<html><head></head><body><div><span data-mailaddress="rafal.smigrodzki@gmail.com" data-contactname="Rafal Smigrodzki" class="clickable"><span title="rafal.smigrodzki@gmail.com">Rafal Smigrodzki</span><span class="detail"> <rafal.smigrodzki@gmail.com></span></span> , 5/9/2014 7:54 PM:<br><blockquote class="mori" style="margin:0 0 0 .8ex;border-left:2px blue solid;padding-left:1ex;"><div><br><div class="mcntgmail_extra"><div class="mcntgmail_quote"><div>### What I had in mind is not necessarily killing the cute young puppy civilizations, although a supermind dwelling in the darkness might see this is as entirely unobjectionable. Hypervelocity objects striking all planets bearing monocellular life, sufficient to boil the top layer of rock, once every billion years, should do the trick bloodlessly by preventing life from ever getting close to generating a civilization.</div><div><br></div><div>Maybe ours is just running late :)</div></div></div></div></blockquote></div><div><br></div>If the system is sloppy enough to miss a few biospheres like ours, it is not stable enough to act as an explanation of the Fermi question:<div>http://www.seti.ac.uk/dir_setinam2013/posters/posters_NAM2013_anders_sandberg.pdf</div><div>(see the question 2 section to the right).<br><div><blockquote class="mori" style="margin:0 0 0 .8ex;border-left:2px blue solid;padding-left:1ex;"><div><div class="mcntgmail_extra"><div class="mcntgmail_quote"><div></div></div></div></div></blockquote></div><br><br>Anders Sandberg, Future of Humanity Institute Philosophy Faculty of Oxford University</div></body></html>