X-Message-Number: 4713
From: Brian Wowk <>
Date: Thu, 3 Aug 1995 16:03:43 -0500
Subject: Reply to Eugen re Uploading

	Eugen Leitl responded to my trivialization of the "rewarming
problem" by suggesting that I was trivializing the whole cryo-injury
repair problem.  Far from it.  The repair problem is extremely
complex, and I do not dismiss it casually.  However, Anders Sandberg
specifically asked how to handle the rewarming problem assuming
*repairs had already been completed* in the deep frozen state.

	I stand by my assertion that rewarming *a repaired brain* is
a trivial problem.  Suitably prepared tissue samples can already 
be recovered from low subzero temperatures.  This is living proof
that low-temperature biological states exist from which recovery
is possible using only simple (but rapid) rewarming.  (Rapid
rewarming of large tissue masses can be achieved by either rf
heating or in-situ exothermic reactions.)  The initial repair
is the difficult  problem, but as I said Anders' question assumed
that this had already been done.

	This leaves the question of whether cryorepair is harder
than scanning and uploading.  I would very much enjoy a debate
of this question, however I am not able to participate in this
debate right now.  I promise to return to the subject when I have more time.

---Brian Wowk


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