X-Message-Number: 33472
Date: Sat, 12 Mar 2011 12:38:45 -0700
Subject: Re:Henson reply [Ettinger]
From: Keith Henson <>

On Sat, Mar 12, 2011 at 3:00 AM,  wrote:

> Replying to Keith Henson's message below:
> My point was that an attempted emulation must fail because
> we don't know enough abut the laws of physics to construct a
> realistic algorithm. If you work backwards,
> using an alleged emulation to build a bio brain,
> the result would also be unrealistic.

Bob, I wasn't talking about building a bio brain.

You start with one, infiltrate it with nanomachines/sensors and figure
out what every cell and synapse is doing.

Then you run a simulation in parallel for long enough to be confident
that your simulation is close as you want it.

Next you shut down the biological brain with cold, but keep the
simulation running while mechanically constructing memory in the
biological brain.

After a while, minutes to years, you warm up the biological brain and
synchronize its nerve firing with the simulation.  Then halt the
simulation.  (To avoid laws about one at a time.)

There is no particular reason a person would lose consciousness during
such a seamless uploading and downloading.

Fully reversible uploading of this kind is the only way I would
consider doing it.

(I know, lots of people consider me a reactionary luddite.)

Keith

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