<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif">On Mon, Sep 28, 2020 at 1:45 AM Adrian Tymes via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>> wrote:</span><br></div></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr"><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">></span>The paper is less than the article seems.</blockquote><div><br></div><div><i><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">></span>To be short and only somewhat imprecise, it's a better proof than previously existed that, if you assume no Grandfather Paradox, then you get no Grandfather Paradox</i></div></div></blockquote><div><br></div><div><font size="4">Yeah, if you <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">c</span>an't change the past <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">then</span> you haven't really visited <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">the past</span> you've just observed<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"></span> the past<span class="gmail_default" style="font-family:arial,helvetica,sans-serif">. And we can already do that with old movies.</span></font></div><div><font size="4"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></span></font></div><div><font size="4"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">John K Clark</span></font></div><div><font size="4"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></span></font></div><div><font size="4"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">  </span></font></div></div></div>