Five Proofs around the net

Strange Notions has kindly hosted a Q and A on my book Five Proofs of the Existence of God (which you can order either from Amazon – though they are temporarily out of stock – or directly from Ignatius Press).  They chose ten of the questions submitted and have now posted my responses.  Among the topics that arise are the nature of proof, polytheism, divine simplicity, and the relationship between Thomism and idealism.

Part II of the two-part interview on the book I recently did for The Patrick Coffin Show has now been posted (and can be viewed either at Patrick’s website or at YouTube).  This part is a Q and A session with the audience.  Among the topics that arise are Thomas Nagel, process theology, the problem of evil, and invincible ignorance.

I am overworked, therefore I link

Physicist Lee Smolin and philosopher Roberto Unger think that physics has gotten something really important really wrong.  NPR reports.

The relationship between Aristotelian hylemorphism and quantum mechanics is the subject of two among a number of recent papers by philosopher Robert Koons.

Hey, he said he would return.  At Real Clear Defense, Francis Sempa detects a revival of interest in General Douglas MacArthur.  The New Criterion reviews Arthur Herman’s new book on MacArthur, while the Wall Street Journal and Weekly Standard discuss Walter Borneman’s new book.

At The Catholic Thing, Matthew Hanley discusses Dario Fernandez-Morera’s book The Myth of the Andalusian Paradise: Muslims, Christians, and Jews under Islamic Rule in Medieval Spain.

Around the web

Was the twentieth-century Thomist Reginald Garrigou-Lagrange unduly influenced by Leibnizian rationalism, as followers of Etienne Gilson often allege?  No, argues Steven Long, over at Thomistica.net.  (Be sure to read the discussion in the comments section as well as the original post.)

The debate over Thomas Nagel’s Mind and Cosmos never ends.  Raymond Tallis reviews the book in The New Atlantis, and Jim Slagle reviews it for Philosophy in Review.

You’ve read Sean Howe’s Marvel Comics: The Untold Story and checked in regularly at its companion blog.  Now brace yourself for Blake Bell and Michael J. Vassallo’s The Secret History of Marvel Comics, which has a blog of its own.  It’s a look at the seamier, pulp magazine side of the company’s early history.

The return of final causality

I commend to you the late historian of philosophy Paul Hoffman’s paper “Does Efficient Causation Presuppose Final Causation?  Aquinas vs. Early Modern Mechanism.”  The paper appeared in the 2009 volume Metaphysics and the Good: Themes from the Philosophy of Robert Merrihew Adams, edited by Samuel Newlands and Larry Jorgensen, and I am pleased to find that it is available online.  It is part of a growing number of works by contemporary thinkers outside the Thomistic orbit which sympathetically reconsider or even defend (as Hoffman does) something like an Aristotelian conception of teleology.

Eliminativism without truth, Part I

Suppose you hold that a good scientific explanation should make no reference to teleology, final causality, purpose, directedness-toward-an-end, or the like as an inherent and irreducible feature of the natural order.  And suppose you hold that what is real is only what science tells us is real.  Then you are at least implicitly committed to denying that even human purposes or ends are real, and also to denying that the intentionality of thought and the semantic content of speech and writing are real.  Scientism, in short, entails a radical eliminativism.  Alex Rosenberg and I agree on that much -- he defends this thesis in The Atheist’s Guide to Reality and I defend it in The Last Superstition.  Where we differ is over the lesson to be drawn from this thesis.  Rosenberg holds that scientism is true, so that eliminativism must be true as well.  I maintain that eliminativism is incoherent, and constitutes a reductio ad absurdum of the scientism that leads to it.  I responded to Rosenberg at length in a series of posts on his book.

In his paper “Eliminativism without Tears,” Rosenberg attempts in a more systematic way than he has elsewhere to respond to the charge of incoherence.  Rosenberg kindly sent me this paper some time ago, and I note that it is now available online.

Around the web

Metaphysician E. J. Lowe discusses ontology, physics, Locke, Aristotle, logic, laws of nature, potency and act, dualism, science fiction, and other matters in an interview at 3:AM Magazine. 

Over at The Montreal Review, Alex Sztuden responds to Leiter and Weisberg’s review of Thomas Nagel’s Mind and Cosmos.

Frank Beckwith replies to David Bentley Hart on natural law in The Catholic Thing.

Rosenberg roundup

Having now completed our ten-part series of posts on Alex Rosenberg’s The Atheist’s Guide to Reality, it seems a roundup of sorts is in order.  As I have said, Rosenberg’s book is worthy of attention because he sees more clearly than most other contemporary atheist writers do the true implications of the scientism on which their position is founded.  And interestingly enough, the implications he says it has are more or less the very implications I argued scientism has in my own book The Last Superstition.  The difference between us is this: Rosenberg acknowledges that the implications in question are utterly bizarre, but maintains that they must be accepted because the case for the scientism that entails them is ironclad.  I maintain that Rosenberg’s case for scientism is completely worthless, and that the implications of scientism are not merely bizarre but utterly incoherent and constitute a reductio ad absurdum of the premises that lead to them.

Some brief arguments for dualism, Part III

In the previous post in this series, I argued that the “mechanistic” conception of the natural world adopted by the early modern philosophers more or less entails a kind of dualism insofar as its banishment of final causes from the material world effectively makes intentionality necessarily immaterial. Intentionality, of course, is one of two features of the mind to which contemporary philosophers of mind have paid special attention. The other is consciousness, and in particular the “qualia” that are said to make consciousness uniquely difficult to explain in material terms. There is a good reason for this difficulty – indeed, impossibility – and it is the same reason why intentionality is impossible to explain in materialistic terms. It lies in the mechanistic conception of matter itself.

The early modern philosophers and scientists were obsessed with quantification. There were several reasons for this, one of them being their desire to reorient intellectual efforts toward the improvement of life in this world and away from the otherworldliness of the ancients and medievals. This entailed a new emphasis on technology and more generally on the control and exploitation of the natural world in the interests of bettering man’s material condition. Since quantification would facilitate this, those aspects of nature that could be described in purely mathematical terms took on a special importance, and those which could not came to seem, from the point of view of this new, worldly approach to learning, irrelevant at best and a distraction at worst. Thus did final causes, hidden powers, substantial forms and the like go out the window. So too did the qualitative aspects of nature. Colors, odors, tastes, feels, sounds, and the like, at least as understood by common sense, vary from observer to observer – think of old philosophical chestnuts like the room temperature water that feels warm to one hand and cool to the other, colorblindness, and so forth – making them a poor fit for a science looking to make nature subject to human prediction and control. Out the window with them too, then. The physical world would be redefined as comprised of colorless, odorless, tasteless particles in motion; and color, temperature, and the like would be redefined entirely in terms of the quantifiable relations holding between these particles (e.g. heat and cold in terms of molecular motion). What about color, odor, taste, and so forth as common sense understands them? They in turn were redefined as entirely mind-dependent “secondary qualities” (or rather, ideas of secondary qualities), the ancestors of the contemporary philosopher’s concept of qualia. On the view in question, they do not exist in the physical world as it is in itself, but only in our perceptual representation of that world.

It should be obvious, then, how, as with intentionality, the notion that qualia are incapable of materialistic explanation is not some desperate attempt to avoid the implications of modern science, but is rather precisely a consequence of modern science. The mechanistic conception of matter that underlies science (or rather underlies what, since the 17th century, is allowed to count as science) itself entails that qualia (as we call them today) are immaterial or non-physical. Many early modern thinkers – Descartes, Cudworth, and Locke, for example – saw this, which is part of the reason they were dualists. Given the mechanistic conception of matter, these thinkers concluded that “secondary qualities,” “sensory qualities,” “qualia,” or whatever else you want to call them are necessarily immaterial, precisely because matter got (re)defined by the mechanical philosophy by contrast with these qualities.

Some contemporary naturalists – Joseph Levine, Thomas Nagel, and John Searle, for example – have more or less recognized this, acknowledging that there is nothing more to the contemporary materialist’s concept of matter (which derives from the 17th century “mechanical” conception) other than its contrast with the “qualitative” (and intentional) features of our experience of the world. Precisely for this reason, all three of these thinkers have (in their different ways) regarded modern materialism as deeply conceptually problematic, though they have also stopped short of embracing dualism. But other contemporary naturalists – Dennett and the Churchlands, for example, not to mention countless lesser lights of the sort who write crude atheist pamphlets and pop neuroscience books – cluelessly suggest that there is no good reason to think that the mind will fail to yield to the same sort of reductive explanation in terms of which everything else in nature has been accounted for.

In fact there is a very good reason why the mind should be uniquely resistant to such “explanation,” and it precisely because everything that doesn’t fit the mechanistic-cum-quantificational picture of the natural world has not been “explained” by science at all, but simply swept under the rug of the mind and treated as a mere “projection.” This is true in particular of anything in nature that seems to smack of final causality or to have an irreducible qualitative (as opposed to quantitative) character. It is conceptually impossible that the mind itself should be “explained” in the same way – that is to say, by further sweeping – which is why modern philosophy has a “mind-body problem” of a sort that did not exist before the mechanistic revolution, and why all materialist attempts to “explain” the mind are really disguised versions of eliminative materialism. The tiresome canard that “everything else has already been explained in materialistic terms” is thus a gigantic shell game, pure sleight of hand, a complete fraud from start to finish. (This is a theme I first explored in my book Philosophy of Mind and develop at length in The Last Superstition.)

In any case, we have now a third brief argument for dualism, which can be summarized as follows: Given the materialist’s own (mechanistic-cum-quantificational) conception of matter, colors, odors, tastes and the like as we experience them do not exist in the material world itself; but these qualities do exist in our perceptual representations of the material world; therefore, there exist features of the world – namely these sensory qualities or “qualia” that characterize our perceptual experiences – that are not material or physical features.

Obviously this argument raises questions about how these immaterial features relate to the material ones – Are they basic or emergent? How can they causally interact with the material ones? Do they inhere in a physical or a non-physical substance? – but the fact that it raises them has no bearing on the cogency of the argument itself. My own view is that the standard (Cartesian) dualist answers to such questions are problematic precisely because they buy into the same mechanistic conception of matter to which materialists are beholden. The right approach is to challenge that conception of matter, and return to the Aristotelian-Scholastic picture it replaced. But whether I am right about this or not is also irrelevant to the argument just given, which does not assume any Aristotelian-Scholastic premises, but simply draws out the consequences of the very conception of matter to which materialists themselves are committed. Whatever the deficiencies of Cartesian dualism, they do not approach the sheer incoherence and cluelessness of contemporary materialism.

Mad dogs and eliminativists

As an epilogue to my critique of Alex Rosenberg’s paper “Eliminativism without Tears,” let’s take a brief look at Rosenberg’s recent interview at 3:AM Magazine.  The interviewer styles Rosenberg “the mad dog naturalist.”  So perhaps in his bid to popularize eliminative materialism, Rosenberg could put out a “Weird Al” style parody of the old Noël Coward song.  Or maybe he and fellow eliminativist Paul Churchland could do a re-make of ZZ Top’s classic Eliminator album.  Don’t know if they’re sharp-dressed men, but they’ve got the beards.  (I can see the video now: The guys, electric guitars swaying in unison and perhaps assisted by Pat Churchland in a big 80s hairdo, set straight some benighted young grad student who still thinks the propositional attitudes are worth salvaging.  Romance ensues, as does a job at a Leiter-ranked philosophy department…)

Noë on the origin of life etc.

UC Berkeley philosopher (and atheist) Alva Noë is, as we saw not too long ago, among the more perceptive and interesting critics of Thomas Nagel’s Mind and Cosmos.  In a recent brief follow-up post, Noë revisits the controversy over Nagel’s book, focusing on the question of the origin of life.  Endorsing some remarks made by philosopher of biology Peter Godfrey-Smith, Noë holds that while we have a good idea of how species originate, there is no plausible existing scientific explanation of how life arose in the first place:

This is probably not, I would say, due to the fact that the relevant events happened a long time ago.  Our problem isn't merely historical in nature, that is.  If that were all that was at stake, then we might expect that, now at least, we would be able to make life in a test tube.  But we can't do that.  We don't know how.

Mind-body problem roundup

For readers who might be interested, I thought it would be useful to gather together in one place links to various posts on the mind-body problem and other issues in the philosophy of mind.  Like much of what you’ll find on this blog, these posts develop and apply ideas and arguments stated more fully in my various books and articles.  Naturally, I address various issues in the philosophy of mind at length in my book Philosophy of Mind, of which you can find a detailed table of contents here.  (The cover illustration by Andrzej Klimowski you see to the left is from the first edition.)  You will find my most recent and detailed exposition of the Aristotelian-Thomistic (A-T) approach to issues in the philosophy of mind in chapter 4 of Aquinas.  There is a lot of material on the mind-body problem to be found in The Last Superstition, especially in various sections of the last three chapters.  And there is also relevant material to be found in Locke, in the chapter I contributed to my edited volume The Cambridge Companion to Hayek, and in various academic articles.

Scientism roundup

In several recent posts we have dealt at least indirectly with scientism, the view that the only real knowledge is scientific knowledge.  Scientism is an illusion, a bizarre fantasy that makes of science something it can never be.  Seemingly the paradigm of rationality, it is in fact incoherent, incapable in principle of being defended in a way consistent with its own epistemological scruples.  It should go without saying that this in no way entails any criticism of science itself.  For a man to acknowledge that there are many beautiful women in the world does not entail that he doesn’t think his own wife or girlfriend is beautiful.  Similarly, to say that there are entirely rational and objective sources of knowledge other than science does not commit one to denying that science is a source of knowledge.  Those who cannot see this are doubly deluded – like a vain and paranoid wife or girlfriend who thinks all women are far less attractive than she is and regards any suggestion to the contrary as a denial of her own beauty.  Worse, like an already beautiful woman whose vanity leads her to destroy her beauty in the attempt to enhance it through plastic surgery, scientism threatens to distort and corrupt science precisely by exaggerating its significance.

The trouble with William Paley

In The Last Superstition and elsewhere, I have been very critical of both William Paley of “design argument” fame and of contemporary Intelligent Design theory. These criticisms have had nothing whatsoever to do with a desire to conform to Darwinian orthodoxy. They have had to do instead with a rejection of the most basic metaphysical and methodological assumptions underlying by the “design inference” strategy shared by Paley and ID theorists. (I am aware that not all ID theorists are trying to do exactly what Paley was doing. But the differences are irrelevant, because what I object to is what they have in common.)

The problems are twofold. First, both Paleyan “design arguments” and ID theory take for granted an essentially mechanistic conception of the natural world. What this means is that they deny the existence of the sort of immanent teleology or final causality affirmed by the Aristotelian-Thomistic-Scholastic tradition, and instead regard all teleology as imposed, “artificially” as it were, from outside. I devoted a couple of recent posts to explaining in some detail the differences between these approaches to teleology (here and here). And I emphasized that one of the objections the Aristotelian-Thomistic (A-T) tradition has to the mechanistic denial of final causality is that it makes efficient causality unintelligible. Causes and effects become “loose and separate”; any effect or none might in principle follow upon any cause. This not only paves the way for the paradoxes of Hume, but (more to the present point) undermines the possibility of showing how the very fact of causation as such presupposes a sustaining First Uncaused Cause. The metaphysically necessary connection between the world and God is broken; in principle the world could exist and operate just as it does apart from God. The most we can say is that this is so improbable a hypothesis that it can safely be ruled out; for as Paley and Co. assure us, it is far more likely that an extremely powerful and intelligent “designer” put together the “machine” that is the universe.

The second problem is that Paley and Co. conceptualize this designer on the model of human tinkerers, attributing our characteristics (intelligence, power, etc.) to him in a univocal rather than an analogous way (to allude to a crucial Thomistic distinction explained in a previous post). To be sure, “design arguments” also emphasize that the differences between human artifacts and the universe indicate that the designer’s power and intelligence must be far vaster than ours. But we are necessarily left with a designer conceived of in anthropomorphic terms – essentially a human being, or at least a Cartesian immaterial substance, with the limitations abstracted away. The result is the “theistic personalism” (as Brian Davies has labeled it) which has displaced classical theism in the thinking of many contemporary philosophers of religion.

“OK,” you might say, “so the arguments in question do not get us with certainty all the way to the God of classical theism. So they only get us part way, and only with probability. That’s something, isn’t it?”

Well, no, actually it isn’t. Suppose you are a Christian, and suppose I gave you a powerful argument for the existence of Zeus, or of Quetzalcoatl. Would you run out and wave it defiantly in the faces of your New Atheist friends? Presumably not; it would be less a vindication than an embarrassment. To be sure, such an argument wouldn’t necessarily be incompatible with Christianity. You could always interpret Zeus or Quetzalcoatl as merely an unusually impressive created being – a demon, say, or an extraterrestrial. Indeed, that’s how you should interpret them if they are real, because whatever Zeus or Quetzalcoatl would be if they existed, they would not be divine in the classical theistic sense of “divine.” On classical theism, there doesn’t simply happen to be one God, as if only one applicant bothered responding to the "Creator needed; long hours but good benefits" job ad; there couldn’t possibly be more than one God, given what God is. Anything less than Being Itself or Pure Act, anything less than That Than Which No Greater Can Be Conceived, anything less than that which is absolute divine simplicity, absolutely incomparable, would simply not be God. There is no such thing as “almost” being God; it’s all or nothing. But precisely for that reason, while to prove the existence of Zeus or Quetzalcoatl would not be to disprove God’s existence, neither would it advance you one inch to proving it. It would be completely irrelevant.

Same thing with the arguments of Paley and Co. You do not get from them – not one inch, not one degree of probability – to the God of classical theism, of Athanasius, Augustine, Anselm, and Aquinas, of the Creeds and councils of the Church, the “I am who am” of Exodus. What you get instead is something like the Ralph Richardson Supreme Being character from Time Bandits. Really really powerful? – no doubt about it. Super smart too – wouldn’t want to play Trivial Pursuit against him! A snappy dresser. But not God. Because a god apart from whom the world might in theory exist anyway – as a mechanical conception of nature entails – is not, cannot be, the God of classical theism. Nor can a god who is powerful and intelligent in just the way we are, only more so.

Or as the analytical Thomist philosopher Christopher F. J. Martin amusingly puts it in his very fine book Thomas Aquinas: God and Explanations:

The Being whose existence is revealed to us by the argument from design is not God but the Great Architect of the Deists and Freemasons, an impostor disguised as God, a stern, kindly, and immensely clever old English gentleman, equipped with apron, trowel, square and compasses. Blake has a famous picture of this figure to be seen on the walls of a thousand student bedrooms during the nineteen-seventies: the strong wind which is apparently blowing in the picture has blown away the apron, trowel and set-square but left him his beard and compasses. Ironies of history have meant that this picture of Blake’s is often taken to be a picture of God the Creator, while in fact Blake drew it as a picture of Urizen, a being who shares some of the attributes of the Great Architect and some of those of Satan.

The Great Architect is not God because he is just someone like us but a lot older, cleverer and more skilful. He decides what he wants to do and therefore sets about doing the things he needs to do to achieve it. God is not like that. As Hobbes memorably said, "God hath no ends": there is nothing that God is up to, nothing he needs to get done, nothing he needs to do to get things done. In no less lapidary Latin, Aquinas said "Vult ergo Deus hoc esse propter hoc; sed non propter hoc vult hoc". In definitely unlapidary English we could say: The set-up, A-for-the-sake-of-B is something that God wants; but it is not that God wants B and for that reason wants A. We know that the set-up A-for-the-sake-of-B is something that God wants, because it is something that exists, and everything that exists, exists because of God’s will. But it is simply profane to think that you can infer from that the unfathomable secrets of the inside of God’s mind and will. Acorns for the sake of oak trees, to repeat an example of Geach’s, are definitely something that God wants, since that is the way things are. But it is not that God has any special desire for oak trees (as the Great Architect might), and for that reason finds himself obliged to fiddle about with acorns. If God wants oak-trees, he can have them, zap! You want oak trees, you got ’em. "Let there be oak trees", by inference, is one of the things said on the third day of creation, and oak trees are made. There is no suggestion that acorns have to come first: indeed, the suggestion is quite the other way around. To "which came first, the acorn or the oak?" it looks as if the answer is quite definitely "the oak". In any case, what’s so special about oak trees that God should have to fiddle around with acorns to make them? God is mysterious: the whole objection to the great architect is that we know him all too well, since he is one of us. Whatever God is, God is not one of us: a sobering thought for those who use "one of us" as their highest term of approbation.

The argument from design fails, then, because [as Martin argues earlier in the book] it is an argument from ignorance, because it confuses the final and efficient modes of explanation, and because even if it succeeded it would not prove the existence of God but of some Masonic impostor. But like other bad arguments, its defeat and death has left it to wander the world like a ghost, oppressing the spirits of those who are looking for other and better arguments. (pp. 181-2)

Needless to say, to worship Urizen or Ralph Richardson is not to worship God. But then, to devote enormous amounts of energy to defending arguments which could only ever get you to Urizen or Ralph Richardson would seem an odd enterprise for those whose interest is in promoting the worship of God. This is part of the problem with Paley-style “design arguments” and ID theory, at least insofar as the latter is thought to give support to theism. Even if they are successful – and my own view is that they are at least better than Martin gives them credit for – they distract attention from arguments which really do establish the existence of God. Worse, they lead people to a false conception of God – God as an anthropomorphic tinkerer, God as a cosmic Boy Scout or Santa Claus, a god-of-the-gaps, a scientific posit on all fours with quarks and selective pressures.

“But ID arguments raise serious questions about Darwinism!” Maybe so, and that is not unimportant. But my interest here is in the question of what sorts of arguments establish the existence of the God of classical theism. And to challenge Darwinism, even to refute Darwinism, would not be to establish classical theism. Indeed, it would not even be to refute naturalism. For, the pretenses of its less astute advocates notwithstanding, naturalism is a metaphysical theory, not an empirical one; and it is always possible for a naturalist to throw up his hands at Darwinism’s failure to explain this or that, and insist on general metaphysical grounds that there must nevertheless be some other naturalistic explanation or other out there, even if we have not or cannot discover it. That is in effect the approach taken by wiser naturalists – not Darwinian religious fanatics like Dawkins, Dennett, and Co., but more sober and serious theorists like David Stove, Jerry Fodor, Thomas Nagel, and Noam Chomsky, none of whom thinks Darwinism has come anywhere close to a complete naturalistic explanation of biological phenomena.

That is not to say that I think naturalistic metaphysics is believable even for a moment. It isn’t. But the point is that the dispute concerns basic metaphysics, not empirical science. Where the dispute over theism, specifically, is concerned, it is a waste of time to try to beat the naturalists at their own game, viz. empirical theorizing on the basis of a mechanistic conception of nature. That sort of thing will only ever get you at best to very remote, unusual, even extremely unexpected and impressive – but still perfectly natural – phenomena. It will not get you in the slightest toward God, because God is not one natural object among others, not even the most powerful and intelligent natural object, not even an immaterial natural object. (From a Scholastic point of view, “natural” does not entail “material” – angels and demons are immaterial, but still part of the natural, created order. Nor does the entailment seem to hold even from a naturalistic point of view, given e.g. that Quine is perfectly happy to countenance abstract objects if they are necessary to make sense of empirical science.)

The trouble with Paley-style arguments, then, is not that they are bad science – they may or may not be, depending on which ones we are talking about – but that they are bad theology. If you assume otherwise, then perhaps – as J. B. Phillips put it in a different context – your god is too small.

Churchland on dualism, Part II

Let’s continue our look at Paul Churchland’s critical discussion of dualism in his textbook Matter and Consciousness. I have noted that while Churchland neglects even to mention the most important arguments for dualism and devotes space to arguments that dualist philosophers themselves don’t actually put much stock in, he does at least discuss two arguments that many such philosophers do think important: the argument from introspection and the argument from irreducibility.

As Churchland summarizes the argument from introspection, it states that the thoughts, sensations, desires, and emotions we encounter in introspection are just plainly different from electrochemical activity in neural networks. As he summarizes the argument from irreducibility, it states that language, reasoning, the introspectible qualities of sensations, and the meaningful contents of our thoughts cannot plausibly be accounted for in materialist terms; for example, knowledge of the molecular structure of a rose and/or of the brain would not allow a physicist or chemist to predict what it would be like to experience the smell of a rose.

Churchland’s summary of these arguments is superficial. For example, it is clear from his gloss on the argument from irreducibility that he regards Frank Jackson’s famous “knowledge argument” as an important instance of it. Yet he does not actually state Jackson’s argument, thus denying the unwary reader an opportunity to appreciate its full power. (Churchland does briefly discuss Jackson’s argument later in the book, but only after having disposed of dualism and plumped for materialism, thus giving the misleading impression that the argument is merely a puzzle an already-established materialism must solve rather than an independent argument for dualism in its own right.)

Worse than this, though, are the responses he gives to the two arguments in question, which are presented as decisive but are in fact exceedingly feeble. The argument from introspection has no force, Churchland assures us, because introspection cannot be trusted in light of the fact that there are clear cases from the history of science showing that our natural powers of observation have misled us in other domains. What cases are these? “The red surface of an apple does not look like a matrix of molecules reflecting photons at certain critical wavelengths, but that is what it is,” Churchland says; “The sound of a flute does not sound like a sinusoidal compression wave train in the atmosphere, but that is what it is. [etc.]”

The problem with this response should be obvious, at least to someone with knowledge of the history of the mind-body problem and of modern philosophy generally. In particular, there is an obvious reason why the cases Churchland appeals to not only do not make the point he thinks they do, but in fact make the case for dualism even stronger. For the reason the identities in question – red with such-and-such a light wavelength, sound with a such-and-such a wave pattern, etc. – are plausible in the first place is that the early modern thinkers who inaugurated the “mechanical” conception of nature that informs modern science introduced a crucial distinction between features of the observable world that are observer-relative and those that are observer-independent – the famous primary quality/secondary quality distinction (spelled out in different ways by Galileo, Descartes, Locke, et al.). Colors, sounds, heat, cold, and the like as common sense understands them were relegated to the “observer-relative” side of the divide, and color, sound, heat, cold, etc. as objective, physical properties were, accordingly, redefined in terms of wave activity, the motions of particles, or some other “observer-independent” phenomena.

To see how this works in the case of one of Churchland’s examples, let’s distinguish between RED (in caps) and red (in italics) as follows:

RED: the qualitative character of the color sensations had by a normal observer when he looks at fire engines, “Stop” signs, Superman’s cape, etc. (which is different from the qualitative character of the sensations had by e.g. a color blind observer)

red: whatever physical property it is in fire engines, “Stop” signs, Superman’s cape, etc. that causes normal observers to have RED sensations

Now what seems to common sense to be very different from “a matrix of molecules reflecting photons at certain critical wavelengths” is RED. And sure enough, what science has shown to be identical to “a matrix of molecules reflecting photons at certain critical wavelengths” is only red, not RED. Indeed, part of the reason for distinguishing red and RED is precisely that RED seems clearly not to be identical to something like “a matrix of molecules reflecting photons at certain critical wavelengths,” since the “matrices of molecules” etc. are what they are regardless of who is looking at them while qualitative character is observer-relative.

Part of the problem with Churchland’s response to the argument from introspection, then, is that it commits a fallacy of equivocation: The sense of “red” in which “Red seems different from any property of a matrix of molecules etc.” (i.e. RED) is different from the sense of “red” in which “Science has shown that red really is just a property of a matrix of molecules etc.” (i.e. red). A similar fallacy is committed when he appeals instead to sounds or any other sensory qualities. Thus his examples do not show that our powers of observation have misled us in other domains, and thus should not be trusted in the case of introspection.

That’s one problem with his response. Another is that when we understand what is really going on in the history-of-science examples Churchland appeals to, we can see that they actually strengthen the case for dualism rather than undermine it. For if colors, sounds, heat, cold, etc. as common sense understands them – that is, in terms of their qualitative, phenomenal character – exist only in the mind of the observer and not in the physical world (which is comprised of nothing more than colorless, odorless, soundless, tasteless particles in motion, or whatever), then it seems clear that they cannot exist in the brain, or in any other physical object or system of physical objects, either. Hence they must be immaterial. As I have noted before, that was exactly the conclusion explicitly drawn by early modern thinkers like Cudworth and Malebranche – and at least implicitly by Descartes, Locke, and the other early modern advocates of the “mechanical philosophy” who also happened to be dualists – and by several philosophers since. Their view was that dualism, far from being a pre-scientific holdover destined to be abandon once we have sufficient knowledge of the brain, in fact follows from the very mechanistic conception of matter taken for granted in modern science. The basic problem was one of the themes of Thomas Nagel’s celebrated 1974 article “What is it like to be a bat?” (though Nagel is less committal there about precisely what philosophical conclusion we ought to draw from the problem). It was explicitly appealed to in defense of dualism in Richard Swinburne’s 1986 book The Evolution of the Soul.

Now Churchland or some other materialist might think there is a way to carve up the conceptual territory that doesn’t have such an implication. Fine and dandy, let’s hear it and evaluate it. But he oughtn’t to pretend that the “reductions” in question clearly favor materialism when in fact, historically, they were taken to favor the opposite view! And, especially, he oughtn’t to convey this false impression when purporting to offer an evenhanded presentation of the case for dualism.

Churchland’s treatment of the argument from irreducibility is equally bad. As evidence that our powers of reasoning can in fact be accounted for in materialistic terms, he appeals to the existence of electronic calculators. As evidence that language can be similarly accounted for, he appeals to the existence of “computer languages.” He fails even to mention the most glaringly obvious reply to such “explanations” – that they involve nothing more than a couple of bad puns, since so-called calculators don’t literally “calculate” and computers don’t literally possess “language.” Rather, both electronic calculators and computers generally are inherently devoid of any intentionality or powers of reasoning whatsoever, and have simply been designed by human beings – who do have genuine powers of reasoning and language – to carry out certain operations that aid us in our exercises in calculation and the like by simulating certain mental processes. To “explain” mental phenomena in terms of what computers do is thus precisely to get things back-asswards, since what computers do cannot be accounted for apart from the human minds which assign to their states and operations whatever meanings they have.

Again, the point isn’t that Churchland might not have a way to respond to such arguments. The point is that he pretends that the claims he makes easily and uncontroversially rebut the argument from irreducibility when in fact his claims are extremely controversial even among non-dualists. (John Searle and Hubert Dreyfus are only the two most prominent non-dualist philosophers to have criticized the suggestion that mental processes can be explained in terms of “computational” ones.) The hapless beginning student coming away from Churchland’s discussion would have no idea that his “Gee whiz, look what computers can do!” shtick is, by itself anyway, philosophically about as serious as “proving” that time travel is theoretically possible based only on what one saw once in a Star Trek episode.

Churchland also suggests that whatever explanatory difficulties materialism has are at least equally matched by any dualist attempt to explain mental phenomena in terms of “nonphysical mind-stuff.” Here again Churchland proves only that he doesn’t understand what the main arguments for dualism actually say. As I noted in my first post in this series, those arguments are not quasi-scientific “explanatory hypotheses” in the first place, but rather attempts at metaphysical demonstration. They do not “postulate” “mind-stuff” (whatever that is) any more than mathematicians “postulate” the existence of the number 48 as the “best explanation” of why 47 and 49 do not fall right next to each other in the series of natural numbers. If the arguments fail, they do not fail for the sorts of reasons that explanatory hypotheses fail (considerations of parsimony, lack of fit with existing empirical theory, etc.), any more than an attempted mathematical proof, when it fails, can fail for such reasons.

But that brings us to Churchland’s positive arguments against dualism, which we’ll look at in a third post.

Schrödinger, Democritus, and the paradox of materialism

Erwin Schrödinger was yet another of those early twentieth-century thinkers cognizant of the deeply problematic character of the mechanistic conception of the material world inherited from the early modern period – and yet another to see, in particular, that this conception of matter, far from opening the way to a materialistic solution of the mind-body problem, in fact created the problem and appears to make any materialistic solution to it impossible.

The reason does not (as one might suppose) have anything essentially to do with quantum mechanics, of which Schrödinger was one of the fathers. It has rather to do with a relatively simple philosophical point which was first made by the likes of Cudworth and Malebranche and repeated in recent years by writers like Nagel and Swinburne (as noted in the second of the earlier posts linked to above). Two relevant texts are Schrödinger’s essay “On the Peculiarity of the Scientific World-View” (from What is Life? and Other Scientific Essays) and chapter 6 of his Mind and Matter, entitled “The Mystery of the Sensual Qualities” (reprinted in What is Life? with Mind and Matter and Autobiographical Sketches – a more recent volume which does not include the earlier essay).

To summarize what I’ve said at greater length in earlier posts, the philosophical point in question is that the early moderns’ move of redefining matter so that it is devoid of color, odor, taste, sound, and the like as common sense understands them necessarily made these sensory qualities inexplicable in materialistic terms. Hence, if one is going to affirm the existence both of matter (as redefined by the moderns) and of the sensory qualities (or “qualia,” as they have come to be known, relocated from the external world to the internal world of the mind), then it seems one is necessarily committed to mind-body dualism of some sort (whether substance dualism or property dualism). The only way to avoid such dualism is either to reject the existence of matter (as Berkeley did), to reject the existence of the sensory qualities (as eliminativists do explicitly and most other materialists do implicitly), or to reject the mechanistic conception of matter that led to the problem in the first place (as Aristotelians do; though Aristotelianism still leads to a non-Cartesian form of dualism – what David Oderberg calls hylemorphic dualism – for reasons that have nothing to do with sensory qualities or qualia).

To be sure, Schrödinger himself does not explicitly draw an anti-materialist conclusion. He notes merely that what he calls the “objectivation” of matter – the conceptual removal from it of anything that smacks of the personal or of mind (cf. Thomas Nagel’s “objective/subjective” distinction) – makes the mind itself deeply mysterious. This is compatible with views like Colin McGinn’s “mysterianism” or Joseph Levine’s “explanatory gap” position, which affirm materialism even as they deny that we can understand, or at least (in Levine’s case) that we do in fact understand, how materialism can be true. Not that Schrödinger himself affirms this kind of view either; he simply calls attention to the problem raised by the modern conception of matter without trying to resolve it. (For my part, I consider McGinn’s and Levine’s positions non-starters. You might as well say, in response to Gödel, “Maybe the consistency of a formal system containing computable arithmetic really is internally provable after all, and our minds are just constitutionally incapable of seeing how.”)

Schrödinger’s emphasis is also less on the mind-body problem per se than on the epistemological paradox he sees implied by the modern “objectivation” of matter. As he puts it in “On the Peculiarity of the Scientific World-View”:

We are thus facing the following strange situation. While all building stones for the [modern scientific] world-picture are furnished by the senses qua organs of the mind, while the world picture itself is and remains for everyone a construct of his mind and apart from it has no demonstrable existence, the mind itself remains a stranger in this picture, it has no place in it, it can nowhere be found in it. (p. 216)

That is to say, the picture modern science (as informed by an “objectified” mechanistic conception of matter) paints of the natural world presents it as devoid of the sensory qualities and of anything personal. And yet the picture itself exists only within the minds of persons – scientists themselves – and takes as its evidential base the senses, and thus the very sensory qualities it refuses to locate in nature.

This epistemological paradox was a major theme of E. A. Burtt’s The Metaphysical Foundations of Modern Physical Science (Burtt being, as I have noted before, one of several major early twentieth-century scholars who emphasized the problematic character of the mechanistic revolution, before this theme went down the academic memory hole sometime in the 1960s). But awareness of it goes back much farther than that – indeed (and as Schrödinger reminds us) all the way back to the 5th century B.C., and in particular to Democritus, one of the fathers of atomism. In a famous fragment, Democritus imagines a conversation between the intellect, which (as Democritus naturally assumed) must endorse the atomists’ banishment of the sensory qualities from nature, and the senses, which form the evidential basis for the atomist theory:

Intellect: “Color is by convention, sweet by convention, bitter by convention; in truth there are but atoms and the void.”

Senses: “Wretched mind, from us you are taking the evidence by which you would overthrow us? Your victory is your own fall.”

It must be emphasized that Democritus is, commendably, calling attention to a difficulty facing a theory that he himself endorses; and that we have no idea how, or even if, he tried to resolve it. It is by no means obvious that any materialist in the intervening millennia has done any better. Many of them have done worse; indeed, vulgar materialists of the New Atheist stripe typically show no awareness that there is a problem here in the first place. Unfortunately, this includes Daniel Dennett, a well-known philosopher of mind. Dennett explicitly endorses an eliminativist position vis-à-vis the sensory qualities (see e.g. his essay “Quining Qualia”) – which is to his credit insofar as (I would argue) any consistent materialist must ultimately be an eliminativist anyway. What is not to his credit is his utter blindness to the deep philosophical puzzles such a position opens up, his peddling of shameless caricatures of anti-materialist views, and in general his refusal to concede that opponents of materialism are motivated by serious philosophical concerns.

Schrödinger provides us with a plausible account of the origins of this sort of blindness (in scientists, anyway – philosophers like Dennett should know better). In “The Mystery of the Sensual Qualities” he writes:

Scientific theories serve to facilitate the survey of our observations and experimental findings. Every scientist knows how difficult it is to remember a moderately extended group of facts, before at least some primitive theoretical picture about them has been shaped. It is therefore small wonder, and by no means to be blamed on the authors of original papers or of text-books, that after a reasonably coherent theory has been formed, they do not describe the bare facts they have found or wish to convey to the reader, but clothe them in the terminology of that theory or theories. This procedure, while very useful for our remembering the facts in a well-ordered pattern, tends to obliterate the distinction between the actual observations and the theory arisen from them. And since the former always are of some sensual quality, theories are easily thought to account for sensual qualities; which, of course, they never do. (p. 164)

In the case at hand, neuroscientists who begin, as every empirical scientist must, with observations – that is to say, with conscious experiences whose character is determined by various sorts of qualia or sensory qualities – go on to construct a theoretical description of the physical and neural processes associated with perception. This theoretical description then takes on, as it were, a life of its own, coming to seem as real or even more real than the concrete experiences that led to it, and the language in which the former is couched comes to be applied to the theorist’s description of the latter. Thus an explanation of “heat” in the sense of molecular motion comes to seem, especially when coupled with neuroscientific data, an explanation of “heat” in the sense of a certain kind of tactile sensory quality; an explanation of “red” in the sense of light of a certain wavelength comes to seem an explanation of “red” in the sense of a certain kind of visual sensory quality; and so forth.

But this is a muddle, a subtle committing of the fallacy of equivocation. The key theoretical concepts – molecular motion, light wavelengths, neural firing patterns, and so forth – are always understood in light of a broadly mechanistic conception of the natural world which follows the early moderns’ project of excluding final causes, sensory qualities and the like from matter and redefining it in abstract mathematical terms. To “explain” sensory qualities or qualia in such “scientific” (i.e. mechanistic and “objectified”) terms is thus really to change the subject. Earlier generations of philosophers and scientists realized this, which is why few of them were materialists – they saw that, by definition as it were, sensory qualities could not be “material” given the new conception of matter. But later generations – especially the current generation of scientists, who tend to be far more specialized and often seem less philosophically-minded or philosophically-educated than their predecessors – have forgotten this conceptual history. And this forgetfulness and philosophical shallowness together with the practical successes of modern science have hardened many of them – or at least the more vocal of the pop science writers among them – into a crude scientism which assumes that there are no philosophical problems, or at least no serious ones, which science is not capable of answering.

Thus, when philosophers come along – whether dualists or the more sophisticated and fair-minded sort of naturalist (e.g. a Searle, a Nagel, or a Chalmers) – and point out that existing neuroscientific “explanations” of consciousness and the like do not in fact explain the relevant phenomena at all, it comes to seem like these philosophers are inventing a new problem in a desperate and obscurantist attempt to salvage a belief in human dignity and specialness. In fact they are simply calling attention to a very old problem that the mechanistic theoretical model itself has created, and of which earlier generations of philosophers and scientists were well aware. In fact it is scientism which fosters obscurantism, ignoring as it does clear conceptual distinctions and forcing all intellectual life into a methodological procrustean bed. And in fact the mechanistic “objectified” conception of matter inherited from the early moderns is not a scientific discovery at all but a philosophical posit, and one which creates philosophical problems rather than solves them.

Obviously I am not claiming to establish these large claims here. (Doing so is in large part what The Last Superstition is about.) And obviously there are different moves a materialist might try to make in order to get around the problems in question (though, equally obviously, I don’t myself think any such moves can succeed). The point is that the problems are real ones, and serious ones. Any naturalist who dismisses them as motivated by irrational religious fanaticism is either ignorant or dishonest; certainly Democritus, Schrödinger, Burtt, Searle, Nagel, Chalmers et al. have no theological ax to grind. It goes without saying that our knowledge of the human brain has come a very long way since the 5th century B.C. But philosophically speaking, the history of materialism from Democritus to Dennett marks a precipitous decline.

Addendum 9/14: It occurs to me on re-reading the post that the Chalmers reference in the first sentence of the second-to-last paragraph is, coupled with the “or,” unintentionally misleading: Chalmers is a naturalist, but he is also a dualist of sorts. My apologies. The conceptual lay of the land vis-à-vis this subject is extremely complex, the range of possible positions is very large, and it is difficult briefly to summarize the issues without oversimplification – especially when (as was the case with this post) one is writing late on a Saturday night!

The theology of Prometheus

I’m afraid I’m very much a latecomer to the pretentious commentary party vis-à-vis Ridley Scott’s Prometheus, since I only saw the flick after it came out on Blu-ray and even then have been too preoccupied with other things of late to comment.  But it’s better than the reviews led me to believe, and worth a philosophical blog post.  Plus, I need to do something to keep this site from becoming The Official Thomas Nagel and David Bentley Hart Commentary Page and Message Boards.

Gelernter on computationalism

People have asked me to comment on David Gelernter’s essay on minds and computers in the January issue of Commentary.  It’s written with Gelernter’s characteristic brio and clarity, and naturally I agree with the overall thrust of it.  But it seems to me that Gelernter does not quite get to the heart of the problem with the computer model of the mind.  What he identifies, I would argue, are rather symptoms of the deeper problems.  Those deeper problems are three, and longtime readers of this blog will recognize them.  The first two have more to do with the computationalist’s notion of matter than with his conception of mind.

Reading Rosenberg, Part I

I called attention in an earlier post to my review in First Things of Alex Rosenberg’s new book The Atheist’s Guide to Reality.  Here I begin a series of posts devoted to examining Rosenberg’s book in more detail than I had space for in the review.  The book is worthy of such attention because Rosenberg sees more clearly than any other prominent atheist just how extreme are the implications of the scientism on which modern atheists tend to base their position.  Indeed, it is amazing how similar his conclusions are to those I argue follow from scientism in chapters 5 and 6 of The Last Superstition.  The difference is that whereas I claim that these consequences constitute a reductio ad absurdum of the premises that lead to them, Rosenberg regards them as “pretty obvious” and “totally unavoidable” truths about an admittedly “rough reality,” which atheists should embrace despite its roughness.  How rough is it?  Writes Rosenberg:

Science -- especially physics and biology -- reveals that reality is completely different from what most people think.  It’s not just different from what credulous religious believers think.  Science reveals that reality is stranger than even many atheists recognize. (p. ix)

and

The right answers are ones that even some scientists have not been comfortable with and have sought to avoid or water down. (p. xii)

The pointlessness of Jerry Coyne

People have asked me to comment on the recent spat between Jerry Coyne and Ross Douthat.  As longtime readers of this blog know from bitter experience, there’s little point in engaging with Coyne on matters of philosophy and theology.  He is neither remotely well-informed, nor fair-minded, nor able to make basic distinctions or otherwise to reason with precision.  Nor, when such foibles are pointed out to him, does he show much interest in improving.  (Though on at least one occasion he did promise to try actually to learn something about a subject concerning which he had been bloviating.  But we’re still waiting for that well-informed epic takedown of Aquinas we thought we were going to get from him more than two years ago.)

McGinn on mind and space

Thoughts and experiences seem to lack spatial location.  It makes sense to say of a certain cluster of neurons firing that they are located several centimeters in from your left ear.  But it seems to make no sense to say that your experience of feeling nervous, or your thought about the Pythagorean Theorem, is located several centimeters in from your left ear.  After all, no one who opened up your skull or took an X-ray of your head would see the thought or the experience, nor would either be detectible through any other perceptual means.  In his book The Mysterious Flame: Conscious Minds in a Material World, Colin McGinn defends this commonsense supposition that mental states and processes are not locatable in space.