[ExI] [Extropolis] Crosspost

[Keith Henson]

On Sun, Apr 13, 2025 at 4:35 AM John Clark <johnkclark at gmail.com> wrote:
>
> On Sun, Apr 13, 2025 at 2:47 AM Keith Henson <hkeithhenson at gmail.com> wrote:
>
>> http://hplusmagazine.com/2012/04/12/transhumanism-and-the-human-expansion-into-space-a-conflict-with-physics/
>
> That link doesn't work.

Try

https://web.archive.org/web/20121130232045/http://hplusmagazine.com/2012/04/12/transhumanism-and-the-human-expansion-into-space-a-conflict-with-physics/

>> > The structures (if they are structures) are 1.5 light seconds across.
>> That implies that their subjective perception of time is about the
>> same as we use .
>
> I don't think it's as simple as that for two reasons:

The article assumed that uploading humans would communicate with the
same delay we now experience on Earth. A million-to-one speed-up
required shrinking the hardware-to-hardware distance to 300 meters for
the same subjective experience.

> 1) The maximum time it takes to send a message from one side of the brain to the other is NOT the only factor, another factor that is just as important if not more so is the bandwidth of that message channel; and for Mr. Jupiter Brain that bandwidth would be many billions or trillions of times wider than any biological brain has.
>
> 2) Mr. Jupiter Brain wouldn't need to use His entire brain for simple tasks, such as finding the integral of a 4D tensor equation, He would probably not be consciously aware of the steps He used to find it nor would He need to be, for Him the answer would just be intuitively obvious. In the same way a baseball player is not consciously aware of the steps his brain used to figure out the split second when he should start to swing his bat, he swung it when his intuition told him the time was right.

Popularly I was tagged with conceiving of the Jupiter Brain.  It
wasn't me, I located the thread.  I responded by throwing cold water
on the idea for the reasons that a large computer would operate slowly
because it could not be of one mind if some parts were not
communicating due to the speed of light,

>> > (again if there are any aliens)
>
> The events of the last two years have made me even more convinced that ET doesn't exist, if he did we'd know by now.

What events?

If you can account for the blinking of 24 stars in a 2000 LY cluster
in any way that does not involve aliens I would be most interested.

I hope you can, I don't want to be right.

But the blinks did cause me to think about the fate of uploaded
humans.  If you want to build power and heat sink hardware for
trillions of uploaded humans, you would probably do it in the
"computational" zone say 5 AU where error rates are kept down by the
low temperature.

Keith

>  John K Clark
>
>
>>
>>
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