If you claim possibilities “objectively exist” but are never realized, you’re redefining “existence” into something empty. An "objective" possibility with no ontological counterpart is indistinguishable from non-existence.
All those moments will be lost in time, like tears in rain. (Roy Batty/Rutger Hauer) Le lun. 25 août 2025, 21:50, Brent Meeker <[email protected]> a écrit : > "Correspond" is a weak word. An expectation corresponds to the thing > expected. And the expectation is real. But it doesn't follow that the > thing expected is realized. Possibility is not equivalent to reality. > > Brent > > On 8/25/2025 12:14 PM, Quentin Anciaux wrote: > > Brent, > > Saying that a possibility "objectively exists" but does not correspond to > any reality is paradoxical. Either it exists, in which case it is part of > reality, or it doesn’t, in which case it’s not an objective possibility. > > Quentin > > > > All those moments will be lost in time, like tears in rain. (Roy > Batty/Rutger Hauer) > > Le lun. 25 août 2025, 20:40, Brent Meeker <[email protected]> a > écrit : > >> >> >> On 8/25/2025 12:04 AM, smitra wrote: >> >> But then one is defining "this universe" post hoc after the photon lands >> on some point on the screen. One can do that, but this means that there are >> two possibilities that really exist. Whether that's considered to be in a >> single universe or two universes is just semantics. There are two classes >> of paths for the photon, one class is the set of paths through one slit, >> the other are the paths through the other slit. >> >> Given that's the case, we can then do another measurement where we simply >> measure through which slit the photon goes. We then don't bother to let the >> photon move through toward the screen anymore, we just detect the outcome >> of measuring whether the photon after moving past either slits ends up >> being detected immediately after the left or the right slit. >> >> If I then perform one such measurement, and I decide to go on vacation >> destination X if the photon is detected behind the left slit and I go to >> vacation destination Y if the result is the right slit, and I end up going >> to X, the question is if there exists a parallel world where I go to Y. >> >> The question for people who would say that only one world where I go to X >> exists, is then to explain why both possibilities for the photon going to >> the left or right slit objectively exists when we detect the photon only at >> the screen, but only one possibility exists when we detect the photon >> directly after passing the slits. >> >> The answer is, Don't confound possibility with reality. Possibilities >> "objectively exist" doesn't mean the corresponding realities exist. When >> you measure at one slit there is a different reality than when measuring at >> the screen. >> >> Brent >> >> >> Saibal >> >> >> >> On 18-08-2025 21:56, Brent Meeker wrote: >> >> Whatever goes thru the other slit to create the cancellation is doing >> it in the same universe; and incidentally it also increases the >> incidence at other points. So I don't see that it implies a parallel >> universe. >> >> Brent >> >> On 8/17/2025 10:31 AM, smitra wrote: >> >> See here: >> >> https://www.youtube.com/watch?v=bux0SjaUCY0&t=885s >> >> Of course, you can never get to 100% rigorous proof in physics like >> in mathematics. You can never rule out waking up tomorrow in some >> alien world and aliens telling you that your life here on Earth was >> a simulation and that everything you thought you knew about the laws >> of physics is false. >> >> The nice thing about the argument by Deutsch is that it doesn't >> depend on QM being correct, it is based on interpreting the >> interference experiment. So, QM could be wrong, or it could be that >> some of the claims of the MWI proponents are wrong, and yet this >> argument by Deutsch will still stand. >> >> Saibal >> >> >> -- >> 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 visit >> >> https://groups.google.com/d/msgid/everything-list/a1de5682-0789-4d6d-8794-28d553b68979%40gmail.com >> [1]. >> >> >> Links: >> ------ >> [1] >> >> https://groups.google.com/d/msgid/everything-list/a1de5682-0789-4d6d-8794-28d553b68979%40gmail.com?utm_medium=email&utm_source=footer >> >> >> >> -- >> 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 visit >> https://groups.google.com/d/msgid/everything-list/8ad48823-1135-483b-90fe-b9249c3257c1%40gmail.com >> <https://groups.google.com/d/msgid/everything-list/8ad48823-1135-483b-90fe-b9249c3257c1%40gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > 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 visit > https://groups.google.com/d/msgid/everything-list/CAMW2kArVxEco-aY%3D0xw1ktADavpJvwbhaXMgNrXUFBupQJCxyA%40mail.gmail.com > <https://groups.google.com/d/msgid/everything-list/CAMW2kArVxEco-aY%3D0xw1ktADavpJvwbhaXMgNrXUFBupQJCxyA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- > 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 visit > https://groups.google.com/d/msgid/everything-list/09f1e290-9a15-4e11-adc7-3fb43fe7bbbe%40gmail.com > <https://groups.google.com/d/msgid/everything-list/09f1e290-9a15-4e11-adc7-3fb43fe7bbbe%40gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Everything List" group. 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