On 12 December 2013 11:53, LizR <lizj...@gmail.com> wrote:
> On 12 December 2013 11:25, meekerdb <meeke...@verizon.net> wrote:
>> On 12/11/2013 1:18 PM, LizR wrote:
>> ISTM that "Yes Doctor" sums up comp. If a digital brain made below my
>> substitution level can substitute for my organic one, then I literally have
>> a 50% chance of waking up as the digital version.
>> However if the Subst Level is quantum, no cloning stops it being actually
>> possible.
>> But I don't think "substitution level" is sharply defined.  You brain must
>> be mostly classical (otherwise it would be evolutionarily useless) and so
>> one might well say "yes" to the doctor, while realizing that the immediate
>> state of your brain at the micro-level would not be duplicated.  But this
>> would be no worse than losing the state under anesthetic - which I hope the
>> doctor was going to use anyway.
> It depends what is the important  level for maintaining selfhood. It seems
> reasonable to assume that the self remains the same when the brain is
> duplicated at the quantum level (if one believes the MWI this is happening
> all the time). It's possible that the self is retained during duplication at
> higher levels, but it isn't guaranteed. If my brain was duplicated at, say,
> the cellular level, I might simply die, and someone who thinks she's me
> would be created. (Or then again, that might be happening all the time
> anyway.)
> These are the sort of consideration that make me think that if you say "yes"
> to the Doctor, you've already effectively swallowed all the implcations of
> comp.

The required substitution level cannot be the quantum level since we
know that people can survive with their cognitive faculties intact
even with gross brain changes, such as after a stroke or head injury.

Stathis Papaioannou

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