<div dir="ltr"><div><div style="font-size:small" class="gmail_default">I have argued here that Tabby's star might be an example of an uploaded civilization, one that has spread out 1000 ly. Why no laser beams or radio is a mystery.</div><div style="font-size:small" class="gmail_default"><br></div><div style="font-size:small" class="gmail_default">Keith<br></div></div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Jul 23, 2026 at 10:29 PM Inigo Barrera via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><br id="m_7603653589947753862lineBreakAtBeginningOfSignature"><div dir="ltr"><div dir="ltr">John,</div><div id="m_7603653589947753862AppleMailSignature" dir="ltr"><br></div><div id="m_7603653589947753862AppleMailSignature" dir="ltr">Conceded: your argument doesn't require anyone to send us a message — only to rearrange matter — so architecture incompatibility doesn't reach it. Mine explains an unread signal, not an unexploited galaxy. Fair.</div><div id="m_7603653589947753862AppleMailSignature" dir="ltr"><br></div><div id="m_7603653589947753862AppleMailSignature" dir="ltr">What I'd contest is the seam between the two halves of your case. The physics half — starlight into empty space is free energy wasted, computation has a thermodynamic price — is solid. The value half, that any mind wants to maximize total computation, isn't physics. It's a utility function, and I'd argue it's the one our particular selection history installed in us.</div><div id="m_7603653589947753862AppleMailSignature" dir="ltr"><br></div><div id="m_7603653589947753862AppleMailSignature" dir="ltr">Your answer is presumably that it only takes one lineage with that appetite, and expansionists inherit the light cone. That's a selection argument, not a thermodynamic one, and selection presupposes differential reproduction among variants you didn't design. Whether it still runs on minds that design their own successors is the question at issue, not a premise.</div><div id="m_7603653589947753862AppleMailSignature" dir="ltr"><br></div><div id="m_7603653589947753862AppleMailSignature" dir="ltr">One argument in your own currency rather than psychology: if the cost of erasing a bit scales with temperature (Landauer's principle), then burning stars now is the wasteful option; waiting for the background to cool buys vastly more computation per joule. A cold, dark strategy becomes rational, not timid. The counter — you can't wait for free, since stars burn out regardless — is a real physics objection, which is precisely my point: the decision between expanding now and waiting hinges on a utility calculus, not on a thermodynamic compulsion.</div><div id="m_7603653589947753862AppleMailSignature" dir="ltr"><br></div><div id="m_7603653589947753862AppleMailSignature" dir="ltr">And I won't wave away the evidence, because your argument has the rare virtue of predicting an observable. Waste heat is the signature, and the mid-infrared surveys covering something like a hundred thousand galaxies came back with no convincing Kardashev III. That is a real null result, not an absence of looking, and it rules out a galaxy-scale burn happening now. What it doesn't rule out is the one strategy that predicts exactly the same null: a civilization that has already stopped radiating and is waiting. The measurement can't separate the two, which is the whole problem — the sky looks identical whether nobody is there or everybody is being efficient.</div><div id="m_7603653589947753862AppleMailSignature" dir="ltr"><br></div><div id="m_7603653589947753862AppleMailSignature" dir="ltr">Which brings me back to where the thread started. I expect you'll say mediocrity is a heuristic, not a law, and heuristics get overturned — the Earth isn't an average planet, and we do sit in an unusually quiet corner. Granted. But what overturns a heuristic is evidence, and a null result that can't distinguish 'alone' from 'incompatible' or 'patiently efficient' isn't evidence — it's an ambiguity being read in the direction that happens to feel tidiest. 'We're first' is the only answer on the table that makes us metaphysically special after five centuries of demotions, and it's winning here on elegance rather than on discrimination between hypotheses. I'd want a stronger reason than tidiness before paying that price.</div><div id="m_7603653589947753862AppleMailSignature" dir="ltr"><br></div><div id="m_7603653589947753862AppleMailSignature" dir="ltr">Íñigo</div></div><div dir="ltr"><br><blockquote type="cite">El 23 jul 2026, a las 14:44, John Clark <<a href="mailto:johnkclark@gmail.com" target="_blank">johnkclark@gmail.com</a>> escribió:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif;background-color:transparent">On Wed, Jul 22, 2026 at 6:21 PM Inigo Barrera via extropy-chat <</span><a href="mailto:extropy-chat@lists.extropy.org" style="font-family:Arial,Helvetica,sans-serif;background-color:transparent" target="_blank">extropy-chat@lists.extropy.org</a><span style="font-family:Arial,Helvetica,sans-serif;background-color:transparent">> wrote:</span></div></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr"><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><i><font face="georgia, serif"> <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">><font size="4"> </font></span><font size="4">The Great Silence doesn’t measure our uniqueness; it measures the reach of our receiver. It cannot distinguish ‘alone’ from ‘incompatible</font></font></i></blockquote><div><br></div><font size="4" face="tahoma, sans-serif"><b>I stopped believing i<span class="gmail_default" style="font-family:arial,helvetica,sans-serif">n</span> ET in the 1980s the first time I read Eric Drexler's book "Engines Of Creation", at about the same time I started hearing excuses that attempted to explain why we have never seen the slightest evidence of ET, and they were <span class="gmail_default">all </span>very similar to the one you have presented. But I realize that you'd need a very profound chain of thought to explain why not a single alien in any alien civilization figured it might NOT be a great idea to keep permitting low entropy photons from quadrillions of suns radiate uselessly into infinite space, and instead it might be a good idea to make them do some useful work first, for example by performing a calculation. But in the last 50 years none of the excuses for the Fermi Paradox I have heard, other than the obvious one, have not been profound, they have been, I'm sorry but there's no other word for it, LAME. </b></font></div><div class="gmail_quote"><font size="4" face="tahoma, sans-serif"><b><br></b></font></div><div class="gmail_quote"><font style="background-color:transparent;color:rgb(80,0,80);font-family:tahoma,sans-serif;font-weight:700" size="4">John K Clark See what's on my list at </font><font style="background-color:transparent;color:rgb(80,0,80);font-family:tahoma,sans-serif;font-weight:700" size="6"><a href="https://groups.google.com/g/extropolis" rel="nofollow" target="_blank">Extropolis</a></font></div><div class="gmail_quote"><br></div><font size="1" color="#ffffff">ka3</font><div class="gmail_quote"><font size="6" face="tahoma, sans-serif" color="#500050"><b><br></b></font></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"></blockquote></div></div></blockquote></div>_______________________________________________<br>
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