Come on now, be honest! Which one of you wouldn't rather listen to his hairdresser than Hercules? Or Horatius, or Orpheus... people so lofty they sound as if they shit marble!Monday, September 6, 2010
Pop culture and the lure of Platonism
Come on now, be honest! Which one of you wouldn't rather listen to his hairdresser than Hercules? Or Horatius, or Orpheus... people so lofty they sound as if they shit marble!Tuesday, August 31, 2010
The Metaphysics of Monk
OK, kids, time for some more pretentious half-baked pop culture analysis. But we want to move on now from the grotesqueries of Gaga to the good stuff. So, put on that bop beret and let’s get to it.Why is the music of Thelonious Monk so beautiful? (Let’s not waste time arguing about whether it is. It is. So there.) Consider a few well-known representative samples. First, that classic piece of driving bebop, “Straight, No Chaser”:
Then, for something softer and more contemplative, “’Round Midnight”:
Finally, perhaps the mother of all Monk tunes, “Brilliant Corners,” a piece so difficult to play that twenty-five incomplete takes had to be stitched together in order to produce a version for the album of the same name. (See Robin Kelley’s account of the sessions in his recent book Thelonious Monk: The Life and Times of an American Original.) I prefer the big band version myself, but since I can’t find it online, here’s the original:
That will give you a sense, if you weren’t familiar with it already, of the famous odd angularity and discordance of Monk’s music. And yet it works. But why? And why is it beautiful in a way that the notoriously even more discordant music of (say) Ornette Coleman is not?
The answer might be found in the work of G. W. Leibniz (of all people); or, to be more precise, in a set of principles that long pre-date Leibniz but which he adapted for his own philosophical use, viz. the principle of plenitude and the principle of economy. The principle of plenitude tells us that a world with more variety in it is better than a world with less; the principle of economy tells us that a world governed by simple and elegant principles is better than a world governed by needlessly complex ones. For Leibniz, the best of all possible worlds would be one that exhibited the perfect balance between plenitude and economy. A universe comprised only of a single metallic sphere might score extremely high on the economy scale but extremely low in the plenitude scale; a world comprised of an incalculably large number of different objects so diverse that no two of them fell under the same categories or laws would score extremely high on the plenitude scale but extremely low on the economy scale. Famously, Leibniz held that the actual world must be one which strikes the right balance, since in his view God must create the best of all possible worlds. Now, I don’t endorse Leibniz’s theological application of these principles. (We Thomists reject the claim that God has to create the best of all possible worlds.) But we can agree with him that there is goodness, and thus (if we factor in the doctrine of the transcendentals) beauty, in the balancing of plenitude and economy.
Consider that among the kinds of variety in which we seem naturally to take pleasure, and thus which possess a kind of beauty, is the kind that involves some element of the unexpected. This seems to be one reason why we enjoy stories with twist endings, jokes, roller coasters, dreams, surrealist art, science fiction and fantasy, and other artworks, activities, and experiences in which routine is departed from and ordinary expectations are upended, sometimes even suddenly. Their “plenitude” makes them good and beautiful, and a lack of plenitude or variety makes watching paint dry (say) or standing in a long queue unpleasant, despite the high score such activities have on the scale of economy or order. But there are limits to how much of this sort of variety we can stand. Obviously, we do not (always) find the unexpected pleasant when it poses a danger to us. More to the present point, we also find it unpleasant when the ordinary is departed from too radically – when it is hard to detect even a minimal or abstract level of order, so that making sense of what it is we are doing or experiencing becomes not only challenging, but impossible.
It seems to me that this helps to make sense of much of our aesthetic experience. For example, it accounts for something about the history of modern art that might otherwise seem puzzling: that while at least some of the early stuff manifests an aesthetically pleasant “shock of the new” (to borrow Robert Hughes’ phrase) the work of contemporary artists who have pushed the novel themes of the modernists to their limits is uniformly hideous. It explains why Christopher Nolan movies deserve the hype they get, while David Lynch movies are tiresome crap. And it explains why Monk’s music is beautiful while the “free jazz” of Coleman is often downright ugly. (Check out this further example. Yikes.) Both take you in directions you do not expect to go, but Monk’s tangents invariably resolve themselves into an order and economy which is, however complex, still clearly perceptible.
Monday, August 30, 2010
Wednesday, August 25, 2010
“Homicide bomber”
Some of my fellow conservatives complain that use of the expression “suicide bomber” evinces a left-wing bias and that “homicide bomber” is a more appropriate expression. The idea is that since the primary intent of terrorists who strap bombs to themselves is to kill other people and not themselves, “suicide bomber” is highly misleading and serves only to whitewash the true evil of the acts in question, presumably so as not to offend Muslims.Monday, August 23, 2010
Edwards on infinite causal series
Edwards does realize that Aquinas is not arguing that the universe must have had a beginning – that the first cause he is arguing for is “first” not in a temporal sense, but in an ontological sense, a sustaining cause of the world here and now and at any moment at which the world exists at all. Still, he thinks this fails to address the heart of the atheist’s critique. For why might a series of causes existing simultaneously, all here and now, not be as infinite as a temporal regress of causes might be (by Aquinas’s own admission)? And if there must be a first uncaused cause in the order of simultaneous causes, why could it not be something other than God, such as basic material particles or gravitational forces?
The very asking of these questions shows that Edwards does not understand the distinction between causal series ordered per accidens and causal series ordered per se, on which the Thomistic arguments (like other Scholastic cosmological arguments) crucially depend. Following Joyce, Edwards refers instead to the distinction between causes in fieri and causes in esse, which might be part of the problem. Not that there is anything wrong with Joyce’s terminology, but it might suggest to someone otherwise unfamiliar with the Thomistic and Scholastic arguments – as it apparently did to Edwards – that the difference between “becoming” and “being” is what is supposed to be the key to seeing why the second sort of causal series cannot in the Thomist’s view be infinite. And that is not the case.
What is key is the distinction between instrumental and principal causality (or second and first causality), a distinction which the language of per accidens versus per se (which I use in The Last Superstition and Aquinas) better conveys. An instrumental cause is one that derives whatever causal power it has from something else. To use Aquinas’s famous example, the stick that the hand uses to push the stone has no power to push the stone on its own, but derives its stone-moving power from the hand, which uses it as an “instrument.” (Of course, the stick might have some other causal powers apart from the hand; the point is that relative to the specific series hand-stick-stone it has no independent causal power.) A principal cause is one that does have its causal power inherently. The hand in our example can be thought of for purposes of illustration as such a cause, though of course ultimately it is not, since its power to move the stick depends on other factors. Indeed, there can at the end of the day be only one cause which is principal or non-instrumental in an unqualified sense, namely a cause which is purely actual and thus need not be actualized in any way whatsoever by anything else. In any event, it is because all the causes in such a series other than the first are instrumental in this way that they are said to be ordered per se or “essentially,” for their being causes at all depends essentially on the activity of that which uses them as instruments. By contrast, causes ordered per accidens or “accidentally” do not essentially depend for their efficacy on the activity of earlier causes in the series. To use Aquinas’s example, a father possesses the power to generate sons independently of the activity of his own father, so that a series of fathers and sons is in that sense ordered per accidens rather than per se (though each member of such a series is also dependent in various other respects on causal series ordered per se).
So, it is ultimately their instrumental character, and not their simultaneity, which makes every member of a per se ordered causal series other than the first depend necessarily on the first. To be sure, the paradigm cases of causal series ordered per se involve simultaneity, because the simultaneity of the causes in these examples helps us to see their instrumental character. And the Thomist does hold that the world must ultimately be sustained at every instant by a purely actual uncaused cause, not merely generated at some point in the past. For these reasons, Thomists tend to emphasize simultaneity in their explanations of causal series ordered per se, as I did in The Last Superstition.
But it is arguably possible at least in theory for there to be a per se causal series in which some of the members were not simultaneous. Suppose a “time gate” of the sort described in Robert Heinlein’s story “By His Bootstraps” were possible. Suppose further that here in 2010 you take a stick and put it halfway through the time gate, while the other half comes out in 3010 and pushes a stone. The motion of the stone and the motion of the hand are not simultaneous – they are separated by 1000 years – but we still have a causal series ordered per se insofar as the former motion depends essentially on the latter motion. I am not saying that this really is possible, mind you; it presupposes that time travel itself is at least possible in principle, which is controversial at best. But let’s grant it for the sake of argument. Insofar as the hand’s operation and existence will themselves presuppose various other factors, we have a continuation to the regress of causes ordered per se which cannot be ended until we reach a purely actual uncaused cause. The end result is the same, even if the statement of the argument needs to be made more complicated.
Now Hennessey, unlike Edwards, does see that it is the instrumental nature of the causes rather than their simultaneity that is doing the metaphysical work here. What Hennessey doesn’t see is that this completely undermines whatever force he thinks there is in Edwards’ critique. Edwards thinks that a series of causes in esse no more needs to have a first member than a series of causes in fieri does, and it is evident that he thinks this because he assumes that in the first sort of series no less than in the second, “every member is genuinely the cause of the one that follows it” (as Edwards puts it at the end of part III). Now if this assumption were correct, then it would indeed be odd for Aquinas to hold that a series of causes in fieri might be infinite while a series of causes in esse (or, better, a series of causes ordered per se) could not be. For it is precisely because they have their causal power independently of any earlier members of the series that Aquinas argues that the activity of the members of a per accidens series need not be traced to a first cause. So, if he thought that the members of a series of per se causes also had independent causal power, then his reason for tracing that sort of series to a first member would be undermined. But of course, that is not what Aquinas thinks. He thinks that they do not have such independent causal power, and so (contrary to what Edwards suggests) it is not at all odd, arbitrary, or unjustified for him to say that a series ordered per se needs to trace its activity to a first uncaused cause. Edwards misses this because he thinks that the Thomistic argument rests on an appeal to simultaneity, and Edwards doesn’t see how simultaneity requires an uncaused cause. But as I have said, the argument doesn’t rest on simultaneity as such. It rests on the instrumentality of the members of a causal series ordered per se, and instrumentality does require an uncaused cause.
[As a side note, this does not mean that there is no sense in which the members of a causal series ordered per se are genuine causes; Aquinas is not an occasionalist. But how his account avoids occasionalism is a separate issue, and does not affect the soundness of Thomistic cosmological arguments as such.]
It seems to me that the reason Hennessey misses this no less than Edwards is that he puts too narrow an interpretation on the word “first” in the expression “first cause.” He seems to think that what Aquinas was concerned to show is that if you lay out a series of causes ordered per se in a straight line, the line will necessarily have a beginning. But that is not what he was concerned to show. As Thomists sometimes point out, it wouldn’t change things in the least if we granted for the sake of argument that a series of causes ordered per se might loop around back on itself in a circle, or even that it might extend forward and backward infinitely. For the point is that as long as the members of such a circular or infinite chain of causes have no independent causal power of their own, there will have to be something outside the series which imparts to them their causal efficacy. (As the Thomist A. D. Sertillanges once put it, a paint brush can’t move itself even if it has a very long handle. And it still couldn’t move itself even if it had an infinitely long handle.) Moreover, if that which imparts causal power to the members of the circular or infinitely long series itself had no independent causal power, then it too would of necessity also require a principal cause of its own, relative to which it is an instrument. This explanatory regress cannot possibly terminate in anything other than something which has absolutely independent causal power, which can cause or “actualize” without itself having to be actualized in any way, and only what is purely actual can fit the bill.
That is the way in which it is “first” – first in the sense of being metaphysically ultimate or fundamental, and not (necessarily) in the sense of standing at the head of some (temporal or even non-temporal) queue. That is also why, contrary to what Edwards and so many other atheists suppose, it makes no sense to ask why fundamental physical particles or the like might not be the first cause. Particles and other “naturalistic” candidates for the ground floor level of reality are all compounds of act and potency, form and matter, essence and existence; accordingly, they are in need of actualization and are therefore necessarily less than the “pure act” or Subsistent Being Itself which alone could, even in principle, be that which causes without in any way being caused (or, as I would prefer to say, which actualizes potency without itself being actualized).
For those who are interested, I discuss these issues at greater length in Aquinas, which provides a more thorough, in-depth, and “academic” treatment of the Thomistic arguments for God’s existence than The Last Superstition does. (And without the jokes, polemics, or conservative political asides that some readers – including Hennessey – feel they could live without. But Hennessey does say some kind things about The Last Superstition and about this blog, for which I thank him.)
Friday, August 20, 2010
Goo goo ga ga
Thus spake Lady Gaga, in the profile on her in this month’s Vanity Fair, a rag I admit to reading religiously. (Hey, it’s perfumed-up real pretty, which makes it perfect to wrap fish in.) You thought public morals and good taste were all she’d taken a chainsaw to – as you can see, she’s done a real number on the English language as well.
Thursday, August 19, 2010
Welcome LifeSiteNews readers
For those in whom the interview may have piqued an interest in natural law theory, I might note (if you'll forgive the shameless plug) that I provide an exposition of it in chapter 5 of my recent book Aquinas. An exposition of the natural law approach to traditional sexual morality in particular can be found in chapter 4 of my book The Last Superstition: A Refutation of the New Atheism. Both books also contain detailed exposition and defense of the traditional arguments for God’s existence associated with Thomas Aquinas, and of Scholastic philosophy more generally.
Tuesday, August 17, 2010
Sold out!
It seems that some people have had difficulty recently in getting a hold of a copy of Aquinas. Amazon.com appears to have been out of stock for several weeks now, and it looks like Philosophy of Mind (which has the same publisher) is sold out there as well (though you can still get a new copy of either book from one of the second hand dealers who sell through Amazon, or from your better Borders and Barnes and Noble outlets). While I am, needless to say, gratified to see that they are popular, I regret the inconvenience this situation has caused anyone. My publisher tells me that their U.S. distributor will be re-stocked with Aquinas by August 31st, and that they hope to have Philosophy of Mind readily available again within a month. In the meantime, you can read Ryan Anderson’s kind review of Aquinas in First Things to see what you’re missing.
Monday, August 16, 2010
Dretske on meaning
We have had occasion to address the problem of intentionality in recent posts on Daniel Stoljar and Jerry Fodor. You will recall that the intentionality of a mental state is (as contemporary philosophers tend to understand it, anyway) its meaning or “aboutness,” its “pointing” beyond itself in the way that a word or symbol points beyond itself. For example, when I think that the cat is on the mat, my thought is about or “points to” the cat’s being on the mat in a way that is analogous to the way the sentence “The cat is on the mat” points to or is about the same state of affairs, or the way a drawing of a cat on a mat is about or points to it. The difference is that while words, pictures, and material representations in general lack any inherent intentionality or meaning of their own – they have intentionality only insofar as we impart it to them – thoughts have it intrinsically. So, if a thought is as material as a word token or a picture is (for example, if it is identical to a brain process), what explains the fact that it has intrinsic intentionality while they lack it? That, in a nutshell, is the problem intentionality poses for the materialist.You will also recall that I have suggested that what makes this problem so difficult for the materialist is the very conception of matter that he has inherited from early modern thinkers like Galileo, Descartes, Hobbes, and Boyle, who abolished final causality or immanent teleology from their conception of the natural world. For the Aristotelian-Scholastic tradition that the early moderns overthrew, a kind of “meaning” pervades the natural order from top to bottom. This is taken to be manifest not only in the usual examples – the functions of biological organs – but even in basic causal regularities. If some cause A reliably generates a certain specific effect or range of effects B – rather than C, D, or no effect at all – then in the view of the Scholastics, this can only be because A inherently “points to” or “aims at” the generation of that effect, as to a final cause. But it is not only that causes “point forward” to their effects; effects also “point backward” to their causes given the Scholastic principle that whatever is in an effect must in some way be in its cause. (I discuss and defend this principle of proportionate causality in Aquinas.)
When immanent final causality was abandoned and the rest of the Scholastic analysis of causation fell away with it, causes and effects came to seem essentially “loose and separate.” This not only opened the way to the famous Humean puzzles about causation and induction, but also made the intentionality of the mental especially difficult to assimilate to a materialist metaphysics. For if the material world, being (so it was held) devoid of any immanent final causes or teleology, is thereby devoid of any inherent “pointing to” or “aiming at,” then it is hard to see how a mental state’s “pointing to” or “aiming at” something beyond itself can be accounted for in material terms.
With this background in place, let us take a look at some of the ideas of Fred Dretske, whose work on intentionality has been particularly influential within contemporary philosophy. What is sometimes called the “crude causal theory” of meaning or intentionality holds that a material symbol will represent whatever causes “tokenings” or instances of it in a law-like way. For example, instances of the word “cat” will represent cats if they are regularly caused by the presence of cats. Like other contemporary proponents of naturalistic theories of intentionality, Dretske emphasizes that a crude causal theory is inadequate, because it cannot account for cases of misrepresentation. For instance, “cat” can represent cats even when cats do not cause tokenings of it – such as when grandma, due to poor eyesight, tells us that the cat is on the mat even though it is really the dog that is on the mat.
In order to deal with this problem, Dretske, again like other contemporary naturalists, appeals to the notion of function. Let’s consider how this goes in his article “Misrepresentation,” which originally appeared in Radu Bogdan, ed., Belief: Form, Content, and Function (and was more or less incorporated later into Dretske’s book Explaining Behavior: Reasons in a World of Causes).
Dretske begins by introducing the notion of a “natural sign,” which is a more or less reliable indicator of the presence of something insofar as it is typically caused by that something in a law-like way. Hence, expanding metal is a natural sign of a rise in temperature; a northerly-flowing river is a natural sign of a downward gradient in that direction; spots on the face are a natural sign of measles; and so forth. Natural signs can be said to have a kind of “natural meaning,” which Dretske abbreviates as meaningn: spots on the face meann that measles are present, expanding metal meansn that the temperature is rising, etc. Dretske takes the notion of meaningn to be a plausible starting point for a naturalistic account of meaning, but it can, in his view, hardly be the whole story insofar as it does not give us what we need in order to account for misrepresentation. For a natural sign cannot misrepresent anything, precisely because it represents whatever causes it. To use Dretske’s example, when the doorbell malfunctions, what its ringing meansn is not that the doorbell button has been pushed (since it hasn’t been), but rather that there is electrical current flowing in the doorbell circuit. Of course, we might interpret the ringing as meaning that the button has been pushed and thus (under the circumstances) take it to count as a misrepresentation, but in that case the “meaning” in question derives from us, and in particular from the purposes to which we put doorbells, and is not there naturally in the material processes themselves.
A theory that appealed only to meaningn would therefore be no advance on a crude causal theory. What we need to add, Dretske says, is the notion of “functional meaning” or meaningf. As indicated, we ordinarily count even the malfunctioning doorbell’s ringing as meaning that the button has been pushed because it is the function of the doorbell to tell us when someone is pushing it. In this case the function derives, again, from us, but Dretske suggests that there are also natural functions that might provide a naturalistic ground for meaningf and, in turn, for the possibility of misrepresentation. Such functions most plausibly derive from biological need. Dretske gives the example of marine bacteria possessing a sensory mechanism called magnetotaxis, by which they are able to propel themselves along the earth’s magnetic field. For example, such bacteria living in the northern hemisphere are able to propel themselves toward magnetic north. Now the function of this mechanism may be to allow the bacteria, who thrive only in oxygen-free environments, to avoid oxygen-rich surface water. We might say, then, that the meaningf of such a sensory state in one of these bacteria is that oxygen-free water is present in this direction. And this is what the state will meanf even in the case where no such water is present, because (say) we have placed a bar magnet near the bacterium and thereby disoriented it. Hence we seem to have a naturalistic conception of meaning which can account for misrepresentation.
But as Dretske himself acknowledges, even this will not quite do. One problem is that it is not obvious how it accounts for meaning where biological need is not in question, though Dretske thinks the account might be extendable in a way that does account for such cases. What he thinks is a more serious problem is what he describes as the indeterminacy of biological function. If we say that the function of the bacterium’s sensory states is to indicate where oxygen-free environments are, then it seems we have an account of misrepresentation of the sort the naturalist is seeking. But why describe the function of the sensory states this way? Why not say instead that their function is to indicate the direction of geomagnetic north, or even just to indicate the direction of magnetic north? Any of these would be a plausible candidate for the function of the sensory states in question. But if we take the last of these options, then the bacterium’s sensory state does not misrepresent the environment when we place the bar magnet near it. For it really does detect (the bar’s) magnetic north in that case.
That what the bacterium ultimately needs is oxygen-free water rather than to propel itself to magnetic north per se does not help to eliminate the indeterminacy. To borrow another example of Dretske’s, if what I need is vitamin C, it doesn’t follow that any state of my perceptual-cognitive apparatus has to meanf or represent something as containing vitamin C; representing it as a lemon or orange will suffice, since being a lemon or orange is correlated with having vitamin C.
To find a naturalistic ground for the possibility of misrepresentation, then, we need in Dretske’s view to add some further element to the story; and he proposes that this further element has to do with an organism’s having (unlike the bacterium, which is sensitive only to magnetic north as an indicator of oxygen-free environments) more than one way to detect the presence of something that it needs either to seek or to avoid. So, suppose a creature needs to avoid a certain kind of tree that is poisonous to it, and that it can identify the tree either by its leaf pattern or by the texture of its bark. When it has either an internal sensory state I1 which meansn that the leaf pattern is present, or an internal state I2 which meansn that the bark is present, the creature will go into a further state R that leads it to run away. Now R itself in this case does not meann either that the leaf pattern is present or that the bark is present, because there is no regular correlation between either one of those, specifically, and R; either one could cause R. But R does meann that the tree is present, because whether it is via the leaf pattern or via the bark that the tree causes R, it will reliably cause R. And since it is its need to avoid the tree that causes the creature to go into state R, what R functionally means, meansf, is specifically that a tree of the sort in question is present, rather than that the leaf pattern is present or that the bark is present; the indeterminacy that characterized the bacteria example has been eliminated. Moroever, R will have this meaningf even if we present the creature with a fake tree with the same leaf pattern or the same bark texture. Hence we will have, in that circumstance, a case of misrepresentation, and one that can be accounted for in naturalistic terms.
To Dretske’s credit, he acknowledges that even this supplemented account is not free of difficulty. For even if R does not meann that the leaf pattern is present, specifically, or meann that the bark is present, specifically, why could we not say that R has a disjunctive meaningn, namely that R meansn that either the leaf pattern is present or the bark is present? But if we say that, then indeterminacy enters the picture yet again: R could meanf, that is to say, functionally mean, either that a tree of such-and-such a kind is present or it could meanf that either the leaf pattern or the bark is present, and there will be, in this case as in the bacteria case, no non-arbitrary way to favor one over the other as the “true” function or meaningf of R. And if we say that the latter, disjunctive meaningf is the true one, then once again we do not really have a case of misrepresentation at all: When we present the creature with a fake tree, since at least the leaf pattern or bark texture will in that case be present, the creature’s sensory state represents things accurately. Misrepresentation has, therefore, still not been explained naturalistically.
Dretske further acknowledges that this indeterminacy problem will reappear for any even more complex system as long as we can identify for it some corresponding more complex disjunctive property the detection of which might be characterized as its function. His response to the problem is to propose one final wrinkle to the theory. Suppose now that we have a creature capable, through conditioning, of continually adding to the number of properties of the tree to which it is sensitive. Hence while at one point it is sensitive only to the leaf pattern and to the texture of the bark, it might come later to be able to detect also the tree’s visible root structure, still later its average size, and so forth. If, as in our previous example, we think of the meaningn of R in this case as some disjunctive property, then since the disjunctive property in question will change as the creature adds to the properties to which it is sensitive, the meaningn of R will also change over time. And that would entail that, if we thought of the function of R as the detection of this disjunctive property, then that function, and thus the meaningf of R, would also change over time.
Nonetheless, R will still be a reliable indicator of the tree over time, and thus meann that a tree of such-and-such a sort is present over time. Hence, if we are to regard R as having some stable meaningf or functional meaning over time, Dretske says, the only such meaning available for it to have – since the disjunctive property is not stable over time – is that a tree of such-and-such a sort is present. And since it will have that meaningf even when triggered by something other than the tree (e.g. a fake tree having the same leaf pattern, or whatever), we have a naturalistic basis for explaining misrepresentation.
What should we think of Dretske’s account? There are, I believe, several problems with it. To begin at the end, if Dretske’s final revision really shows anything at all, the most it shows is that if R has some meaningf that is stable over time, then that meaningf must have to do with the detection of the tree. But that’s a big “if.” For why not say instead that R has no stable meaningf over time? What is there in the physical facts that determines that R meansf, stably, that a tree of such-and-such a sort is present, as opposed to having an ever-changing series of disjunctive meaningsf? Dretske offers us no answer. But if what R really has is nothing more than an ever-changing series of disjunctive meaningsf, then at any particular time t R will not be misrepresenting that which triggers it. Dretske’s final account is really no less subject to indeterminacy problems than are the accounts he acknowledges to be inadequate.
Of course, that might seem counterintuitive. Surely it is at least extremely plausible to say that R has the function of getting the creature to avoid trees, and does not plausibly have the ever-shifting alternative functions in question? I agree, but the problem is that we need to know how a materialist (like Dretske) can account for this, consistent with the conception of matter we have seen he is committed to, on which there are no inherent ends or purposes in nature. For if a materialist tries to solve the problem in question by postulating such ends or purposes as a way of explaining how R can have a determinate function, then he has thereby ceased to be a materialist and returned to a more or less Aristotelian or Scholastic conception of nature.
Some of the other things Dretske says point in the same direction. Recall that he claims that what he calls “natural signs” have at least a kind of “natural meaning,” even if not the kind of meaning that might explain misrepresentation. But how can a materialist justify even that modest claim? What licenses a description of expanding metal (say) as a “sign” of a rise in temperature, or as “meaning” that the temperature is rising? True, when we observe the expansion, we can (given our background knowledge) infer that the temperature is rising. But how does that show that the expanding metal has, all by itself and apart from our knowledge of it and its properties, a semantic property like “meaning”? Did it have “meaning,” or count as a “sign,” before any human beings were around? “Meaning” to whom, in that case? A “sign” to whom? In fact there would seem to be no “meaning” or “sign” literally present at all until intelligent creatures like us come along and, discovering that a rise in temperature causes metal to expand, come to take expanded metal to “mean” or be a “sign” of a rise in temperature.
Now something like built-in meaning might plausibly be attributed to expanding metal, spots on the face, and other examples of the sort Dretske gives if we were to adopt an Aristotelian-Scholastic conception of nature, on which final causality or directedness-to-an-end is inherent to patterns of what Aristotelians call efficient causality (that is, to what moderns mean when they speak of causality). If, as I put it earlier, causes inherently “point forward” to their typical effects and effects inherently “point backward” to their causes, then Dretske’s examples might do the sort of work he needs them to do. But the whole point of the early moderns’ chucking out of Scholasticism was to get rid of this sort of immanent teleology.
Yet as I have noted many times before (e.g. in this post, and in The Last Superstition and Aquinas) this sort of move is extremely common in contemporary materialism. When proponents of “naturalistic” theories of mind help themselves to notions like “natural meaning,” “biological function,” “algorithms,” “programs,” “information,” and the like, they are either using these terms in a figurative way – in which case they cannot do the work they are intended to do – or they mean them seriously, in which case those who use them are tacitly acknowledging that the Aristotelians were right after all and that modern materialism rests on a mistake. What I like to say of the moderns in general can be said of the work of contemporary naturalists in particular: What’s new in it isn’t true, and what’s true isn’t new.
Saturday, August 14, 2010
Eulogy for James F. Ross
Seamus Ross kindly posted the following below my recent post on the death of his father James F. Ross. I re-post it here so that it gets the attention it deserves:Thursday, August 12, 2010
Twist ending
In my recent Twilight Zone post, I mentioned that I intended to read Noël Carroll and Lester Hunt’s Philosophy in the Twilight Zone. I’ve since read some of it and there is indeed some interesting stuff there. Hunt himself provides a fine essay on Rod Serling’s career as a writer, and the story of that career teaches an important philosophical lesson.Monday, August 9, 2010
Happy Consequentialism Day!
Perhaps you already observed it on Friday, since that was the anniversary of the bombing of Hiroshima. But today, the anniversary of the Nagasaki bombing, is an equally fitting date. Certainly the image at left – the aftermath of Fat Man’s explosion over Nagasaki – is a fitting symbol for consequentialism. Perhaps consequentialist ethicists should consider putting it on the covers of their books, or wear little mushroom cloud pins when they meet up at philosophical conferences. For one thing, since the consequentialist case for the bombings – that they would save more lives than an invasion of Japan would – carried the day with the Truman administration (and with defenders of the bombings ever since), it may be the most consequential piece of consequentialist reasoning ever formulated. For another, the bombings give a pretty good idea of what a world consistently run on consequentialist principles might look like.(See the Oderberg article linked to above for a brief popular overview of what is wrong with consequentialism. See Oderberg’s Moral Theory: A Non-Consequentialist Approach for a more thorough and academic treatment. And see Oderberg’s Applied Ethics: A Non-Consequentialist Approach for a serious, natural law theory treatment of just war theory and other life and death moral issues.)
Saturday, August 7, 2010
Conceiving and hallucinating
The “conceivability argument” for dualism holds that (1) it is conceivable that I might exist apart from by body, and therefore that (2) it is metaphysically possible for me to exist apart from my body, so that (3) I am not identical to my body. I put forward a detailed and sympathetic exposition of this argument in chapter 2 of Philosophy of Mind – for it is more interesting and defensible than some philosophers give it credit for – but I do not in fact endorse it. It is essentially a variation on Descartes’ “clear and distinct perception” argument for dualism, and as I’ve argued elsewhere, what’s true in that argument isn’t new and what’s new isn’t true. (As an Aristotelico-Thomist I reject the rationalist assumptions inherent in Descartes’ version, and the Kripke-style modal assumptions inherent in modern versions. But demonstrating the mind’s immateriality does not require committing oneself to these assumptions.)Thursday, August 5, 2010
Some thoughts on the Prop 8 decision
1. Judge Walker’s decision, he tells us, is based on the principle that the state ought not to “enforce ‘profound and deep convictions accepted as ethical and moral principles’” or to “mandate [its] own moral code.” But that is, of course, precisely what Walker himself has done. His position rests on the question-begging assumption that “same-sex marriages” are no less true marriages than heterosexual ones are, and that the only remaining question is whether to allow them legally. But of course, whether “same-sex marriages” really can even in principle be “marriages” in the first place is part of what is at issue in the dispute. The traditional, natural law view is that marriage is heterosexual of metaphysical necessity. Rather than staying neutral between competing moral views, then, Walker has simply declared that the state should stop imposing one moral view – the one he doesn’t like – and should instead impose another, rival moral view – the one he does like.