[ExI] Superintelligent AI civilisations

[Keith Henson]

Half a second across the brain or around half a Hertz. Human cycle time is
about 200 Hz or 400 times as fast. If it mattered, any of us could outhink
a Jupiter brain. Eliezer once commented that a physically large brain would
think very slowly.

Keith


On Thu, Jul 30, 2026 at 3:50 PM John Clark via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> On Wed, Jul 29, 2026 at 12:42 PM Keith Henson via extropy-chat <
> extropy-chat at lists.extropy.org> wrote:
>
> *> Light speed has always been my objection to physically large brains.*
>>
>
> *I think Mr. Jupiter Brain will be composed of billions or trillions of
> closely interlocked agents just as many modern AI's are, although they
> usually only have a few hundred. Some of those agents would be generalists
> and some of them would be specialists. Jupiter is about 85,000 miles in
> diameter, light travels at 186,000 miles a second. So AT MOST it would take
> about 0.46 seconds for one agent to send a message to another, and about
> 0.9 seconds for it to receive a reply. Except for very short messages that
> demand a near instantaneous yes or no answer, and there wouldn't be many of
> them, this delay would cause few problems and be compensated for by the
> fact that the bandwidth between agents would be VASTLY wider than the one
> the human brain uses to communicate between one side of the brain and the
> other.  *
>
>
> *Humans seem to have something similar to agents going on inside their
> heads, but the extremely narrow bandwidth between agents means that a big
> improvement in one often has little improvement in any other agent. That's
> why somebody might be the best human chess player in the world but not be
> particularly good at doing anything else. *
>
> *John K Clark*
>
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