[ExI] (no subject)

[William Flynn Wallace]

Is it possible to explain to a physics deficient person how celestial
bodies can accelerate?  What gives them motion other than the Big Bang?
 bill w

On Sun, Jun 18, 2023 at 9:03 AM Gadersd via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> Is there not sufficiently little data on how universes work that the
> assumption of an inevitable heat death is essentially speculation at this
> time?  Speculation with some evidence, but much less thoroughly proven than
> most things we take as absolutes.
>
>
> The universe is expanding and the expansion accelerates. There is a
> distance at which the expansion exceeds the speed of light at which point
> two objects will never come into contact again, barring some speculative
> wormhole wizardry. Most matter will then eventually be inaccessible to us
> and we will find ourselves isolated within islands of matter. Any finite
> system held within a particular volume of space will eventually become
> cyclic, at least in distribution. There is no real immortality in such a
> state since the distant future is the distant past. Any growth or
> experience is eventually reset and novelty is neutered.
>
> The common viewpoint among physicists is that such a confined system
> converges to a uniform distribution of matter states such that any
> configuration is equally likely. This is a Boltzmann brain scenario. There
> is no structure to the experience of a Boltzmann brain as the probability
> of all experiences are equally likely. This is a state of maximum entropy
> with respect to experience. This is true death.
>
> More likely, the density of space will decrease as matter and energy
> scatter. Then eventually there will be so few matter interactions that
> complex structures will be essentially extinct.
>
> There is some degree of necessity to this. If space did not expand and the
> distribution of matter approached uniformity then Boltzmann brains would
> become more numerous than structured brains for almost all time. The
> frequency of our structured existence relative to Boltzmann brains would
> then diminish. The expansion of space and the eventual dearth of matter
> interactions ensures that our existence remains relatively relevant.
>
> There is little hope in yonder years. We should be content with a few
> billion years, though some of us may live much longer.
>
> On Jun 17, 2023, at 11:58 PM, Adrian Tymes via extropy-chat <
> extropy-chat at lists.extropy.org> wrote:
>
> On Sat, Jun 17, 2023 at 7:15 PM Gadersd via extropy-chat <
> extropy-chat at lists.extropy.org> wrote:
>
>> This will buy some time, but still doesn’t avoid the inevitable heat
>> death. If the multiverse has sufficient variety then it may be that there
>> exists a version of each of us where some being pulls us out of the
>> “simulation." Infinite other survival possibilities are also possible in a
>> multiverse with sufficient variety. If all mathematical structures exist
>> then these possibilities are inevitable, granting potential true
>> immortality. The probabliity distribution of these possibilities remains
>> unknown as we lack a theory of everything. Better not to put hope in
>> speculation.
>>
>
> Is there not sufficiently little data on how universes work that the
> assumption of an inevitable heat death is essentially speculation at this
> time?  Speculation with some evidence, but much less thoroughly proven than
> most things we take as absolutes.
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