Ren said:But it seems to me, in any case, that the label neutral monism (especially monism) is indeed somewhat misleading here, given that you are willing to make room for property dualism at the very least.
Rewriting this again slightly: I think this once again comes down to the fact that monism could refer to monism about fundamental properties, not all properties. After all, the goal of ontology could easily be seen to find the fundamental properties, as they explain all others by definition. I've been very clear that I mean the fundamental kind, by repeatedly specifying that I formulate physicalism as the thesis that all properties follow from the physical ones for free.
On mathematical properties, I'm sort of unsure if the word emergent is just getting in the way, so let's say what's being claimed is they're higher level. That is, physical objects have a mathematical structure, but other things could have the same mathematical structure. So the mathematical structure is less specific than the full physical properties, which imply the mathematical structure (all this is saying is that it's more specific to say in E=MC^2 that E refers to energy and M to mass than to merely talk of a mathematical equation of that form).
The significance of this, to reiterate, is that experiences could also be less specific -- maybe, as you said, there could be angels or unembodied experiences. This would suggest that, if physicalism is true of our experiences, then the experiences themselves could perhaps have been those of, say, those unembodied minds. Just as something else could have the mathematical structure of the particles of my body-brain, something else maybe could have the same experiences, so my experiences underspecify the facts about my body/brain.
Parsimony -- I don't think we get to choose if all the properties happen to be of one type! If all can be explained by the existence of one type, that's already pretty good, I think, and even that, we can't necessarily ask of the universe.
However, I actually think it's quite questionable if a view with nonphysical properties is at all less parsimonious if e.g. we accept that they may be nonphysical in virtue of this nonspecificity thing. That is, if we've instantiated something that necessarily has a certain mathematical structure, we've accounted entirely for the existence of the mathematical structure. In this sense, the M properties are implied by the P properties, yet the M properties aren't identical to the P ones because they're not specific enough -- just any old thing that is essentially described by the same mathematics as our laws of physics simply isn't necessarily physical!
Leap of faith -- here I confess to not knowing what you mean, and I'm very skeptical this is a problem with the view. Any view on consciousness is a guess at this point, so that's a nonstarter. If what you mean is we have no idea what the hell NEUTRAL crap is, that's fine, but it's again no argument against the view, as it seems one could uncover that neutral properties are fundamental on logical grounds without being able to specify much about what specific laws hold of them. That is, one may conclude it is logically impossible, based on all the metaphysical arguments available, to bridge the metaphysical gap between the public and the private by reducing one to the other, and also conclude against dualism varieties on the usual views about the causal impotence of the mental, or some more sophisticated version of that point, and thus conclude in favor of a neutral view on totally rational grounds with no commitment to how much further can be known about them. This does *not* mean the conclusion that the fundamental properties are neutral is a leap in and of itself! It also doesn't mean I see a straightforward conclusion to the neutral at this time.
Maybe we won't develop knowledge of these properties as well as we have developed scientific knowledge, but again, is that a complaint against the plausibility of the view or merely a wish we aren't doomed to failure? I think it can only be the latter! However, even that complaint doesn't follow, as who says we can't uncover these neutral properties with the same success of science? That might require some argument about cognitive limitation, etc.
Maybe the question I want to ask is --- do you actually see any better alternatives? I don't, personally -- I bet I could attack virtually any alternative at least as well as someone could attack this one.
My attitude is simply that we don't know which one is true, but among the crapshoots I doubt there are much stronger guesses. I do think there are several good guesses, not just one.
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