On Wed, Feb 26, 2020 at 9:26 AM 'Brent Meeker' via Everything List < [email protected]> wrote:
> On 2/25/2020 8:53 AM, smitra wrote: > > On 22-02-2020 01:20, 'Brent Meeker' via Everything List wrote: > >> On 2/21/2020 4:00 PM, smitra wrote: > >>> On 16-02-2020 05:48, 'Brent Meeker' via Everything List wrote: > >>>> On 2/15/2020 9:30 AM, smitra wrote: > >>>> > >>>>> The main issue is unitary time evolution. This is a rather > >>>>> unambiguous thing that one can check in experiments. A breakdown of > >>>>> unitary time evolution has never been observed. > >>>>> > >>>>> As Brent has pointed out, unitary evolution breaks down every time > >>>>> we > >>>>> observe a particular result for a measurement (to say nothing of > >>>>> black > >>>>> holes). Your focus on unitary evolution is misplaced -- it is not > >>>>> universally observed. > >>>> > >>>> This has no bearing on the unitary time evolution of an isolated > >>>> system. We can infer from measurements that an isolated system does > >>>> evolve in a unitary way. Non-unitary time evolution would violate the > >>>> known laws of physics. > >> > >> Only the "known" law that all time evolution is unitary. In the > >> Transactional interpretation there are random violations of unitary > >> evolution, as there are GRW and other real collapse versions of QM. > >> You, like most MWI proponents, assume your purist version is a "law of > >> physics" when the whole question is "What are the laws physics." > >> > >> Brent > > > > When comparing different theories one has to weigh up the experimental > > evidence to see what theory fits the evidence the best. Normally we > > would consider theories that introduce new, as of yet unobserved > > physics when it's not clear that the theory solves a real problem, to > > be extremely speculative. This is the case for collapse theories, they > > introduce new physics that has never been observed, > > They would say nothing else has been observed. Certainly multiple > worlds have not been observed. The observation is always that there is > a single result. > Yes. It looks very much as though Saibal is applying the same double standard as is used by most Everettians. Bruce -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAFxXSLTsT9WtEe_tGGDs04ufpWqny_UqTLrp8H2eGk7U0i2yzQ%40mail.gmail.com.
