<table><tr><th>From:</th><th>Joscha Bach</th></tr><tr><td>Sent:</td><td>Wednesday, December 31, 2014 12:11 PM</td></tr><tr><td>To:</td><td>Jeffrey Epstein</td></tr><tr><td>Subject:</td><td>Re: Computation and Consciousness</td></tr></table>

At what level do you look for feedback?

As far as I know: Within the nervous system, most of the processing =eems to be top-down (and indeed, I emphasize mostly bottom up during =he lecture). Between the computational machine of the mind and the =omputational machine of the universe, there is no feedback, but purely =or formal reasons. That is because all the feedback is taken care of on =he physical level, i.e. it is not the mind that "writes" into the =niverse, but the brain. (Similar to personal computers: strictly =peaking, software does not change states of the physical machinery, but =he physical machinery itself changes its states; software exists on a =ifferent level of description that is supervenient on, but causally =nsulated from physics.)

Cheers!

Joscha

> Am 31.12.2014 um 13:02 schrieb jeffrey E. <jeevacation@gmail.com>:

>

> well done. I think you might want to consider more of a feedback =ystem all along the way, it appeared to me as too much as a one way =rocessor.

>

> On Wed, Dec 31, 2014 at 7:38 AM, Joscha Bach

> Dear Jeffrey,

>

> at Hamburg's 31c3 conference, I had the opportunity to demonstrate how = computational universe can give rise to consciousness. If you like, =lease have a look; after all, you are the one making it possible.

>

> =ttp://media.ccc.de/browse/congress/2014/31c3_-_6573_-_en_-_saal_2_-_2
> 0141=281130_-_from_computation_to_consciousness_-_joscha.html#video&t=
> 1

## >

> Very best wishes for the start into the new year!

>

> — Joscha

>

>

>

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