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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> extropy-chat-bounces@lists.extropy.org [mailto:extropy-chat-bounces@lists.extropy.org] <b>On Behalf Of </b>John Clark<br><b>Sent:</b> Saturday, December 25, 2010 10:47 AM<br><b>To:</b> ExI chat list<br><b>Subject:</b> Re: [ExI] simulation as an improvement over reality<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Dec 24, 2010, at 6:26 AM, Eugen Leitl wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='color:#1F497D'>>>></span>Spike, we *did* discuss strange matter life way back, including<span style='color:#1F497D'> </span>possibility of life near Planck scale.<span style='color:#1F497D'> </span>It seems our collective list memory has got a case of Alzheimer's...<span style='color:#1F497D'><o:p></o:p></span></p></blockquote></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><span style='color:#1F497D'>></span>I wrote this to the list on January 8 1996: <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal><span style='color:#1F497D'>></span>I remember hearing speculation about femtomachines that operated at a scale <o:p></o:p></p></div><div><p class=MsoNormal>of 10^-15m . The idea was to build things with strangelet quark structures. <o:p></o:p></p></div><div><p class=MsoNormal>Unfortunately I don't see how this could work, objects would not be rigid, <o:p></o:p></p></div><div><p class=MsoNormal>and you can't build machines with a liquid. There is little more I can say on <o:p></o:p></p></div></div><div><div><p class=MsoNormal>that subject because unlike nanotechnology, building things on this scale <span class=apple-style-span><o:p></o:p></span></p><div><p class=MsoNormal>would require a scientific breakthrough and they are inherently unpredictable.<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> <span style='color:#1F497D'>></span>John K Clark <o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Sure but this did not exhaust the notion of a post MBrain life form that eventually needs to drop down to the solid surface to live as a crust on an extinct star. That life form need not exist on a Planck scale, but it might.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>1996 predated any mature version of Robert Bradbury’s MBrain, which I think was first proposed about a couple years later. We were working out the details of the orbit mechanics before Extro5, but after Extro4, which is where I first met RB in the flesh. Isn’t that where he shouted “THAT’S NOT TRUE!” in the middle of someone’s presentation? {8^D So the MBrain notion would have been in about 2000 or 2001 range. That was the time K. Eric Drexler saved my life by transporting me in his Detroit through a Berkeley neighborhood to my motorcycle.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I don’t think this notion is about life on a Planck scale in any case. It is far easier for me to imagine an intelligent life form where the nodes are many orders of magnitude larger than Planck scale but still individually microscopic, analogous to a smart version of a blue-green algal mat.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>spike<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>