tag:blogger.com,1999:blog-7225373.post464484079491735470..comments2024-02-29T03:34:23.190-05:00Comments on Who Were the Sea Peoples?: The single time machinegcallahhttp://www.blogger.com/profile/10065877215969589482noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-7225373.post-15346955537923114082015-06-04T16:42:03.014-04:002015-06-04T16:42:03.014-04:00Indeed! Good point. Indeed! Good point. Ken Bhttps://www.blogger.com/profile/08207803092348071005noreply@blogger.comtag:blogger.com,1999:blog-7225373.post-51373400936435690932015-06-04T15:46:07.746-04:002015-06-04T15:46:07.746-04:00Ken, I know about Feynman. This I think supports m...Ken, I know about Feynman. This I think supports my contention: we have already seen that particle, right?gcallahhttps://www.blogger.com/profile/10065877215969589482noreply@blogger.comtag:blogger.com,1999:blog-7225373.post-72880472763182763492015-06-03T19:49:27.561-04:002015-06-03T19:49:27.561-04:00Post hoc ergo imprompter hoc? Post hoc ergo imprompter hoc? Ken Bhttps://www.blogger.com/profile/08207803092348071005noreply@blogger.comtag:blogger.com,1999:blog-7225373.post-14355953255597826032015-06-03T19:47:37.046-04:002015-06-03T19:47:37.046-04:00this goes back to the "the map is not the ter...this goes back to the "the map is not the terrain". The manifold in GR is indeed an object that is just there. But it's the map, isn't it? <br /><br />Anyway Gene I find your proof compelling but you might not know about Feynman's notion of one particle going back and forth in time, weaving the universe. Worth hunting down if you don't. Ken Bhttps://www.blogger.com/profile/08207803092348071005noreply@blogger.comtag:blogger.com,1999:blog-7225373.post-78933361685008779662015-06-02T10:33:07.475-04:002015-06-02T10:33:07.475-04:00Good points.Good points.gcallahhttps://www.blogger.com/profile/10065877215969589482noreply@blogger.comtag:blogger.com,1999:blog-7225373.post-14749229382457514562015-06-02T10:32:53.378-04:002015-06-02T10:32:53.378-04:00"According to the theories of Ron Mallet, the..."According to the theories of Ron Mallet, the time machine would only be able to take people back to the point in time when it became operational."<br /><br />That seems a little ad hoc. But then I don't know the theories of Ron Mallet.gcallahhttps://www.blogger.com/profile/10065877215969589482noreply@blogger.comtag:blogger.com,1999:blog-7225373.post-64737223205501046252015-06-02T07:48:36.382-04:002015-06-02T07:48:36.382-04:00There is an interesting further philosophical poin...There is an interesting further philosophical point here: the very notion that time travel is even possible depends on some version of the Eternalist view of time (that is, the past, present and future are all equally real: the whole present, past, and future of the universe already exists in a massive “block”).<br /><br />But Eternalism is not proven, it remains a kind of lazy assumption from general relativity and is deeply incompatible with the way we consciously experience a dynamic moving present.<br /><br />And actually some highly respected physicists now argue that Eternalism is wrong and they argue that Presentism (i.e., only the present really exists) is right.<br /><br />I discussed this issue here for what it is worth:<br /><br />http://socialdemocracy21stcentury.blogspot.com/2013/04/the-nature-of-time-science-and-economics.htmlLord Keyneshttps://www.blogger.com/profile/06556863604205200159noreply@blogger.comtag:blogger.com,1999:blog-7225373.post-16128446872005313752015-06-02T03:04:52.650-04:002015-06-02T03:04:52.650-04:00"if time machines are ever going to be invent..."if time machines are ever going to be invented, we should have already seen them, since presumably people would be traveling back to our time."<br /><br />This presumes that time machines have sufficient range to travel to our time.<br /><br />According to the theories of Ron Mallet, the time machine would only be able to take people back to the point in time when it became operational.<br /><br />The time machine in the film 'PRIMER' works along these lines. I believe the time machine in the film 'Time Crimes' could only take you one hour into the past. It's a fun movie that explores the paradoxes of time travel.Anonymousnoreply@blogger.com