Where did I use the word "never"?
Is it your contention that every possibility must be realized, in which
case "possibility" loses all meaning and might as well be replaced by
reality.
Brent
On 8/25/2025 1:34 PM, Quentin Anciaux wrote:
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
<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
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