[ExI] Another step towards uploading

John Clark johnkclark at gmail.com
Mon Oct 7 14:45:37 UTC 2013

On Mon, Oct 7, 2013 at 1:43 AM, Eugen Leitl <eugen at leitl.org> wrote:

> Everybody keeps talking that fixation/plastination preserves all relevant
> aspects necessary for personal reconstruction. Nobody knows that.

Nobody knows if freezing preserves all relevant aspects necessary for
personal reconstruction either, so a judgement call must be made about
which is the better technology and that's why I think it might be wise if
Alcor at least thought about it. And If freezing is better I don't
understand why neuroscientists use chemical fixation not freezing when they
want to get the most detailed map of a brain that they can.

> Perfusion by diffusion works only on cm^3 scale systems.

OK, but how is that a problem? Just cut the big brain up into slices one
centimeter thick or less; the gap between the slices could be made very
thin indeed, on the order of 30 nanometers. Perhaps I'm wrong but it seems
to me that if the nanotechnology people can't extrapolate and deduce what
must have been inside those very small missing gaps then they're not ready
to resurrect anyone preserved by any method.

  John K Clark
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