Le 07-juin-05, à 09:20, Russell Standish a écrit :

On Tue, Jun 07, 2005 at 08:29:57AM +0200, Bruno Marchal wrote:

Le 06-juin-05, ? 22:51, Hal Finney a ?crit :

I share most of Paddy Leahy's concerns and areas of confusion with

regard to the "Why Occam" discussion so far. I really don't understand

what it means to explain appearances rather than reality.

Well this I understand. I would even argue that Everett gives an

example by providing an explanation of the appearance of a wave

collapse from the SWE (Schroedinger Wave equation) and this without any

*real*collapse.

And I pretend at least that if comp is correct, then the SWE as an

*appearance* emerges statistically from the "interference" of all

computations as seen from some inner point of view of the mean

universal machine.

But, as I pointed a long time ago Russell is hiding (de facto, not

intentionally I guess :) many assumptions.

It would be nice to expose these "hidden" assumptions. As far as I'm

aware, all my assumptions are exposed and upfront, where at least you

as a reader can decide if you agree, but there is always the

possibility of some that I've missed.

OK. it seems to me that (equation 14 at

http://parallel.hpc.unsw.edu.au/rks/docs/occam/node4.html )

`<<inline: img75.gif>>`

is really presupposing a lot. Where does that come from? It presupposes a space/time geometry, continuity, derivability notion for H, topological notion, etc.

To begin with.

Bruno

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