Henry E. Dudeney (1857-1930) was, according to pure mathematician G. H. Hardy (1877-1947), one of England’s “better makers of puzzles”. His “Perplexities” column, a regular feature in The Strand Magazine between 1910 and 1930, not only gave recreational mathematicians what they wanted – an “intellectual ‘kick’” – but also occasioned the odd sparkling display of intellect from professionals. Dudeney’s geometrical dissection puzzles are a case in point, though his ingenious solutions sometimes betray a lack of clarity about the difference (...) between a mathematical proof and an empirical procedure. His equilateral triangle to square dissection and the equally stunning regular octagon to square dissection sent to him by Hardy’s colleague G. T. Bennett (1868-1943) are both here demonstrated visually – process and result an evident unity. (shrink)

Long tradition in philosophy and in empirical psychology has it that the perceptual recovery of enduring objective size and shape proceeds through initial spatial appearance experiences—like the sensed changing visual field size of a receding car, or the shifting shape appearance of a coin as it rotates in depth. The present paper carefully frames and then critically examines such proposals. It turns out that these are contingent, empirical matters, requiring close examination of relevant research in perception science in order to (...) decide. The paper concludes with extended discussions of the empirical study of the perception of slant, size, and shape. (shrink)

In the late sixteenth century a number of mathematicians tried to introduce geometrical methods into surveying practice, to be based on simplified astronomical instruments, angle measurement, and triangulation. A measure of success is indicated by the acceptance of the simple theodolite, but the surveyors resisted such complex instruments as the altazimuth theodolite, recipiangle, and trigonometer. Counter-proposals, in particular the plane table, threatened to undermine the geometrical programme, but by the mid-seventeenth century a stable compromise had evolved. Among other (...) things, the demise of the shadow square indicates that angle measurement was then part of surveying practice. (shrink)

This paper examines the discrepancy between the attitudes of many historians of mathematics to sixteenth-century geometry and those of museum curators and others interested in practical mathematics and in instruments. It argues for the need to treat past mathematical practice, not in relation to timeless criteria of mathematical worth, but according to the agenda of the period. Three examples of geometrical activity are used to illustrate this, and two particular contexts are presented in which mathematical practice localised in the (...) sixteenth century takes on a special historical significance. (shrink)

An empirically based view of size and distance perceptual content and phenomenology is introduced, in which perceivers measure worldly size and distance against their bodies. Central principles of the formal, representational theory of the measurement of extensive magnitudes are then applied in framing the account in a precise way. The question of whether spatial-perceptual experience is “unit-free” is clarified. The framework is used to assess Dennis Proffitt's proposal that spatial setting is perceived in various “units,” “scales,” or “rulers”, some of (...) them non-spatial—distance in terms of calories burned to traverse and the like. The debate between Proffitt and Firestone about the commensurability of differing measurement scales held by Proffitt to be relied on by perceivers is then clarified and resolved. Finally, the measurement theory framed account of size and distance perception is used to illuminate Gibson’s famous but elusive contrasts between “geometrical optics” and “ecological optics” and between the “physical world” and the “animal environment”. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Rhetoric 34.4 (2001) 292-307 [Access article in PDF] The Rhetoric of the Geometrical Method Spinoza's Double Strategy Christopher P. Long A double strategy may be apprehended in the first definitions, axioms and propositions of Spinoza's Ethics: the one is rhetorical, the other, systematic. Insofar as these opening passages constitute a geometrical argument that leads ultimately to the strict monism that lies at the heart of (...) Spinoza's philosophy, they function systematically as grounding principles. However, insofar as they are designed to uncover errors at the heart of the Cartesian system, they function rhetorically as a critique of Descartes's equivocal theory of substance. The geometrical mode of presentation lends an aura of necessity to the systematic strategy and tends to eclipse the rhetorical strategy that functions as a critique of Cartesian dualism. 1 To this extent, the systematic strategy itself functions rhetorically. On the other hand, to the extent that any seventeenth-century attempt to establish a monistic system would inevitably have had to involve a critique of Cartesian dualism, the rhetorical strategy itself functions systematically. Thus, although two distinct strategies are simultaneously discernible in the opening passages of the Ethics, the two work together, each arguing on a different front, to establish Spinoza's monism. By focusing on the rhetorical side of this double strategy, the underlying nature of Spinoza's critique of Descartes can be clarified and certain gaps in the systematic, geometrical argument for monism can be explained. Descartes's theory of substance The rhetorical strategy Spinoza employs at the outset of the Ethics involves a brilliant use of equivocation and ambiguity designed to draw a reader dedicated to Cartesian dualism into the heart of an argument designed to [End Page 292] undermine this dualism itself. The impetus behind this rhetorical critique is surely Spinoza's dissatisfaction with Descartes's theory of substance. 1. Descartes's equivocation Descartes's theory rests upon a fundamental equivocation: on the one hand, the term "substance" is meant strictly to designate that which is absolutely self-sufficient, namely, God; on the other hand, Descartes allows for a weaker understanding of substance, which pertains to those things (specifically res cogitans and res extensa) that require only the concurrence of God in order to exist (Principles I, 51-52; AT VIIIA24-25). 2 Thus, for Descartes, although God is, strictly speaking, the only substance, there remains a sense in which both res cogitans and res extensa may be understood as substances as well.Ultimately, this equivocal understanding of substance may be traced to a tension internal to Descartes between the Aristotelian notion of substance as underlying subject and the seventeenth-century mutation of that notion, which came to be defined in terms of causal self-sufficiency. 3 Jonathan Bennett traces the source of this mutation back to the view held by Aristotle that the existence of some property depends upon its being instantiated--that is, there can be no courage unless there exists someone courageous. He continues his interesting argument thus: This suggests that there is a relation of dependence running from properties to the things that have them and not conversely. The dependence would be logical: the thesis must be that "existent but uninstantiated property" is conceptually defective, not merely contrary to physics. Thus, one mark of a genuine thing, or substance, is its not being logically dependent for its existence on anything else. (Bennett 1984, 56) The development of this line of thinking leads to the conception of substance we find both in Descartes's Principles and in Spinoza's Ethics, namely, that a substance must not causally depend on anything outside of itself for its existence. 4 However, with Descartes, what emerges out of this tradition is a hybrid understanding of substance in which the term "substance" is not reserved simply for that which is utterly self-sufficient (God), but extends to those things that depend only upon the concurrence of God for their existence (rescogitans and resextensa). This bifurcated understanding of substance seems to stem from the distinction at work in [End Page 293] Aristotle... (shrink)

Objective: Based upon notions to a mental vision of the Vitruvian Man, to determine if any obvious asymmetries exist within Leonardo da Vinci’s timeless schematic—which is famous for its highly symmetrical presentation. Methods: A qualitative analysis performed upon a Vitruvian Man print (taken from the namesake Wikipedia article) to: closely examine if the man’s head is positioned to noticeably tilt toward either direction—left or right—of a dissecting line superimposed for equally splitting (vertically) the circle in the schematic; and, to closely (...) examine the man’s eyes for any artistic asymmetry therein drawn. Results: The man’s head is determined tilting toward his right half/hemisphere of the circle. Also noticeable: the man’s right eye appears being of a much brighter look relative to a darkness observable about his left eye; and, an outline to an inverted equilateral triangle is identifiably shaded surrounding his left eye, whereas a more contrastingly circular shape appears as so shaded around his right eye. Discussion: Once a certain awareness is drawn to such artistic anomalies, they can become so clearly observable that one may wonder if Leonardo da Vinci did as much intentionally. And if so, then why? This paper details a hypothesis necessarily built upon the assumption that Leonardo intentionally embedded such cues within his Vitruvian Man whereby speculations toward a hemispheric brain theory can be established of such cryptic nature, given a then-pronouncedly authoritarian Catholic Church, whereupon he may have figured it possible to receive credit posthumously if ever such notions were proven valid. Incidentally, the concerning analysis as to why the Vitruvian Man’s head tilts in such a fashion aligns with Dr. Iain McGilchrist’s peer-reviewed findings to a hemispheric hypothesis. (shrink)

A famous result of Hausdorff states that a sphere with countably many points removed can be partitioned into three pieces A, B, C such that A is congruent to B, B is congruent to C, and A is congruent to B ∪ C; this result was the precursor of the Banach–Tarski paradox. Later, R. Robinson characterized the systems of congruences like this which could be realized by partitions of the sphere with rotations witnessing the congruences. The pieces involved were nonmeasurable. (...) In the present paper, we consider the problem of which systems of congruences can be satisfied using open subsets of the sphere ; of course, these open sets cannot form a partition of the sphere, but they can be required to cover "most of" the sphere in the sense that their union is dense. Various versions of the problem arise, depending on whether one uses all isometries of the sphere or restricts oneself to a free group of rotations, or whether one omits the requirement that the open sets have dense union, and so on. While some cases of these problems are solved by simple geometrical dissections, others involve complicated iterative constructions and/or results from the theory of free groups. Many interesting questions remain open. (shrink)

In 1986, philosopher-bioethicist Samuel Gorovitz published an essay entitled “Baiting Bioethics,” in which he reported on various criticisms of bioethics that were “in print, or voiced in and around … the field” at that time, and set forth his assessment of their legitimacy. He gave detailed attention to what he judged to be the particularly fierce and “irresponsible attacks” on “the moral integrity” and soundness of bioethics contained in two papers: “Getting Ethics” by philosopher William Bennett and “Medical Morality Is (...) Not Bioethics,” coauthored by us. Gorovitz attributed some of the criticisms that bioethics was eliciting to the fact that this new, rapidly rising, and increasingly visible field had brought “scholars and practitioners together who otherwise would have little exposure to one another's disciplines. Their interactions are mutually enriching at times,” he declared, “but mutually baffling and even infuriating at other times.” In this latter regard, he suggested that “perhaps” Fox and Swazey's characterization of bioethics in the article he dissected “reflects a general revulsion at endeavors they see as inadequately like the social sciences or insufficiently respectful of them.” He went on to say that despite his objections to our “complaints” about bioethics—especially to our claim that “autonomy [had] been an unduly emphasized value” in the field—he had “a lingering sense” that there might be “a grain of truth” in them. Gorovitz ended his essay with an affirmation about the “benefit” that bioethics can derive from “responsible” and even from “irresponsible” criticism. “The unexamined discipline invites the philosopher's critical scrutiny no less than the unexamined life,” he aphoristically concluded. a. (shrink)

Recently much has been made of the grounding relation, and of the idea that it is intimately tied to fundamentality. If A grounds B, then A is more fundamental than B (though not vice versa ), and A is ungrounded if and only if it is fundamental full stop—absolutely fundamental. But here is a puzzle: is grounding itself absolutely fundamental?

The basic form of the exclusion problem is by now very, very familiar. 2 Start with the claim that the physical realm is causally complete: every physical thing that happens has a sufficient physical cause. Add in the claim that the mental and the physical are distinct. Toss in some claims about overdetermination, give it a stir, and voilá—suddenly it looks as though the mental never causes anything, at least nothing physical. As it is often put, the physical does all (...) the work, and there is nothing left for the mental to do. (shrink)

A lot of people believe that distinct objects can occupy precisely the same place for the entire time during which they exist. Such people have to provide an answer to the 'grounding problem' – they have to explain how such things, alike in so many ways, nonetheless manage to fall under different sortals, or have different modal properties. I argue in detail that they cannot say that there is anything in virtue of which spatio-temporally coincident things have those properties. However, (...) I also argue that this may not be as bad as it looks, and that there is a way to make sense of the claim that such properties are primitive. (shrink)

I think that there is an awful lot wrong with the exclusion problem. So, it seems, does just about everybody else. But of course everyone disagrees about exactly _what_ is wrong with it, and I think there is more to be said about that. So I propose to say a few more words about why the exclusion problem is not really a problem after all—at least, not for the nonreductive physicalist. The genuine _dualist_ is still in trouble. Indeed, one of (...) my main points will be that the nonreductive physicalist is in a rather different position vis à vis the exclusion problem than the dualist is. Properly understanding nonreductive physicalism—and clearly recognizing that it is, after all, a form of _physicalism_—goes a long way toward solving the exclusion problem. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:New Essays on the RationalistsSteven NadlerRocco J. Gennaro and Charles Huenemann, editors. New Essays on the Rationalists. Oxford: Oxford University Press, 1999. Pp. xvii + 391. Cloth, $60.00.Here is yet another collection of essays on early modern philosophy. The focus this time is on the Seventeenth century, in particular "the rationalists." What this apparently involves is, as the old-fashioned classification has it, Descartes, Spinoza, and Leibniz. But there (...) is no overall theme to the essays, nothing uniting them besides the fact that almost all are devoted to those three thinkers and the fact that the volume was inspired by a summer seminar run by Jonathan Bennett.What the editors mean by "the rationalists" (besides the extensional definition) is [End Page 437] thinkers "united in the belief that the intellect and human reason are powerful tools in our ability to know about the ultimate nature of mind and matter." What is supposed to separate "the rationalists" from "the empiricists" is "a belief in the power of human reason" (xv). This is a fairly weak claim; and I, for one, am skeptical that such categories are truly useful (or even valid—one would be hard-pressed to find a single issue on which Descartes, Spinoza, and Leibniz all agree and on which those who are usually called "empiricists" unanimously dissent). In the light of so much important and creative work done over the last twenty years in seventeenth-century philosophy, it would have been nice to see a volume devoted to "the rationalists" include at least one sophisticated discussion of the legitimacy and grounds of such a label.The essays in this book are divided into three categories: Matter and Substance; Freedom and Necessity; and Mind and Consciousness. The contributors are a broad mix of scholars: some established and accomplished, others new and up-and-coming. The quality of the work is consistently high. There is a lot of detailed and careful work here, both in the attention to the historical texts and in philosophical analyses. However, not all of the essays are of great scope or interest; in fact, most are not. There is a definite tendency toward the small-scale (but not brevity): a concern with micro-problems (for example, the chapter by Clarence Bonnen and Daniel Flage, "Distinctness," is devoted to the question of what the "distinctness" of an idea is for Descartes) and an emphasis on theses and arguments (such as Geoffrey Gorham's examination of the "similarity condition" for causation in Descartes, "Causation and Similarity in Descartes,"). If there is indeed an "analytical" way of doing history of philosophy, that school is well represented here.And then there are a couple of essays that stand out by transcending this narrowness of focus. The chapters by Catherine Wilson ("The Illusory Nature of Leibniz's System") and Don Garrett ("Teleology in Spinoza and Early Modern Rationalism") are, without question, the boldest and most interesting of the collection. Wilson argues that, in the light of Leibniz's changing and inconsistent views on substance, there really is no metaphysical "system" in his philosophy. Garrett, in what is, to my mind, the best essay in the book (although I think I disagree with him), defends an account of teleology in Spinoza's metaphysics, and then compares Spinoza's views on teleology with those of Aristotle, Descartes, and Leibniz; he concludes that Spinoza not only accepted teleological explanations of particular phenomena, but did so more strongly than anyone else in the modern period. Experts will, of course, disagree with the claims made by Wilson and Garrett; that is what this game is all about. But it is truly refreshing to see scholars such as these taking on large-scale issues.It is worth noting that there is also a nice, indirect dialogue between two of the essays: Charles Huenemann's interesting account of a consistent necessitarianism in Spinoza ("The Necessity of Finite Modes and Geometrical Containment in Spinoza's Metaphysics,") and Edwin Curley and Gregory Walski's argument (in "Spinoza's Necessitarianism Reconsidered,") that, when it comes to the finite modes, Spinoza is not a strong or absolute necessitarian. What is truly unfortunate about the collection, however... (shrink)

Concerns about ‘mental causation’ are concerns about how it is possible for mental states to cause anything to happen. How does what we believe, want, see, feel, hope, or dread manage to cause us to act? Certain positions on the mind-body problem—including some forms of physicalism—make such causation look highly problematic. This entry sketches several of the main reasons to worry, and raises some questions for further investigation.

In this paper I consider whether traditional behaviors of animals, like traditions of humans, are transmitted by imitation learning. Review of the literature on problem solving by captive primates, and detailed consideration of two widely cited instances of purported learning by imitation and of culture in free-living primates (sweet-potato washing by Japanese macaques and termite fishing by chimpanzees), suggests that nonhuman primates do not learn to solve problems by imitation. It may, therefore, be misleading to treat animal traditions and human (...) culture as homologous (rather than analogous) and to refer to animal traditions as cultural. (shrink)

I argue that it is intuitive and useful to think about composition in the light of the familiar functionalist distinction between role and occupant. This involves factoring the standard notion of parthood into two related notions: being a parthood slot and occupying a parthood slot. One thing is part of another just in case it fills one of that thing's parthood slots. This move opens room to rethink mereology in various ways, and, in particular, to see the mereological structure of (...) a composite as potentially outreaching the individual entities that are its parts. I sketch one formal system that allows things to have individual entities as parts multiple times over. This is particularly useful to David Armstrong, given Lewis's charge that his structural universals must do exactly that. I close by reflecting upon the nature and point of formal mereology. (shrink)

P. T. Geach, notoriously, holds the Relative Identity Thesis, according to which a meaningful judgment of identity is always, implicitly or explicitly, relative to some general term. ‘The same’ is a fragmentary expression, and has no significance unless we say or mean ‘the same X’, where ‘X’ represents a general term (what Frege calls a Begriffswort or Begriffsausdruck). (P. T. Geach, Mental Acts (London: Routledge and Kegan Paul, 1957), p. 69. I maintain that it makes no sense to judge whether (...) things are ‘the same’, or remain ‘the same’, unless we add or understand some general term - ‘the same F’. (P. T. Geach, Reference and Generality, third Edition (Ithaca, N.Y.: Cornell University Press, 1980), pp. 63f. I am arguing for the thesis that identity is relative. When one says ‘x is identical with y’, this, I hold, is an incomplete expression; it is short for ‘x is the same A as y’, where ‘A’ represents some count noun understood from the context of utterance - or else, it is just a vague expression of a half-formed thought. (P. T. Geach, ‘Identity,’ Review of Metaphysics 21 (1967-8), p. 3.) One of the ways Geach seeks to support this is by tying it to the well nigh universally admired Fregean thesis about cardinality. (shrink)

I argue that dualism does not help assuage the perceived explanatory failure of physicalism. I begin with the claim that a minimally plausible dualism should only postulate a small stock of fundamental phenomenal properties and fundamental psychophysical laws: it should systematize the teeming mess of phenomenal properties and psychophysical correlations. I then argue that it is dialectically odd to think that empirical investigation could not possibly reveal a physicalist explanation of consciousness, and yet can reveal this small stock of fundamental (...) phenomenal properties and psychophysical laws. I go on to consider a couple of different forms the dualist's laws could take, and argue that one version makes no progress on the hard problem of consciousness, and the other replaces the hard problem with a different problem that is just as hard. (shrink)

Among medical researchers and clinicians the dominant view is that it is unethical to deceive patients by prescribing a placebo. This opinion is formalized in a recent policy issued by the American Medical Association (AMA [Chicago, IL]). Although placebos can be shown to be always safe, often effective, and sometimes necessary, doctors are now effectively prohibited from using them in clinical practice. I argue that the deceptive administration of placebos is not subject to the same moral objections that face other (...) forms of deception in clinical practice and medical research. Although deception is normally objectionable on the grounds that it limits autonomy and breaches trust, these grounds do not apply to placebos when they are prescribed within appropriate ethical limits. Patients have reason to prefer that doctors can prescribe placebos in ethically responsible ways. Hence, the AMA has an obligation to endorse and to promote the responsible use of deceptive placebos in clinical practice. (shrink)

Landauer's principle, often regarded as the basic principle of the thermodynamics of information processing, holds that any logically irreversible manipulation of information, such as the erasure of a bit or the merging of two computation paths, must be accompanied by a corresponding entropy increase in non-information-bearing degrees of freedom of the information-processing apparatus or its environment. Conversely, it is generally accepted that any logically reversible transformation of information can in principle be accomplished by an appropriate physical mechanism operating in a (...) thermodynamically reversible fashion. These notions have sometimes been criticized either as being false, or as being trivial and obvious, and therefore unhelpful for purposes such as explaining why Maxwell's Demon cannot violate the second law of thermodynamics. Here I attempt to refute some of the arguments against Landauer's principle, while arguing that although in a sense it is indeed a straightforward consequence or restatement of the Second Law, it still has considerable pedagogic and explanatory power, especially in the context of other influential ideas in nineteenth and twentieth century physics. Similar arguments have been given by Jeffrey Bub. (shrink)

It is often claimed that the autonomy of heroin addicts is compromised when they are choosing between taking their drug of addiction and abstaining. This is the basis of claims that they are incompetent to give consent to be prescribed heroin. We reject these claims on a number of empirical and theoretical grounds. First we argue that addicts are likely to be sober, and thus capable of rational thought, when approaching researchers to participate in research. We reject behavioural evidence purported (...) to establish that addicts lack autonomy. We present an argument that extrinsic forces must be irresistible in order to make a choice non-autonomous. We argue that heroin does not present such an irresistible force. We make a case that drug-oriented desires are strong regular appetitive desires, which do not compromise consent. Finally we argue that an addict’s apparent desire to engage in a harmful act cannot be construed as evidence of irrational or compulsive thought. On these arguments, a sober heroin addict must be considered competent, autonomous and capable of giving consent. More generally, any argument against legalisation of drugs or supporting infringement of the liberty of those desiring to take drugs of addiction must be based on considerations of harm and paternalism, and not on false claims that addicts lack freedom of the will. (shrink)

Bernard Linsky and Edward Zalta have recently proposed a new form of actualism. I characterize the general form of their view and the motivations behind it. I argue that it is not quite new – it bears interesting similarities to Alvin Plantinga’s view – and that it definitely isn’t actualist.

Though largely neglected by philosophers, the concept of ineffability is integral to the Christian mystical tradition, and has been part of almost every philosophical discussion of religious experience since the early twentieth century. After a brief introduction, this article surveys the most important discussions of divine ineffability, observing that the literature presents two mutually reinforcing obstacles to a coherent account of the concept, creating the impression that philosophical reflection on the subject had reached an impasse. The article goes on to (...) survey some more recent work, which draws on the conceptual resources of existential phenomenology, pragmatism, and the later Wittgenstein. It shows that this work has made possible a new philosophical account of divine ineffability that surmounts the obstacles, overcomes the impasse and makes divine ineffability, once again, a live option in philosophy of religion. The article concludes with some brief remarks on how this alternative approach reflects recent trends in the discipline as a whole and has the potential to make a valuable contribution to live research questions in epistemology of religion. (shrink)

In the first two sections of this reply article, I provide a brief introduction to the topic of ineffability and a summary of Ineffability and Religious Experience. This is followed, in section 3, by some reflections in reply to the response articles by Professors Metz and Cooper. Section 4 presents some concluding remarks on the future of philosophy of religion in the light of the most recent philosophical work on ineffability.

We must distinguish between a capacity for goal-directedness of a sort found in chess-playing computers and a capacity for robust desire, which involves finding there being something in favor of the relevant course of action in light of its significance to the subject. Existing accounts of desire, especially those given in terms of instrumental rationality, either ignore or presuppose such significance, in both cases failing to give an adequate account of robust desire. My positive thesis in this paper is that (...) we can understand what it is to be a subject of significance and so what it is to have desires only in terms of the emotions, and I offer an explicit account of emotions, desire, and significance in terms of patterns of non-instrumental rationality the subject must display in its behavior. (shrink)

Mark Pennington argues political systems should be decentralized in order to facilitate experimental learning about distributive justice. Pointing out the problems with Pennington's Hayekian formulation, I reframe his argument as an extension of the Millian idea of 'experiments in living.' However, the experimental case for decentralization is limited in several ways. Even if decentralization improves our knowledge about justice, it impedes the actual implementation of all conceptions of justice other than libertarianism. I conclude by arguing for the compatibility of egalitarian (...) redistribution with the epistemic virtues of markets pointed out by Hayek. (shrink)

A report on Cornel West's Edinburgh Gifford Lectures 2024: "A Jazz-soaked Philosophy for our Catastrophic Times: From Socrates to Coltrane".

This paper considers the ethics of routine antenatal HIV testing and the role of informed consent within such a policy in order to decide how we should proceed in this area—a decision that ultimately rests on the relative importance we give to public health goals on the one hand and respect for individual autonomy on the other.A recent illuminating qualitative study by Zulueta and Boulton1 explores the practicalities of informed consent in routine antenatal HIV testing. Its results support what I (...) have argued1 is inevitable with routine testing policies of this kind: that routine antenatal testing regimes are incompatible with requirements for informed consent. It has become clear that intervention could reduce the risk of transmitting HIV from mother to child from 15–20%2 to around 8%,3 or possibly as low as 2%.4,5 The evidence of this possibility produced a general trend towards introducing routine antenatal HIV screening in developed countries worldwide.6,7,8,9,10 The aim was to dramatically reduce the rate of HIV transmission from mother to child by encouraging universal antenatal HIV testing. The UK has been no exception, and in 1999 the government instructed health authorities to implement a policy of offering and recommending an HIV test to all pregnant women.11This UK antenatal screening policy and others like it, although well-meaning, are problematic in their formulation. In order to reflect contemporary ethical and legal practice, such policies attempt to marry the public health aims of maximising uptake of testing with a commitment to respect the choices of patients by requiring informed consent before they participate in screening. Thus, in the case of UK policy, health professionals are instructed to recommend the HIV test to all pregnant women in order to achieve the target of a 90% …. (shrink)

Surveying nearly seven decades of habitual and obsessive reading, I consider how my character and psychology used reading to shape philosophical questions that move me into forms in which I could pursue them by reading. This became both the method and the substance of my philosophical work. It preserved some core emotional issues but also gave me the way to integrate them into scholarship and into my life.

Examination of a comprehensive database of political knowledge, constructed from pooled 1988 and 1992 National Election Studies, refutes criticisms that haue sometimes been lodged against standard tests that seem to reveal profound levels of public ignorance. Although most people know something about politics, the typical citizen is poorly informed, and only a small group is very knowledgeable about politics. Differentiating people according to their perceptions of the most important national problem does not reveal pockets of well‐informed “issue publics” among the (...) electorate. The NES data also show that knowledge makes a difference in how people feel about government spending for social‐welfare programs, and in how well citizens were able to connect their partisanship and ideological proclivities to their votes in the 2000 presidential election. (shrink)

Philosophers have often sought criteria for a general distinction between appearance and reality. In chapter VII of Sense and Sensibilia, J. L. Austin claims to show that this enterprise is radically misconceived; and, characteristically, he bases his argument on the niceties of the use of ‘real’ in English. I shall try to show (1) that Austin’s account of how ‘real’ is used is muddled and inaccurate; and (2) that the uses of ‘real’ which Austin explores are irrelevant to the traditional (...) enquiry into the distinction between appearance and reality. Of these, (2) matters more, but most of my paper will treat of (1). The uses of ‘real’ which interested Austin may have some philosophical importance, so we might as well get them right. Also, although there are general grounds for denying that those uses are relevant to traditional epistemology, a tighter and more Austinian argument for the same conclusion can be based upon a correct account of the uses of ‘real’ in question. I should concede that I may have stated my thesis a little too strongly: for all I know, some philosophers may have pursued the traditional enquiry in such a miserably inadequate way that Austin’s points about the use of ‘real’ are, when suitably emended, effective against them. The fact that Austin did not publish Sense and Sensibilia suggests that he was not satisfied with its contents. Nevertheless, his views about the use of ‘real’ have been published and may be believed: personal considerations cannot be allowed to disarm criticism. I shall describe four ways of using ‘real’ in expressions of the form ‘a real F’ where ‘F’ stands for a general noun. Note the indefinite article: Austin writes as though nothing turns on the choice between ‘a real . . .’ and ‘the real . . .’, but this is not so. I shall argue that these four ways of using ‘real’ are distinct, though a single use of ‘real’ may partake of more than one of them. I believe but cannot prove that my four headings cover practically all idiomatic uses of the form ‘a real F’ other than the metaphorical, slipshod or pretentious.. (shrink)

This is an abridgement of the complete translation of the New Essays, first published in 1981, designed for use as a study text. The material extraneous to philosophy - more than a third of the original - and the glossary of notes have been cut and a philosophical introduction and bibliography of work on Leibniz have been provided by the translators. The marginal pagination has been retained for ease of cross-reference to the full edition. The work itself is an acknowledged (...) philosophical classic, in which Leibniz argues point by point with Locke's Essay Concerning Human Understanding. The result is the single most important confrontation between the philosophical traditions of rationalism and empiricism. It makes an extremely suitable focus for the study of Leibniz's thought and of those two traditions in relation to one another. (shrink)

There was a duel at dawn between A and B. A shot B, who lingered on until dusk of that day, and then died of his bulletwound. Certain background conditions are satisfied which make it right to say not just that A caused B's death but that he killed him. So, A shot B and killed him. This seems to be structurally different from "A shot B and he kicked him," but what is this structural difference? How does the shooting (...) relate to the killing? (shrink)

This paper contributes to the normative debate over capital punishment by looking at whether the role of executioner is one in which it is possible and proper to take pride. The answer to the latter question turns on the kind of justification the agent can give for what she does in carrying out the role. So our inquiry concerns whether the justifications available to an executioner could provide him with the kind of justification necessary for him to take pride in (...) what he does. If they cannot, I argue, this sheds some light on their adequacy as justifications. The main argument of the paper is that social control arguments for the death penalty fail to provide an adequate justification. I also give some consideration to retributive justifications. The argument is developed through close attention to the depiction of Albert Pierrepoint in the film, Pierrepoint: The Last Hangman. (shrink)

The observed complexity of nature is often attributed to an intrinsic propensity of matter to self-organize under certain (e.g., dissipative) conditions. In order better to understand and test this vague thesis, we define complexity as “logical depth,” a notion based on algorithmic information and computational time complexity. Informally, logical depth is the number of steps in the deductive or causal path connecting a thing with its plausible origin. We then assess the effects of dissipation, noise, and spatial and other symmetries (...) of the initial conditions and equations of motion on the asymptotic complexity-generating abilities of statistical-mechanical model systems. We concentrate on discrete, spatially-homogeneous, locally-interacting systems such as kinetic Ising models and cellular automata. (shrink)

Examining the author’s own experiences of narcotics addiction reveals certain aspects of the addicted mentality that have strong ethical valence. In general, this shows that addiction is not a state fundamentally characterized by lack. The rudiments of this position are found in some contemporary philosophy of addiction; also, it is contrasted with a common widely held mistaken view. Addiction should instead be understood in continuity with and as illuminating the nature of human personhood and subjectivity. Under a phenomenology specific to (...) the author’s experience, addiction appears as a mode of experience that has an unmanageable overflow of narratives created as discourses concerning people, events, thoughts, and feelings. (shrink)