On 7/27/2018 11:21 AM, Quentin Anciaux wrote:


Le ven. 27 juil. 2018 à 20:18, Brent Meeker <meeke...@verizon.net <mailto:meeke...@verizon.net>> a écrit :



    On 7/26/2018 11:31 PM, Quentin Anciaux wrote:


    Le ven. 27 juil. 2018 à 00:10, <agrayson2...@gmail.com
    <mailto:agrayson2...@gmail.com>> a écrit :



        On Thursday, July 26, 2018 at 9:59:49 PM UTC, stathisp wrote:


            On Fri, 27 Jul 2018 at 2:08 am, <agrays...@gmail.com> wrote:



                On Thursday, July 26, 2018 at 11:30:11 AM UTC,
                agrays...@gmail.com wrote:



                    On Thursday, July 26, 2018 at 11:24:42 AM UTC,
                    Quentin Anciaux wrote:

                        I still don't get it why some people prefer
                        insulting other people and their ideas
                        instead of discussing or just stay with their
                        own thoughts and just say they disagree...
                        What do you gain by saying they are insane,
                        stupid or whatever?

                        It just looks to me childish. So stop doing
                        this, stop writing in 70pt size red fonts...
                        It's a disfavor to your arguments.

                        Quentin


                    In fact, I DO think it's a mental illness. AG


                It's not just wrong, but a gross dysfunction of
                judgment. Joe the Plumber goes into a lab or his
                closet, shoots a single electron at a slit, and by so
                doing creates uncountable universes, all with copies
                of himself, replete with his memories. Sure. AG


            You may as well protest on the same basis that the
            universe can’t be so wastefully large.


        I don't see how that follows. Unfortunately, one cannot PROVE
        that the many worlds allegedly implied by the MWI
        interpretation don't exist, which is why I insist the True
        Believers are judgment impaired. Do you really believe that
        trivial actions by mere humans, accidents of evolution, can
        create entire universes? AG.



    No, because that's not what happens, at every interactions,
    universes split/differentiate... Humans or not.

    I think that's a misleading way to look at it.  First, the vector
    in Hilbert space representing the state of the universe just
    rotates around. It never "splits". What we refer to as "splitting"
    is the projection onto a plane in the Hilbert space that
    corresponds to a certain "classical" world.  Second, this
    "classical" world plane is not sharply defined.  Almost all
    interactions do not make any difference to it, i.e. they only make
    Planck sized changes to the action and correspondingly tiny tilts
    to the projective plane.  The myriad atomic interactions in your
    body don't make any classical difference.



Yet if QM is the theory of reality, there is no classical world that exists ontologicaly... So makes no difference to who, what?

That the ontology of the world is quantum is a theory.  The theory is derived from and supported by evidence which is stuff experienced by you and me.  Our experience of the world is "classical" (notice I used scare quotes, as I did above).  Bohr was right when he observed that science and knowledge are only possible in a "classical" world; a world in which records exist and observers can agree on them and we do not observe macroscopic superpositions.

Brent
"Epistemology precedes ontology."
        --- terry savage


      Only the few that cause you to take action at the classical level.

    Brent




    Humans have nothing to do in the process.

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