meekerdb wrote:
On 4/8/2015 4:29 PM, Bruce Kellett wrote:
'Yes doctor' fails because the necessary starting conditions cannot be
realized for physical reasons.
This does not mean that one cannot create a physical computer that
completely models the human brain -- in other words, you could create
a conscious human-like entity. But you would necessarily always create
a /different/ person in this way, not a copy of an existing person.
And not only because of initial conditions, but also because of
interaction with the environment. This can't be negligble, because it
is what makes the computations of the brain classical (or nearly so) and
besides the incidental interactions I think perception is also
necessary. Both of these will cause any replicated brain to instantly
diverge from it's original.
I think this is where Bruno appeals to FPI. But I think it is also why
you say that we need to simulate some or all of the environment as well
as the brain itself if we are to make sense of personal survival.
At the moment, Bruno's dovetailer cannot do this because it picks out
only 'conscious moments' and does not find them only in reproducible
environments. There is no physics there, so Boltzmann brains outnumber
'people' by infinity to one.
Bruce
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