<html><head><style type=text/css><!--
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--></style></head><body><div><span data-mailaddress="kuudes@leijuvakaupunki.fi" data-contactname="kuudes" class="clickable"><span title="kuudes@leijuvakaupunki.fi">Hi Kuudes!</span></span></div><div><span data-mailaddress="kuudes@leijuvakaupunki.fi" data-contactname="kuudes" class="clickable"><span title="kuudes@leijuvakaupunki.fi"><br></span></span></div><div><span data-mailaddress="kuudes@leijuvakaupunki.fi" data-contactname="kuudes" class="clickable"><span title="kuudes@leijuvakaupunki.fi">kuudes</span><span class="detail"> <kuudes@leijuvakaupunki.fi></span></span> , 22/4/2015 5:47 PM:<br><blockquote class="mcnt mori" style="margin:0 0 0 .8ex;border-left:2px blue solid;padding-left:1ex;"><div class="mcnt">What is extropy? I think I have run into something, which relates to a system having capability of creating entropy in future, and also I have read the Wissner-Gross paper (<a href="http://dspace.mit.edu/openaccess-disseminate/1721.1/79750" title="http://dspace.mit.edu/openaccess-disseminate/1721.1/79750" target="_blank">dspace.mit.edu/openaccess-disseminate/1721.1/79750</a>) on entropic force. In general, I feel somewhat confused on these concepts. What should I read and is it feasible for me to try to learn these things? Are these concepts related to the area of the interest of this list or some general community?</div></blockquote></div><div><br></div>I don't think so, at least directly. These papers are playing with entropic forces that generate useful "smart" behaviour because the setup is somewhat particular.<div><br></div><div>I think the original extropy idea, as something that resists or reduces entropy while increasing complexity, is more akin to open non-equilibrium thermodynamic systems. Think of Chaissons entropy rate density (http://www.informationphilosopher.com/solutions/scientists/chaisson/) or the various attempts in the 90s to formulate a theory of complex, adaptive systems. We see how biological evolution, by dissipating energy and increasing external entropy, can produce not just ordered and self-maintaining systems (autopoiesis), but also a wide diversity of systems that seem to accumulate complexity or even invent new ways of evolving. <br><div><br></div><div>In the end extropy is more of a metaphor than something measurable or actual. But there may be interesting possibilities when one takes it seriously as a thing for a while. </div><br><br>Anders Sandberg, Future of Humanity Institute Philosophy Faculty of Oxford University</div></body></html>