<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 19, 2016 at 7:16 AM, Anders Sandberg <span dir="ltr"><<a href="mailto:anders@aleph.se" target="_blank">anders@aleph.se</a>></span> wrote:</div><div class="gmail_quote"><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000">
Remember the Bostrom and Tegmark paper on doomsday probability? It
shows, using anthropics, that the probability of vacuum decay is
less than one in a billion per year. If we had been living in a
Shiva unniverse we should expect to be very early (since observers
exist before the vacuum decay), but Earth formed after most other
planets in the universe formed and we look like we are fairly late
compared to when intelligence could have emerged. <br></div></blockquote><div><br></div><div>### You are right, the Shiva explanation does not work without additional assumptions about how early the first civs could have formed.</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000"><blockquote type="cite"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">
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Superluminal? I though all vacuum decay models had it spreading
merely at lightspeed?<br>
<br></div></blockquote><div><br></div><div>### This is one (of many) things I don't quite get: Inflation was superluminal and occurred after the false vacuum decay that generated our spacetime, so you would think the change would propagate superluminally.</div><div><br></div><div>Now that I think about it, maybe it went like this: vacuum decay generated new dimensions and inflation occurred in these new dimensions, not in the parent universe. Linde's eternal inflation does not blow up the non-inflating domains, it keeps happening between them.</div><div><br></div><div>Well, anyway, even if the change is only at lightspeed, we won't see it coming.</div><div><br></div><div>Rafał </div></div>
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