"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
<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
<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.
