On 2/15/2012 07:07, Stephen P. King wrote:
Interesting. How then do we explain the fact that humans suffer all
kinds of computational errors such as schizophrenia, dismorphia, etc. We
intentionally lie... The list of computationally erroneous behavior of
the brain is almost endless. How does this occur given COMP? But I
digress. Explaining "physical reality" is to explain the properties that
it has as opposed to those that it does not, UDA does not do that. It
even presupposes things that are simply not possible in the physical
world, such as teleportation and computations generating knowledge
without the use of resources. Even a Reversible computer requires memory
to compute and memory is a physical quantity.
The notion of teleportation used in UDA is nothing magical or requiring new physics. The experiments in the UDA can be read as after someone said "yes" to the doctor and became a SIM(Substrate Independent Mind), thus after the substitution, they can know one of their godel numbers/programs (assuming correct observation). This essentially means that said program state can be transmitted and ran/instantiated anywhere you want and with any delay or order or form. A "teleportation" from A to B would merely require the SIM to stop itself in A, have another program transmit it to B(for example through the Internet or some other communication channel) and have someone run it in B, for example on a general purpose Turing-equivalent computer or more likely a special-purpose digital brain (for better performance within our physics) with access to an environment(or more, such as VRs). For all intents and purposes this isn't any different from me writing a program and you downloading it and running it on your own hardware. For UDA 1-5 this works trivially. For UDA 6, it also works, with changes in software. UDA 7 does make a stronger assumption: the sufficiently robust universe, however one doesn't really assume strong physical continuity by now (by 1-6), so I don't see UD even has to be coherently ran all at once and in a continuous manner (for example a running like that in "Permutation City" would work just well, "in the dust"). If you do consider some other 'everything' theories like Tegmark's or Schmidhuber, they also grant you an UD (and I would venture to say that your neutral Existence might also grant you such robust universes). UDA 8 you seem to disagree with, but I don't see what explanatory power could any primitively physical structure grant you: all possible digitalised observers and their continuations already have to be in the UD, thus you cannot use primitive physics for prediction. Thus the only claim that one could make for saving primitive physics would be that it allows for consciousness to manifest (for example by implementing the body). UDA 8 and MGA show that such a claim is specious and unnecessary. You seem to disagree with it, although its not clear to me as to why or how. You seem to claim that physical reality isn't primary (COMP agrees, it emerges from arithmetical/computational truth), although don't agree with the way it emerges in COMP or its nature(?)? Does that mean that you don't think that all possible observers are contained in the UD? To be frank, I'm still rather confused at what point your theory becomes incompatible or predicts different things than COMP (given the standard assumptions used in the UDA).

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