> On 28 Apr 2019, at 21:57, 'Brent Meeker' via Everything List 
> <everything-list@googlegroups.com> wrote:
> 
> 
> 
> On 4/28/2019 8:33 AM, Bruno Marchal wrote:
>> Indexical Digital Mechanism, or simply Mechanism, is the idea that we can 
>> survive with an artificial brain. It is the idea that my consciousness, or 
>> my first-person experience, is invariant for some functional digital 
>> substitution of my brain/body at some level of substitution (neurons, or 
>> perhaps atoms, or quarks and electron, or strings, etc.).
> 
> But notice that already quantum mechanics strongly limits this.?? By Holevo's 
> theorem only half the information defining one's state can be read.??

OK. But that is easily explained (and predicted) by classical digital 
mechanism. My first person is distributed on the infinitely many computations 
coming from a refinement of the computation on any possible details below my 
substitution level. So the “parent matter” available to a digital machine (in 
the arithmetical reality) will appear to be not duplicable. But … ah, I see you 
see the point below.



> I agree that the brain processes instantiating thoughts that define our 
> memories and character are mostly classical and therefore can be read, there 
> will be, statistically, some variation between the original and a copy and 
> between two copies.????

Yes, but they don’t not endangered the personal identity. Like the 
Washington-guy and the Moscow-guy remains the same person as the Helsinki guy, 
despite differentiating a lot very quickly, especially after tasting the cup of 
coffee!




> So it becomes a question of whether this variation is significant...not 
> whether it can be eliminated by going to "some level of substitution”.

I am not sure I understand. By definition, the substitution level take into 
account all what is relevant. If that needs all decimal of the real numbers 
used by a physical description, then Digital Mechanism is wrong, per 
definition, and we are out of the scope of my working hypothesis. 

Bruno





> 
> Brent
> 
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