to you: cardinality
> > isn't the issue. Just take a limit in the right
> way.
> >
> > I know, I know. You just take the limit. As if it
> > was that simple. It's not!
> > Let me give you an example.
> > [snip]
> > Taking the sum of an infinite set depends on the way
> > the element of that set are SEQUENCED!
> >
> > I think that when infinite sets are involved, the
> > concept of limit must be applied very carefully.
>
> No kidding. Any high school kid is supposed to
> know that. What's your point? As I said, take it *in
> the right way*. Don't know the right way? Use
> Occam's razor to guess Nature's preference. In the TM
> UD case, N->inf seems fine.
>
>

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>

----------------------------------------------------------------------------
Dr. Russell Standish Director
High Performance Computing Support Unit, Phone 9385 6967
UNSW SYDNEY 2052 Fax 9385 6965
Australia R.Standish.domain.name.hidden
Room 2075, Red Centre http://parallel.hpc.unsw.edu.au/rks
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Received on Mon Apr 17 2000 - 18:17:05 PDT

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