Le 06-févr.-07, à 05:25, Stathis Papaioannou a écrit :
> Hal Ruhl writes:
>
> > Hi Bruno:
> >
> > I do not think I fully understand what you are saying.
> >
> > Suppose your model bans white rabbits from its
> > evolving universes - meaning I take it that all
> > successive states are fully logical consequences of their prior
> state.
>
> You mean "physical consequences" or something similar, don't you? I
> don't see anything logically inconsistent about a talking white rabbit
> or even the atoms of my keyboard reassembling themselves into a
> fire-breathing dragon.
I agree with Stathis. Much more, I can prove to you that the sound
lobian machine agrees with Stathis!
It is a key point: there is nothing inconsistent with my seeing and
measuring white rabbits (cf "dreams, videa, ...). Both with QM and/or
comp, we can only hope such "events" are relatively rare.
Now, a naive reading of the UD can give the feeling that with comp
white rabbits are not rare at all, and that is why I insist at some
point that we have to take more fully into account the "objective
constraints" of theoretical computer science and mathematical logic
(some of which are counter-intuitive and even necessarily so).
Hal Ruhl continued:
> I would see this as a selection of one possibility from two.
>
> Lets us say that you are correct about this
> result re your model, this just seems to
> reinforce the idea that it is a sub set in order
> to avoid the information generating selection in the full set.
It *could* be the contrary. In quantum mechanics a case can be given
that it *is* the contrary. It is by taking the full set of (relative
histories) that the quantum phase randomization can eliminate the
quantum aberrant histories (cf Feynman paths).
It works with the QM because of the existence of destructive
interferences, and somehow what the computationalist has to justify is
the (first person plural) appearance of such destructive effects.
Bruno
http://iridia.ulb.ac.be/~marchal/
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Received on Tue Feb 06 2007 - 06:24:25 PST