On 1 May 2015 at 12:34, Bruce Kellett <bhkell...@optusnet.com.au> wrote:
> LizR wrote: > >> On 30 April 2015 at 16:32, Bruce Kellett <bhkell...@optusnet.com.au >> <mailto:bhkell...@optusnet.com.au>> wrote: >> >> So where are the space and time dimensions of Platonia? Not to >> mention the necessity of a Minkoskian metric. (Space and time are >> interchangeable only within the limits of the light cone.) >> >> Dimensions are (represented by) coordinate systems. Minkowski spacetime >> is (represented by) a 4D manifold. >> > > My point was that this has to emerge from the Platonia envisaged by Bruno > -- it can't simply be imposed by fiat. > I was simply answering what you asked - if there was an original point to do with comp it had either been truncated, or I missed it. I agree that there is a requriement for Bruno (or his successors) to explain how time and dimensions emerge from comp. (They do of course exist in Platonia as mathematical objects - assuming, as you and I both do, that maths exists tautologically). > > I have been looking again at Julian Barbour's book. His Platonia is > essentially the configurations space of quantum mechanics: three spatial > coordinates for every particle in the universe. In this Platonia all > possible configurations of the universe are realized. This has a vast > number of dimensions, but still some structure is imposed by knowing that > space is three dimensional and that there was a big bang (at some point, > not an imposed /beginning/). > Yes, I read that some time ago (or however he would put that ... in a distant capsule / pigeon hole?) I can't remember now if he uses the Wheeler-DeWitt equation as a basis for his views - could you remind me? > > Computationalism does not have this head start -- it has to get it all > from nothing. > > It does indeed. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
