<div dir="ltr">Anders:<div><br></div><div>> <span style="font-size:12.8000001907349px">If you are worried about pre-emption the situation changes</span></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">Every good Universe spammer repeats his message quite often. Repeating, here means ever faster, ever more reliable and efficient probes, to which all older, slower probes are prey items. Willing prey items, glad to be recycled and reused.</span></div><div><br></div><div>Columbus on his voyage to the West Indies was never caught by a faster Spanish ship to be re-armed with some new ship guns invented and produced back in Spain after he left the shore. As captain Cook was never updated from home with anything. Let alone with a better ship.</div><div><br></div><div>But now, it's a different story. Some today space probes are quite frequently updated with at least a new software version.</div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">For the galaxy and beyond colonization, it's a must.</span></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 29, 2015 at 12:15 PM, Anders Sandberg <span dir="ltr"><<a href="mailto:anders@aleph.se" target="_blank">anders@aleph.se</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><span><span title="kanzure@gmail.com">Bryan Bishop</span><span> <<a href="mailto:kanzure@gmail.com" target="_blank">kanzure@gmail.com</a>></span></span> , 26/1/2015 9:03 PM:<div><div class="h5"><br><blockquote style="margin:0 0 0 .8ex;border-left:2px blue solid;padding-left:1ex"><div><div>On Mon, Jan 26, 2015 at 1:48 PM, BillK <span><<a href="mailto:pharos@gmail.com" title="mailto:pharos@gmail.com" target="_blank">pharos@gmail.com</a>></span> wrote:<br><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="overflow:hidden">It would only take a few million years to spread Neumann probes<br>
throughout our galaxy. So advanced ET either hasn't appeared in our<br></div></blockquote></div><br>I saw math somewhere about relative speed-ups and head-starts by just having a single year of a head start, versus 10 years, and versus 100 years. So in the absence of having a working von Neumann probe, perhaps using literally anything else secures victory, especially if it will take you millions of years to make anything better. (Hopefully, kinematic self-replication will not take us more than 100 years to figure out.)<br><div></div></div></blockquote></div></div></div><div><br></div><div>Over long distances speed tends to win over start time.</div><div><br></div><div>If you start at time t, at time T you will have reached distance D=v(T-t). So dD/dv = (T-t), dD/dt = -v. D = D0 + (T-t)*dv - v*dt+.... So if the delay in making faster probes is less than (T-t)/v they are worth it. Now, if T is small you might want to rush with whatever you have. But if T is billions of years, then waiting may be rational. </div><div><br></div><div>For Stuart's and mine intergalactic spamming paper we found that million-year waits for making super ultrarelativistic probes would be worth it. </div><div><br></div><div>If you are worried about pre-emption the situation changes; it introduces a penalty term for larger t, giving some optimum time to wait and develop the tech. </div><span class=""><br><br>Anders Sandberg, Future of Humanity Institute Philosophy Faculty of Oxford University</span></div><br>_______________________________________________<br>
extropy-chat mailing list<br>
<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a><br>
<a href="http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat" target="_blank">http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><a href="https://protokol2020.wordpress.com/" target="_blank">https://protokol2020.wordpress.com/</a><br></div></div>
</div>