Here's the first article I've seen that discusses the possibility of determining whether alternate universes might exist. It still seems a reach.
In mathematics, a dynamical system might proceed to evolve along alternate paths at points of bifurcation. But what happens in math may be mere fiction in the physical world. — jgill
"Metaphysicians want to know what the world is like, and tend to ask questions about what sorts of things exist (e.g. are there numbers?), as well as what sorts of things are fundamental [nature of reality](e.g. is everything made of simple elements?). "
https://philpapers.org/browse/metaphysics — Jackson
I think that metaphysics, whatever meaning you give to it, has the defect of being bound to being: in certain contexts it is almost a synonim of ontology. The consequence of being bound to being is that it ignores time and subjectivity. — Angelo Cannata
Along history metaphysics was criticized by historicists, because, by trying to understand how things are, it looses sight of the fact that things, rather than being, are becoming (Heraclitus). — Angelo Cannata
In other words, it seems to me that metaphysics just lack self-criticism. — Angelo Cannata
Here's the first article I've seen that discusses the possibility of determining whether alternate universes might exist. It still seems a reach.
In mathematics, a dynamical system might proceed to evolve along alternate paths at points of bifurcation. But what happens in math may be mere fiction in the physical world. — jgill
The idea of the multiverse is what I think possible worlds refers to. There is no universe, just multiple universes. — Jackson
In my understanding, possible worlds are different from the multiverse. Possible worlds are metaphysical entities while the multiverse is, at least purportedly, science. It is also my understanding that neither possible worlds nor a multiverse associated with quantum mechanics are even theoretically observable. A multiverse associated with cosmic inflation may be. — T Clark
A possible world is a logical structure, so a multiverse would qualify. — Jackson
From what I've seen, multiverses are proposed as physically existent entities, not logical ones. If a parallel universe is not physically observable, one of three conditions apply 1) It is metaphysics and useful, 2) It is metaphysics and not useful, or 3) It is meaningless. In my understanding, multiverses associated with quantum mechanics are not even theoretically observable. — T Clark
I don't agree. — Jackson
If we say there is one universe we have to explain why there is nothing which unifies that reference other than 'all that exists.' — Jackson
So, I would say: if you suppose, for example, that the moon is a planet, just to see how this idea works in comparison to the results coming from observation through technical instruments, then “the moon is a planet” is a scientific hypothesis, which means, there is no intention to make it the ultimate, fundamental system of ideas about the moon.
If you say “the moon is a planet” with the intention to build an assertion that should resist to any criticism, any objection, any doubt, so that, if different conclusions come from observation, we should think that most probably observation is wrong, then you are trying to build metaphysics. — Angelo Cannata
The aim of metaphysics is to go beyond physics, beyond science — Angelo Cannata
I am interested in seeing how it is not true, according to what philosophers. — Angelo Cannata
The aim of metaphysics is to go beyond physics, beyond science
— Angelo Cannata
That is just not true. — Jackson
“In seeking a comprehensive account of everything, metaphysics is continuous with science, going beyond particular scientific theories.”
(Metaphysics of science between metaphysics and science, Michael Esfeld) — Joshs
You can have a look here, as an example. — Angelo Cannata
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