tag:blogger.com,1999:blog-1500584444083499721.post5343600762268911069..comments2024-03-24T09:28:42.755+01:00Comments on CJ on Mathematics and Science: Physics Illusion 6: Gravitational Force Between Each Pair of Particles Claes Johnsonhttp://www.blogger.com/profile/07411413338950388898noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-1500584444083499721.post-9747890967614123872014-02-23T20:00:21.335+01:002014-02-23T20:00:21.335+01:00Instant action at distance is an example of a proc...Instant action at distance is an example of a process which cannot be realized as a physical process of the same form as an explicit time-stepping computational algorithm and thus is not physical. This statement is not void of information.Claes Johnsonhttps://www.blogger.com/profile/07411413338950388898noreply@blogger.comtag:blogger.com,1999:blog-1500584444083499721.post-24616632880274123642014-02-23T15:58:52.575+01:002014-02-23T15:58:52.575+01:00Real physics must be some form of computational pr...<i>Real physics must be some form of computational process, since if not it can only be magical.</i><br /><br />This is of course a trivial truism if we are to be able to do physics at all. <br /><br />Hence it is completely void of information of the nature of such computation.<br /><br />It must be as Rickard writes, such a computation could very well be intractable for humans.Voidnoreply@blogger.comtag:blogger.com,1999:blog-1500584444083499721.post-54934605816180468882014-02-22T19:54:06.756+01:002014-02-22T19:54:06.756+01:00Real physics must be some form of computational pr...Real physics must be some form of computational process, since if not it can only be magical.Claes Johnsonhttps://www.blogger.com/profile/07411413338950388898noreply@blogger.comtag:blogger.com,1999:blog-1500584444083499721.post-82327456088160581592014-02-22T19:13:25.451+01:002014-02-22T19:13:25.451+01:00Why should the nature of reality have anything to ...Why should the nature of reality have anything to do with what is easy or feasible to compute? If it was established that reality was in fact a big computer simulation, I could see your point. But the amenability to computation could be arbitrarily low for a reality that is indifferent to the needs and wants of humans.Rickardnoreply@blogger.comtag:blogger.com,1999:blog-1500584444083499721.post-14624065819652194522014-02-22T15:48:57.352+01:002014-02-22T15:48:57.352+01:00You are missing the point which is that the physic...You are missing the point which is that the physical model assumes particle-particle interaction, which is impossible.Claes Johnsonhttps://www.blogger.com/profile/07411413338950388898noreply@blogger.comtag:blogger.com,1999:blog-1500584444083499721.post-45334780460051080002014-02-22T14:32:58.740+01:002014-02-22T14:32:58.740+01:00I hardly think that the Millenium Run involved act...I hardly think that the Millenium Run involved actual individual atoms. The reasonable thing would be to compute on a conglomerate acting as a "particle". Compare with a continuum model like fluid mechanics.<br /><br />Further, you must be aware that the interaction between two bodies, like the Sun and the Earth, of course doesn't need to be calculated with regard to every single atom since they can be perfectly represented as point particles in the center of mass, thats like first semester mechanics... :-)Anonymousnoreply@blogger.com