On Mon, Nov 27, 2017 at 05:09:13PM -0800, Brent Meeker wrote: > > > On 11/27/2017 4:17 PM, Russell Standish wrote: > > On Mon, Nov 27, 2017 at 03:57:37PM -0500, John Clark wrote: > > > <agrays...@gmail.com> wrote: > > > > > > > > > > > > Your source is fact-challenged. Weinberg thinks MULTIVERSE may have > > > > merit, > > > > but NOT the MWI, > > > > > > Then give me some facts! Where does Weinberg say that? And how can you > > > have a multiverse without many worlds or many worlds without a > > > multiverse? > > Alan deliberately uses the term "Multiverse" to refer to the string > > landscape. Note this usage contravenes the usage of Multiverse by > > everybody else here, which normally is as David Deutsch originally intended > > by > > the term, the multiple universes of the MWI, or sometimes even more > > generally as any of the Tegmarkian ensembles. > > I think we should use "multiverse" to refer to the cosmological multiplicity > per Tegmark and use "multiple worlds" to refer to the quantum multiplicity > of Everett (so it's consistent with the abbreviation MWI). >
Tegmark uses "multiverse" to refer to any of his parallel universe classes, including the many worlds. This wikipedia article also takes the same view https://en.wikipedia.org/wiki/Multiverse In my book, I use Multiverse consistently to refer to the quantum many worlds, following David Deutsch, who I believe(d) introduced the term, and Plenitude to refer to Tegmark's level 4. I don't have nicknames for the other two Tegmarkian "multiverses". PS - according to Wikipedia, the actual term was coined by William James in 1895! It is just terminology, and terminology should be allowed to evolve, just so long as everybody is clear about what is being discussed. I appreciate that it appears these days that multiverse can refer to any parallel universe theory, a la Tegmark, so that's how we should be using it, and qualify (eg quantum multiverse) where needed. -- ---------------------------------------------------------------------------- Dr Russell Standish Phone 0425 253119 (mobile) Principal, High Performance Coders Visiting Senior Research Fellow hpco...@hpcoders.com.au Economics, Kingston University http://www.hpcoders.com.au ---------------------------------------------------------------------------- -- 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 https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
