On 6/8/2020 7:13 AM, Bruno Marchal wrote:
On 7 Jun 2020, at 12:39, Philip Thrift <[email protected]
<mailto:[email protected]>> wrote:
On Sunday, June 7, 2020 at 5:16:33 AM UTC-5, Bruno Marchal wrote:
But collapsing or not remains relevant, to make sense of the
behaviour of single particle, or more generally to get some
meaning of the relative probabilities, experimentally, or in
arithmetic.
Bruno
There are so many "mechanisms" so many people have come up with over
many decades now to "interpret" these "relative probabilities" that
have been experimentally recored.
Sean Carroll has his "many worlds"
or (another "possibility"):
The offer wave going out in all directions and the many confirmation
waves returning are a sort of subset of the infinite number of
virtual photons traveling all possible paths between emitters and
absorbers in Feynman's "sum-over-paths" path-integral formulation of
quantum mechanics. Kastner proposes to regard the outgoing offer wave
and many incoming confirmation waves as "possible
<https://www.informationphilosopher.com/freedom/possibilism.html>"
transactions, only one of which indeterministically
<https://www.informationphilosopher.com/freedom/indeterminacy.html> becomes
"actual."
Kastner is a possibilist
<https://www.informationphilosopher.com/freedom/possibilism.html> who
argues that OWs and CWs are possibilities that are "real." She says
that they are less real than actual empirically measurable events,
but more real than an idea or concept in a person's mind. She
suggests the alternate term "potentia," Aristotle's that she found
Heisenberg had cited. For Kastner, the possibilities are physically
real as compared to merely conceptually possible ideas that are
consistent with physical law (for example, David Lewis
<https://www.informationphilosopher.com/solutions/philosophers/lewis/>'
"possible worlds." But she says the "possibilities" described by
offer and confirmation waves are "sub-empirical" and
pre-spatiotemporal (i.e., they have not shown up as /actual/ in
spacetime). She calls these "incipient transactions.”
This looks like Popper's propensity. It leads to a dualism (and
indeed, he wrote with Clles a book defending dualism in philosophy of
mind).
I don't see that it entails dualism, even though Popper may have
defended it. Have you read the propensity theory of Paul Humphreys
https://pdfs.semanticscholar.org/57cd/976f12b84c660a78d21c3cd207530a7fd82d.pdf
or the book "Causality" by Judea Pearl, which takes similar approach to
inference?
Brent
It is conceptually more simple to consider an actuality as a possible
seen from inside. Now, here, today are already indixicals,making sense.
That fits with the overall “everything is simpler than any thing”
philosophy of this list, and is made obligatory with mechanism, except
for adding ad hoc complexity or conspiracy à la Bostrom. It is
definitely incompatible with Mechanism + very weak version of Occam Razor.
Bruno
...
https://www.informationphilosopher.com/solutions/scientists/kastner/
<https://www.informationphilosopher.com/solutions/scientists/kastner/#:~:text=Ruth%20Kastner%20is%20a%20physicist,possibilist%20extension%20of%20John%20G.&text=Cramer%20has%20explored%20the%20radical,backwards%20in%20time%20(retrocausality).>
@philipthrift
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