[ExI] [Extropolis] Chemical Brain Preservation

[Keith Henson]

On Sun, Mar 22, 2026 at 6:56 AM John Clark <johnkclark at gmail.com> wrote:
>
> On Sat, Mar 21, 2026 at 3:06 PM Keith Henson via extropy-chat <extropy-chat at lists.extropy.org> wrote:
>
>> > This issue I have muddled by proposing being able to move to and from
>> the uploaded state.  If you can do this, continuous memory across both
>> states, it is hard to deny that a person exists in the uploaded state.
>
>
> Keith, I'd be interested in hearing your thoughts on Alcor offering chemical brain preservation, at least as an option, given that it would almost certainly preserve information better than current methods.

That's a lot of topic drift.

I simply don't know if chemical preservation would be better or not.
It probably would if brains could not be kept in LN2, but in an
institutional failure of that magnitude, I am not sure it would make
much difference.

We know that cryoprotected tissue can be revived from LN2, the same is
not true for chemical fixation. making LN2 the conservative approach.
Whether that carries over to brain information is likely but not
certain.

My thoughts on getting to the upload era are like Woody Allan's.  If
that does not work, Alcor is the best you can do.

Keith
>
> John K Clark
>
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