Re: Interested in thoughts on this excerpt from Martin Rees

From: Bruno Marchal <marchal.domain.name.hidden>
Date: Mon, 7 Aug 2006 16:12:33 +0200

Le 07-août-06, à 15:52, W. C. a écrit :

>
>> From: Bruno Marchal
>> ...
>> Comp says that there is a level of description of yourself such that
>> you
>> survive through an emulation done at that level. But the UD will
>> simulate
>> not only that level but all level belows. So comp makes the following
>> prediction: if you look at yourself or at you neighborhood
>> sufficiently
>> close enough, you can in principle detect, indirectly, (by computing
>> the
>> relative comp histories) the presence of all the sublevel
>> computations.
>
> Are you talking about meditation?


Not at all. I mean it in the operational physical sense. Like observing
your hand with a microscope, or looking closely to the "path" of an
electron.


> I still can't see how "matter" is the result of a sum on an infinity of
> interfering computations".
> Common people can touch and feel the matter (this physical universe).
> They
> don't need this strange process to see it.

I would say that here we are trying to explain those "touch and feel
the matter" without begging the question. My working hypothesis is
comp.



> Your explanation is rather strange.
> As said before, I don't think substitution level exists. So Comp. and
> UDA
> won't work here.

Are you saying that your hypothesis is some negation of comp. Then
there is no problem with my work of course. (Except that many
consequences that I extract from comp remains derivable by much weaker
version of comp).



>
>> So it is enough to observe closely your neighborhood. But of course
>> experimental physicists does exactly that, and the fact that they
>> infer
>> Many-Worlds (many Histories/many computations) from their
>> observations can
>> be seen retrospectively as a confirmation of comp.
>> (This explains that up to now, only people with a good grasp of the
>> conceptual difficulties of the quantum theory can swallow the
>> consequences
>> of comp, more or less).
>
> I think many good physicist won't agree with you.


Of course those physicist would believe in the wave collapse will have
more reason than Everett followers to swallow what I say.
To be sure I don't take a "many or even all physicists think this or
that" as an argument for this or that. Of course it is nice to justify
why such "wrong" belief can rise.



>
>> To be sure "negative interferences" remains quite astonishing (after
>> such
>> an informal reasoning), but then if you take into account the results
>> in
>> computer science and mathematical logic, there are evidence that
>> "negative
>> interference" appears as related to some variant of the incompleteness
>> phenomena. This is somehow counter-intuitive and hard to justify in
>> "french". More in a summary which should come asap. I hope this
>> already
>> helps.
>>
>
> Please provide more explanation.
>
> Thanks.

Asap.


Bruno



http://iridia.ulb.ac.be/~marchal/


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Received on Mon Aug 07 2006 - 10:14:36 PDT

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