My paragraph on QM got dense there and tried to cram a lot into a sidenote, which deserves more of an explanation.
I’m not advocating Many Worlds, which was something that DeWitt introduced.
Everett’s Relative State Formulation hinges on the difference between an absolute state (which is quantumly indetermine) and a relative state (which is a determinate measurement record produced by a neural net operating on the physics of the model).
Hugh Everett’s general model doesn’t predict “parallel worlds”. He predicted the measurement records acheived without the wave function collapsing are the same as what you would get if you apply the “special rule” of collapsing the wave function.
On each clock tick, the agent receives an observation (a bitstring/number) from the environment,
This would actually be in direct violation of Everett’s Relative State Formulation, which says there can be no special rules besides the physics engine that produces a measurement. Just as the Copenhagen had a special collapse event for a measurment, here is a special line of code (presumably) to initiate the measurement. In Everett’s views, the measurement must occur as an interaction according to the physics engine.
Now, “physical” is not a word I used in my original post. It is a word Everett used however. A purely physical observer interacting with its object in a purely physical way. I think it is important to understand that no metaphysical implication is made by the use of the word physical, except to say that it must be capable of being described by physics (ie, part of the physics engine).
Thank you for thet pointers.
My paragraph on QM got dense there and tried to cram a lot into a sidenote, which deserves more of an explanation.
I’m not advocating Many Worlds, which was something that DeWitt introduced.
Everett’s Relative State Formulation hinges on the difference between an absolute state (which is quantumly indetermine) and a relative state (which is a determinate measurement record produced by a neural net operating on the physics of the model).
Hugh Everett’s general model doesn’t predict “parallel worlds”. He predicted the measurement records acheived without the wave function collapsing are the same as what you would get if you apply the “special rule” of collapsing the wave function.
So when AIXI says something like this:
This would actually be in direct violation of Everett’s Relative State Formulation, which says there can be no special rules besides the physics engine that produces a measurement. Just as the Copenhagen had a special collapse event for a measurment, here is a special line of code (presumably) to initiate the measurement. In Everett’s views, the measurement must occur as an interaction according to the physics engine.
Now, “physical” is not a word I used in my original post. It is a word Everett used however. A purely physical observer interacting with its object in a purely physical way. I think it is important to understand that no metaphysical implication is made by the use of the word physical, except to say that it must be capable of being described by physics (ie, part of the physics engine).