[ExI] Slow thinking

[Keith Henson]

On Fri, Sep 30, 2011 at 1:47 PM,   john clark <jonkc at bellsouth.net> wrote:

> Subject: Re: [ExI] Feasibility of solid Dyson Sphere WAS mbrains
>        again.
>
> On Fri, 9/30/11, Keith Henson <hkeithhenson at gmail.com> wrote:
> "My objection to mbrain is the same I had to jupiter brains, speed of
> light delays.? The bigger you get, the slower it thinks."
> The fastest signals in the human brain move at a couple of hundred meters a second, many are far slower, light moves at 300 million meters per second. So if you insist that the 2 most distant parts of a Jupiter brain communicate as fast as they do in a human brain (and it is not immediately obvious why you should insist on such a thing) then parts could be one million times as distant. The volume of such a brain would be a million trillion times larger than a human brain, and the components would be considerably smaller too.

And the point of this 10^15 larger brain that thinks no faster than a
human would be?

Keith