davidm wrote: ↑Tue Jul 11, 2017 10:02 pmNothing in the two-slit experiment entails any logical impossibility, so this would not fit his criterion. Two-slit just shows that the universe is really,
really weird — much weirder than we had ever suspected. It also shows we don’t really grasp the ontology of the universe — whether it is collapse or no-collapse. It can’t be both, but we have no empirical way currently to decide between these two interpretations.
Well, collapse or no-collapse is epistemological, in my view; it's a mathematical model, after all. The ontology is what it is; whether we can ever grasp the ontology of the universe, is a moot point, but we can certainly grasp the ontology of the versions of quantum mechanics that have one, the different quantum field theories, for example. In that context, the universe isn't nearly so weird as classical assumptions would have us believe.
The thing with Immanuel Can, is that his understanding of logic doesn't really extend beyond scholasticism; you may have noted the appeals to Plantinga, rather than any exposition. He's very keen on the law of the excluded middle, for example, which is a problem from an ontological point of view.
davidm wrote:I Can would do well to really study modal logic — because it could actually help at least some of his arguments.
I think it unlikely that he will take you up on that. He has a narrative that is cobbled together from the less abstruse blatherings of William Lane Craig, Alvin Plantinga and a bunch of even lighter weight pop-apologists. In fairness, it is, on the face of it fairly coherent, in the way that valid arguments founded on unsound premises often are. He wants to believe it. It makes sense to him. If it ain't broke; don't fix it.
davidm wrote:Modal logic deals with possible worlds, which means logically possible worlds.
I'm no logician, but I get that much.