Pigliucci's article is a poor one IMO. I would probably have asked him about a premise to a different argument for panpsychism (which he doesn't address in the article). The assumption is that consciousness does not admit of degree, is not a vague concept. I would ask something along the lines of
'Does the concept of phenomenal consciousness admit of degree? Can a being be in a state in which it is indeterminate as to whether it is conscious or not (compare baldness)?'
To address some of what he says in the article:
panpsychism seems to me both entirely unhelpful and a weird throwback to the (not so good) old times of vitalism in biology. — Pigliucci
No modern panpsychist I'm aware of is motivated by a liking of vitalism.
Nagel, therefore, saw panpsychism as possibly “the last man standing” on the issue, winning by default, though it isn’t clear why what is essentially an argument from ignorance (science at the moment hasn’t the foggiest about how consciousness emerges when matters organizes in certain ways, therefore science will never know) should carry any weight whatsoever. — Pigliucci
Winning by default is not the same thing as an argument from ignorance.
Either A B or C.
Not A
Not B
Therefore C
Where there is no consensus, it is perfectly rational to settle on the least problematic theory, whatever that happens to be. As Churchill said, panpsychism is the worst theory of consciousness apart from all the others.
Does that mean that the iPad on which I’m typing this is (partially) conscious? What about the coffee that I just drank as part of my morning intake of caffeine? What about every single atom of air in my office? Every electron? Every string (if they exist)? — Pigliucci
These are good questions from Pigliucci.
Okay, then, let us consider the “genetic argument” first. The “ex nihilo, nihil fit” bit is so bad that it is usually not taken seriously these days outside of theological circles (yes, it is a standard creationist argument!). If we did, then we would not only have no hope of any scientific explanation for consciousness, but also for life (which did come from non-life), for the universe (which did come from non-universe or pre-universe), and indeed for the very laws of nature (where did they come from anyway?). — Pigliucci
I share Pigliucci's view here of the inadequacy (as he quotes it) of this argument. However just pointing out that emergence happens in general is not enough to show that consciousness specifically can emerge from brain function. Every case of putative emergence must be judged on its own merits, and there are reasons why the emergence of consciousness is particularly problematic.
Surely. I’m not positive if my physicist friends would agree that physics is the study of structural form but not content — whatever those two terms actually mean in this context. But if so, then this is simply an argument for the incompleteness, as a science, of fundamental physics. Which, of course, is why we have a number of other sciences that study “content,” chiefly — in the case of consciousness — biology. — Pigliucci
I don't think he has grasped Eddington and Russell's ideas here, but I'm not totally sure I have either, so I'll just move on.
Consciousness, so far as we know, is an evolved property of certain kinds of animal life forms equipped with a sufficiently complex neural machinery. There is neither evidence nor any reason whatsoever to believe that plants or bacteria are conscious, let alone rocks, individual molecules of water, or atoms. — Pigliucci
This is just philosophical ignorance, unfortunately.
Moreover, since at the very bottom matter dops not seem to be made of discrete units (there are no “particles,” only wave functions, possibly just one wave function characterizing the entire universe), it simply isn’t clear what it means to say that consciousness is everywhere. Is it a property of the quantum wave function? How? Can we carry out an experiment to test this idea? — Pigliucci
These are good questions to ask the panpsychist.
I am left with just one question: why would anyone take any of this seriously at all? — Pigliucci
Because there are reasons Pigliucci has not engaged with.
I get it, panpsychism allows us to feel at one with nature because consciousness is everywhere, and that will make us better shepherds of nature itself. — Pigliucci
This observation is philosophically irrelevant, even if true (which it isn't - it's perfectly possible to be a panpsychist and not care one whit for vegetable and mineral welfare.)
I got news: Nature is mind bogglingly bigger than humanity, and it will be here for eons after humanity will be gone. — Pigliucci
Who is he talking to? Who doesn't know this?
Pigliucci has made a whole lot of assumptions about panpsychists ('New Agers') rather than engaging with panpsychism as a philosophy.