You need to start trying to grasp my reasons for considering physicalism, as I described above, instead of attacking a strawman. There are no facts about dark matter and energy to be accounted for. With regard to QM: there is no fact regarding which interpretation is correct. An interpretation is a metaphysical hypothesis, and physicalism is consistent with most of them. — Relativist
I'm not attacking a strawman - you’re treating “the facts of science” as if they were metaphysically transparent, a window to 'how the universe truly is', when they are plainly not. You say physicalism is the “inference to best explanation” from all the facts. Yet what counts as fact in science is already theory-laden. Quantum mechanics provides experimental regularities, but the interpretations of what those regularities
mean about reality are metaphysically contested. To say physicalism is “consistent with most interpretations” is just to admit that physics itself doesn’t decide the metaphysical question.
And then there’s the incompleteness issue. Even if you bracket dark matter and energy, you’re still working with a framework that according to its own posits provides for only a minute percentage of the totality of the cosmos and leaves many questions about it own foundations unresolved. How can that be invoked as the basis of a metaphysics as 'first philosophy', when it is plainly contingent in nature.
There are academics and scientists, some of whom say that quantum physics proves that the
universe is mental, others who claim that it shows there are
infinitely many worlds, and yet others who say that
quantum physics is simply wrong. So if physicalism is consistent with wildly divergent interpretations of what physics means, how could it be meaningful?
you reject the account I've given that universals exist immanently. — Relativist
You say universals “exist immanently as constituents of states of affairs.” But what does that really mean? If I say “this apple is larger than that plum,” the 'larger than relation' is not something you can isolate in either piece of fruit. It’s not inherent in either object, but grasped by an intellect making the comparison.
That’s why I say such relations are not “immanent” in objects but imputed to them by reason. They are formal judgements. Armstrong’s ontology tries to locate them in the furniture of the world, without acknowledging that they are in a fundamental sense dependent on the mind which recognises them.
I GAVE you an opening, by admitting there's an issue with the "hard problem", so that I was willing to entertain the "negative fact" (actually a negative hypothesis) that there's something about the mind that is non-physical. — Relativist
You say I've been vague, but I’ve been quite explicit. Let me spell it out.
First: the hard problem, as Chalmers framed it in his original paper, is about experience. There is information-processing in the brain, but there is also the first-person, subjective aspect — what Nagel called something it is like to be a conscious organism. That “what-it-is-like” is experience, and objective, third-person accounts don’t capture it:
RevealThe really hard problem of consciousness is the problem of experience. When we think and perceive, there is a whir of information-processing, but there is also a subjective aspect. As Nagel (1974, 'What is it Like to be a Bat') has put it, there is something it is like to be a conscious organism. This subjective aspect is experience. When we see, for example, we experience visual sensations: the felt quality of redness, the experience of dark and light, the quality of depth in a visual field. Other experiences go along with perception in different modalities: the sound of a clarinet, the smell of mothballs. Then there are bodily sensations, from pains to orgasms; mental images that are conjured up internally; the felt quality of emotion, and the experience of a stream of conscious thought. What unites all of these states is that there is something it is like to be in them. All of them are states of experience. — David Chalmers, Facing Up to the Problem of Consciousness
Second: this stems from the constitution of modern science since Galileo, which gave primary reality to the measurable, objective domain and relegated how phenomena appear in experience to the secondary domain of the subjective. Physicalism inherits this stance, but in doing so it excludes something very obvious: the subject
to whom a theory is meaningful, the very mind that provides the definitions and draws the conclusions (which, incidentally, is also what shows up in 'the observer problem' in quantum physics.)
Third: The problem is that you can only conceive of what is not physical as a 'non-physical thing'. You request 'evidence' of 'some non-physical thing', but that is because of the objectivism that is inherent in the physicalist attitude. The 'non-physical' is not 'out there somewhere', it is in the way the mind
constructs a coherent and unified world from the disparate elements of science, sense-data and judgement. This insight is, of course, fundamental to Kant, and was developed further by phenomenology.
So: the mind is not outside the physicalist scope because it’s a spooky Cartesian “thinking thing” or ghost in the machine. It’s excluded because it is not an object of cognition at all, but the seat of cognition — the condition that makes objects intelligible in the first place. Demanding “evidence of a non-physical thing” only shows how objectivism presupposes what it cannot see. This is why Kant, and later phenomenology, makes the constitutive role of mind explicit. Physicalism of Armstrong's variety methodically screens this out, or ignores this fundamental fact. Hence the critique given in '
The Blind Spot of Science'.
So I don't accept that these are vague arguments. Perhaps you might actually address them.