On 7/22/2011 4:16 AM, Craig Weinberg wrote:
I have already addressed this point - you can have a living person
with a prosthetic limb but you can't replace a person's brain with a
prosthetic and have it still be that person. The limb only works
because there is enough of the body left to telegraph sensorimotive
action through/around the prosthetic obstacle. On one level, the more
neurons you replace, the more obstacles you introduce. If the living
cells are able to talk to each other well through the prosthetic
network, then functionality should be retained,

I think your theory is incoherent. If the neurons can "talk to each other" thru the "pegs" then all the neurons except the afferent neurons of perception and the efferent neurons of action could be replaced and the person would *behave* exactly the same, including reporting that they felt the same. They would be a philosophical zombie. They would not *exhibit* dementia, catatonia, or any other symptom.


but the experience of
the functionality I would expect to be truncated increasingly. The
living neurons will likely be able to compensate for quite a bit of
this loss, as it is likely massively fault tolerant and redundant, but
if you keep replacing the live cells with pegs, eventually I think
you're going to get decompensation, dementia, and catatonia or some
zombie like state which will likely be recognizable to other human

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