Teleosemantics asserts that mental content is determined by natural selection. The thesis is that content is fixed by the historical conditions under which certain cognitive mechanisms – those that produce and those that interpret (respond to) representational states – were selectively successful. Content is fixed by conditions of selective success. The thesis of this paper is that teleosemantics is mistaken, that content cannot be fixed by conditions of selective success, because those conditions typically outnumber the intentional objects within a given (...) representational state. To defend against this excess, advocates of teleosemantics must attempt to privilege some conditions of success while ignoring others. This results in selective explanations that aread hoc,thereby depriving teleosemantics of the virtues it hoped to inherit from the theory of evolution by natural selection, including its alleged naturalistic credentials. (shrink)

Being human while trying to scientifically study human nature confronts us with our most vexing problem. Efforts to explicate the human mind are thwarted by our cultural biases and entrenched infirmities; our first-person experiences as practical agents convince us that we have capacities beyond the reach of scientific explanation. What we need to move forward in our understanding of human agency, Paul Sheldon Davies argues, is a reform in the way we study ourselves and a long overdue break with (...) traditional humanist thinking. Davies locates a model for change in the rhetorical strategies employed by Charles Darwin in _On the Origin of Species_. Darwin worked hard to anticipate and diminish the anxieties and biases that his radically historical view of life was bound to provoke. Likewise, Davies draws from the history of science and contemporary psychology and neuroscience to build a framework for the study of human agency that identifies and diminishes outdated and limiting biases. The result is a heady, philosophically wide-ranging argument in favor of recognizing that humans are, like everything else, subjects of the natural world—an acknowledgement that may free us to see the world the way it actually is. (shrink)

A persistent boast of the historical approach to functions is that functional properties are normative. The claim is that a token trait retains its functional status even when it is defective, diseased, or damaged and consequently unable to perform the relevant task. This is because historical functional categories are defined in terms of some sort of historical success -- success in natural selection, typically -- which imposes a norm upon the performance of descendent tokens. Descendents thus are supposed to perform (...) the associated task even when they cannot. The conceit, then, is that malfunctions are explicable in terms of historical success. The aim of this paper is to challenge this conceit. My thesis is that the historical approach to functions lacks the resources with which to account for the possibility of malfunctions. If functional types are defined in terms of historical success, then tokens that lack the defining property due to defect, and tokens that have lost the defining property due to disease or damage, are excluded from the functional category. Historically based malfunctions, in consequence, are impossible. The historical approach is no better than its non-historical competitors in accounting for the presumed normativity of functional properties. (shrink)

The social exchange theory of reasoning, which is championed by Leda Cosmides and John Tooby, falls under the general rubric “evolutionary psychology” and asserts that human reasoning is governed by content-dependent, domain-specific, evolutionarily-derived algorithms. According to Cosmides and Tooby, the presumptive existence of what they call “cheater-detection” algorithms disconfirms the claim that we reason via general-purpose mechanisms or via inductively acquired principles. We contend that the Cosmides/Tooby arguments in favor of domain-specific algorithms or evolutionarily-derived mechanisms fail and that the notion (...) of a social exchange rule, which is central to their theory, is not correctly characterized. As a consequence, whether or not their conclusion is true cannot be established on the basis of the arguments they have presented. (shrink)

Teleosemantics asserts that mental content is determined by natural selection. The thesis is that content is fixed by the historical conditions under which certain cognitive mechanisms—those that produce and those that interpret representational states—were selectively successful. Content is fixed by conditions of selective success. The thesis of this paper is that teleosemantics is mistaken, that content cannot be fixed by conditions of selective success, because those conditions typically outnumber the intentional objects within a given representational state. To defend against this (...) excess, advocates of teleosemantics must attempt to privilege some conditions of success while ignoring others. This results in selective explanations that are ad hoc, thereby depriving teleosemantics of the virtues it hoped to inherit from the theory of evolution by natural selection, including its alleged naturalistic credentials. (shrink)

Evolutionary Psychology as Maladapted Psychology ROBERT C. RICHARDSON Cambridge, MA: MIT Press, 2007 248 pages, ISBN: 0-262-18260-2 (hbk); $30.00 “Just about anything is consistent with some evolut...

To ‘Darwinize’ a debunking argument is to broaden and thereby strengthen it in ways inspired by Charles Darwin. It is to employ Darwinian strategies that converge on the conclusion that certain putative phenomena – the reality of stance‐independent moral properties, for instance – are illusory or epistemically problematic for animals like us. The aim of this essay is to defend one such strategy and illustrate its power relative to most evolutionary debunking arguments currently on offer.

This dissertation is concerned with two general issues. A theory of functional or teleological properties, as possessed by natural objects, grounded in the theory of evolution by natural selection. This I refer to as the evolutionary theory of functions. A cluster of theories in philosophy of mind which attempt to explicate intentionality--the representational powers of mental phenomena--in terms of evolutionary functions. ;The aim of this dissertation is threefold. To develop a version of the evolutionary theory of functions in which the (...) proper role of evolution by natural selection is made fully explicit. To defend two theses in philosophy of biology, namely that the evolutionary theory of functions, when properly articulated, cannot justify the attribution of malfunctions to any natural objects, and that the evolutionary theory of functions justifies the attribution of evolutionary functions only to those organismic traits that directly causally engage the relevant selective demands, and hence does not justify the attribution of any evolutionary functions to paradigmatically functional traits such as hearts, kidneys, etc. To defend two analogous these in philosophy of mind, namely that the evolutionary theory of functions, insofar as it cannot account for malfunctions, cannot account for misrepresentations , and that the evolutionary theory of functions warrants the attribution of evolutionary functions to just those effects of the mind which directly engage the organism with its environment, but not to those mechanisms or states of the mind concerned with representational contents. ;A secondary aim is to argue that the most developed view of evolutionary functions in the recent literature--a view presented in Millikan --is inadequate on internal grounds. ;The general conclusion of the dissertation is twofold. First, the evolutionary theory of functions is restricted in surprising ways; this is an important result in philosophy of biology. Second, and as a consequence of the first, the evolutionary theory of functions is of no avail in theories of intentionality; this is an important result in philosophy of mind. (shrink)

Thomas Jefferson and Philosophy: Essays on the Philosophical Cast of Jefferson’s Writings is a collection of essays on topics that relate to philosophical aspects of Jefferson’s thinking over the years. Much historical insight is given to ground the various philosophical strands in Jefferson’s thought and writing on topics such as political philosophy, moral philosophy, slavery, republicanism, wall of separation, liberty, educational philosophy, and architecture.

Fred Dretske asserts that the conscious or phenomenal experiences associated with our perceptual states—e.g. the qualitative or subjective features involved in visual or auditory states—are identical to properties that things have according to our representations of them. This is Dretske's version of the currently popular representational theory of consciousness . After explicating the core of Dretske's representational thesis, I offer two criticisms. I suggest that Dretske's view fails to apply to a broad range of mental phenomena that have rather distinctive (...) subjective or qualitative features. I also suggest that Dretske's view, in identifying conscious experiences with features of our perceptual states, casts its aim too low. It deflates further than it should and, in consequence, fails to capture what are arguably some of the most important phenomena associated with our conscious lives. (shrink)

Andrews et al. subscribe to the view that distinguishing selectionist from nonselectionist hypotheses – or, distinguishing adaptations from mere spandrels or exaptations – is important to the study of psychology. I offer three reasons for thinking that this view is false; that considerations of past selective efficacy have little to contribute to inquiry in psychology.

The aim of this paper is to clarify and critically assess the methods of evolutionary psychology, and offer a sketch of an alternative methodology. My thesis is threefold. (1) The methods of inquiry unique to evolutionary psychology rest upon the claim that the discovery of theadaptive functions of ancestral psychological capacities leads to the discovery of thepsychological functions of those ancestral capacities. (2) But this claim is false; in fact, just the opposite is true. We first must discover the psychological (...) functions of our psychological capacities in order to discover their adaptive functions. Hence the methods distinctive of evolutionary psychology are idle in our search for the mechanisms of the mind. (3) There are good reasons for preferring an alternative to the methods of evolutionary psychology, an alternative that aims to discover the functions of our psychological capacities by appeal to the concept of awhole psychology. (shrink)

Sober (1992) has recently evaluated Brandon's (1982, 1990; see also 1985, 1988) use of Salmon's (1971) concept of screening-off in the philosophy of biology. He critiques three particular issues, each of which will be considered in this discussion.

Review of Paul Sheldon Davies *Norms of Nature* (2001).

A critical review of what I see as a controversial interpretation of the nature and aims of Darwin’s rhetorical strategy and a narrow and controversial naturalist manifesto.

With neuroscience and psychology making significant advances in contemporary brain research, fundamental questions concerning the nature of human life and activity will become evermore critical as we proceed further into the twenty-first century. Put simply, are we creatures who exercise some genuine degree of freedom and agency in the world or are we creatures whose actions are largely if not wholly determined by biological, neurological, and psychological factors far below the radar of our conscious awareness? This article explores this important (...) and timely question by examining the views of Paul Sheldon Davies, Reinhold Niebuhr, and Alfred North Whitehead. Drawing on contemporary science, Davies dismisses Niebuhr’s existential analysis of human existence and any meaningful conception of human agency. Succinctly stated, can one take both the results of contemporary neuroscience seriously, as Davies does, and the affirmation of human agency seriously, as Niebuhr does? The thesis of this essay is that Whitehead offers a constructive bridge between Davies’ affirmation of science and Niebuhr’s existential account of human existence. In sum, it is argued that Whitehead’s process philosophy enables us to affirm the genuine influence of nonconscious factors in experience as well as the authenticity of human agency and subjectivity in the world. (shrink)

Historical accounts of biological function are thought to have, as a point in their favour, their being able to accommodate malfunction. Recently, this has been brought into doubt by Paul Sheldon Davies’s argument for the claim that both selected malfunction (that of the selected functions account) and weak etiological malfunction (that of the weak etiological account), are impossible. In this paper I suggest that in light of Davies’s objection, historical accounts of biological function need to be adjusted to accommodate (...) malfunction. I propose a historical account which places two conditions on membership of a functional kind. My claim is that it is in virtue of a trait’s meeting these conditions that it is a member of a functional kind, and can thus malfunction. I suggest that a version of my proposal can be adopted by both the selected effects and weak etiological theorists, and so conclude that such a proposal meets Davies’s objection. (shrink)

In this paper, we argue that promoting patient values is a legitimate goal of medicine. Our view offers a justification for certain current practices, including birth control and living organ donation, that are widely accepted but do not fit neatly within the most common extant accounts of the goals of medicine. Moreover, we argue that recognising value promotion as a goal of medicine will expand the scope of medical practice by including some procedures that are sometimes rejected as being outside (...) the scope of acceptable medical practice, such as certain forms of physician-assisted death. We then rebut some common and possible objections to this view. Our aim is not to argue that other accounts are mistaken—except when they argue for a single goal that does not include patient values—but rather to show that value promotion should play a more central role in discussions about the goals of medicine. (shrink)

By using tissue typing in conjunction with preimplantation genetic diagnosis doctors are able to pick a human embryo for implantation which, if all goes well, will become a “saviour sibling”, a brother or sister capable of donating life-saving tissue to an existing child.This paper addresses the question of whether this form of selection should be banned and concludes that it should not. Three main prohibitionist arguments are considered and found wanting: the claim that saviour siblings would be treated as commodities; (...) a slippery slope argument, which suggests that this practice will lead to the creation of so-called “designer babies”; and a child welfare argument, according to which saviour siblings will be physically and/or psychologically harmed. (shrink)

Book Reviewed in this article: Traditional Sayings in the Old Testament. By Carole R. Fontaine. Pp. viii, 279, Sheffield, The Almond Press, 1982, £17.95, £8.95. The First Day of the New Creation: The Resurrection and the Christian Faith. By Vesilin Keisch. Pp.206, Crestwood, New York, St Vladimirs Seminary Press, 1982, £6.25. The First Day of the New Creation: The Resurrection and the Christian Faith. By Vesilin Keisch. Pp.206, Crestwood, New York, St Vladimir's Seminary Press, 1982, £6.25. The Resurrection of Jesus: (...) A Jewish Perspective. By Pinchas Lapide. Pp.160, London, SPCK, 1983, 4.95. Easter Enigma. By John Wenham. Pp.162, Exeter, Paternoster Press, 1984, £2.95. The Anastasis: the Resurrection of Jesus as an Historical Event. By J. Duncan M. Derrett. Pp.xiv, 166, Shipston‐on‐Stour, P. Drinkwater, 1982, £5.00. The Open Heaven: A Study of Apocalyptic in Judaism and Early Christianity. By Christopher Rowland. Pp. xii, 562, London, SPCK, 1982, £22.50. Christianity Rediscovered: An Epistle from the Masai. By Vincent J. Donovan. Pp. viii, 200, London, SCM Press, 1982, £5.50. Basics of a Roman Catholic Theology. By William A. Van Roo, S.J. Pp.387, Rome, Gregorian University Press, 1982, $21.00. Charisms and Charismatic Renewal: a Biblical and Theological Study. By Francis A. Sullivan. Pp.184, Dublin, Gill & Macmillan, 1982, £5.95. Holiness and Politics. By Peter Hinchliff. Pp.214, London, Darton, Longman and Todd, 1982, £8.95. Rational Theology and the Creativity of God. By Keith Ward. Pp.240, Oxford, Blackwell, 1982, £14.00. The Point of Christology. By S.M. Ogden. Pp.xii, 193, London, SCM Press, 1982, £5.95. Fullness of Humanity: Christ's Humanness and Ours. By T.E. Pollard. Pp.126, Sheffield, The Almond Press, 1982, £9.95, £5.95. Milton's Good God: A Study in Literary Theodicy. By Dennis Richard Danielson. Pp.xi, 292, Cambridge University Press, 1982, £20.00. Biblical Tradition in Blake's Early Prophecies: The Great Code of Art. By Leslie Tannenbaum. Pp.xiii, 373, Princeton University Press, 1982, £17.60. The Inner Journey of the Poet and Other Papers. By Kathleen Raine, edited by Brian Keeble. Pp.xii, 208, London, George Allen and Unwin, 1982, £9.95.iVol. 34: Horayot and Niddah. Translated by Jacob Neusner. Pp.xiii, 243, Chicago, The University of Chicago Press, 1982, £17.50. Holy Land Pilgrimage in the Later Roman Empire A.D. 312–460. By Ed. Hunt. Pp. £+ 269, Oxford University Press, 1982, £16.50. Constantine versus Christ: The Triumph of Ideology. By Alistair Kee. Pp.186, London, SCM Press, 1982, £5.95. Society and the Holy in Late Antiquity. By Peter Brown. Pp.347, London, Faber and Faber, 1982, £10.50. Elishe: History of Vardan and the Armenian War. Translation and commentary by Robert W. Thomson. Pp.x, 353, 1 map, Cambridge, Harvard University Press, 1982, £21.00. Ireland in Early Mediaeval Europe: Studies in Memory of Kathleen Hughes. Edited by Dorothy Whitelock, Rosamond McKitterick and David Dumville. Pp.x, 406, Cambridge University Press, 1982, £39.00. Letters from Ireland 1228–1229 by Stephen of Lexington. Translated with an introduction by B.W. O'Dwyer. Pp.vii, 292, Kalamazoo, Cistercian Publications, 1982, $24.95. The Occupation of Celtic Sites in Ireland by the Canons Regular of St Augustine and the Cistercians. By Geraldine Carville. Pp.ix, 158, Kalamazoo, Cistercian Publications, 1982, $13.95. Chartres: The Masons who built a Legend. By John James. Pp.200, London, Routledge and Kegan Paul, 1982, £17.50. Temples, Churches and Mosques: A Guide to the Appreciation of Religious Architecture. By J.G. Davies. Pp.x, 262, Oxford, Basil Blackwell, 1982, £12.50. The Murdered Magicians: The Templars and their Myth. By Peter Partner. Pp.xxi, 209. Oxford University Press, 1982, £12.95. The Italian Crusades: The Papal‐Angevin Alliance and the Crusades Against Christian Lay Powers, 1254–1343. By Norman Housley. Pp.xi, 293, Oxford, Clarendon Press: Oxford University Press, 1982, £17.50. The Westminster Chronicle, 1381–1394. Edited and Translated by L.C. Hector and Barbara F. Harvey. Pp.lxxvii, 563. Oxford, the Clarendon Press, 1982, £42.00. Frömmigkeitstheologie am Anfang des 16. Jahrhunderts. By Berndt Hamm. Pp.xv, 378, Tübingen, J.C.B. Mohr, 1982, 168 DM. Erasmi Opera omnia, IX, 2: Desiderii Erasmi Roterodami Apologia respondens ad ea quae Iambus Lopis Stunica taxavrat in prima duntaxat Novi Testamenti aeditione. Edited by Henk Jan de Jonge. Pp.292, Amsterdam, North‐Holland Publishing Company, 1983, 280 guilders. The Christian Polity of John Calvin. By Harro Höpfl. Pp.x, 303, Cambridge University Press, 1982, £27.50. Concerning the Eternal Predestination of God. By John Calvin, translated with an Introduction by J.K.S. Reid. Pp.191, Cambridge, James Clarke & Co., 1982, £5.95. Spanish Protestants and Reformers in the Sixteenth Century: A Bibliography. By A. Gordon Kinder. Pp.108, London, Grant & Cutler, 1983, £6.80. Moderate Puritans and the Elizabethan Church. By Peter Lake. Pp.viii, 357, Cambridge University Press, 1982, £27.50. Resistance and Compromise: The Political Thought of Elizabethan Catholics. By Peter Holmes. Pp.viii, 279, Cambridge University Press, 1982, £22.50. Dutch Puritanism: A History of English and Scottish Churches of the Netherlands in the Sixteenth and Seventeenth Centuries. By Keith L. Sprunger. Pp.xiii, 485, Leiden, E.J. Brill, 1982, 172 guilders. John Toland and the Deist Controversy. By Robert E. Sullivan. Pp.viii, 355, Cambridge, Harvard University Press, 1982, £19.95. Radical Sects of Revolutionary New England. By Stephen A. Marini. Pp. 213, Cambridge, Harvard University Press, 1982, £11.55. Religion and Society in North America: An Annotated Bibliography. Edited by Robert deV: Brunkow. Pp.xi, 515, Santa Barbara, ABC‐Clio; Oxford, EBC‐Clio, 1983, £57.75. Charles Lowder and the Ritualist Movement. By Lida Ellsworth. Pp.vi, 234, London, Darton, Longman & Todd, 1982, £17.95. How the Pope became Infallible: Pius IX and the Politics of Persuasion. By August Bernhard Hasler. Pp.xi, 383, New York, Doubleday, 1981, $14.95; London, Sheldon Pres, 1982, £15.00. Hauptsache der Papst ist katholisch. Edited by Bruno Nies. Pp.104, Salzburg, Otto Müller, 1982, öS 140. Religious Change in Contemporary Poland: Secularization and Politics. By Maciej Pomian‐Srednicki. Pp.227, London, Routledge & Kegan Paul, 1982, £12.50. World Christian Encyclopedia: A Comparative Survey of Churches and Religions in the Modern World. Edited by David B. Barrett. Pp.1010, Nairobi, Oxford University Press, 1982, £55.00. Probability and Evidence. By Paul Horwich. Pp.vii, 146, Cambridge University Press, 1982, £15.00. Philosophical Foundations of Probability Theory. By Roy Weatherford. Pp.xi, 282, London, Routledge and Kegan Paul, 1982, £15.00. The Origins of Greek Thought. By Jean‐Pierre Vernant. Pp.144, London, Methuen, 1982, £9.95. Portraying Analogy. By J.F. Ross. Pp.xi, 244, Cambridge University Press, 1981, £20.00. The Marriage of East and West. By Bede Griffiths. Pp.224, London, Collins, 1982, £5.95. The Religious Experience: A Socio‐Psychological Perspective. By C.D. Batson & W.L. Ventis Pp.ix, 356, New York, Oxford University Press, 1982, £18.50,£9.95. (shrink)

This study accounts for disparate portrayals of divine destroyer Śiva in the normative Rāmāyaṇa and Mahābhārata as opposed to Kālidāsa’s amatory Kumārasaṃbhava and Raghuvaṃśa by contrasting the primary and secondary Sanskrit epic authors’ respective reliances on the Mānavadharmaśāstra and the Kāmasūtra. By arguing, per Richard Johnson’s postpoststructuralism, that these mythological and philosophical differences deliberately reflect those poets’ specific sociohistorical contexts, this inquiry accounts more accurately for Śiva’s classical-epic depictions than do Stella Kramrisch’s and Wendy Doniger [O’Flaherty]’s investigations informed by Claude (...) Lévi-Strauss’s structuralism and Don Handelman and David Shulman’s researches influenced by Gilles Deleuze and Félix Guattari’s poststructuralism. The present work, in revising such prevailing Indological notions as Romila Thapar’s traditional construal of the “classical,” Donald R. Davis Jr.’s anthropocentric definition of puruṣārtha (human aim), and Sheldon Pollock’s unvarying characterization of śāstras (treatises), models a historically aware approach that appreciates the interrelationship of mythological philosophy and philosophical mythology. (shrink)

In this groundbreaking work, Christa Davis Acampora offers a profound rethinking of Friedrich Nietzsche’s crucial notion of the agon. Analyzing an impressive array of primary and secondary sources and synthesizing decades of Nietzsche scholarship, she shows how the agon, or contest, organized core areas of Nietzsche’s philosophy, providing a new appreciation of the subtleties of his notorious views about power. By focusing so intensely on this particular guiding interest, she offers an exciting, original vantage from which to view this (...) iconic thinker: Contesting Nietzsche. Though existence—viewed through the lens of Nietzsche’s agon—is fraught with struggle, Acampora illuminates what Nietzsche recognized as the agon’s generative benefits. It imbues the human experience with significance, meaning, and value. Analyzing Nietzsche’s elaborations of agonism—his remarks on types of contests, qualities of contestants, and the conditions in which either may thrive or deteriorate—she demonstrates how much the agon shaped his philosophical projects and critical assessments of others. The agon led him from one set of concerns to the next, from aesthetics to metaphysics to ethics to psychology, via Homer, Socrates, Saint Paul, and Wagner. In showing how one obsession catalyzed so many diverse interests, Contesting Nietzsche sheds fundamentally new light on some of this philosopher’s most difficult and paradoxical ideas. (shrink)

A great deal of interest and excitement surround the interface between the philosophy of biology and the philosophy of psychology, yet the area is neither well defined nor well represented in mainstream philosophical publications. This book is perhaps the first to open a dialogue between the two disciplines. Its aim is to broaden the traditional subject matter of the philosophy of biology while informing the philosophy of psychology of relevant biological constraints and insights.The book is organized around six themes: functions (...) and teleology, evolutionary psychology, innateness, philosophy of mind, philosophy of science, and parallels between philosophy of biology and philosophy of mind. Throughout, one finds overlapping areas of study, larger philosophical implications, and even larger conceptual ties. Woven through these connections are shared concerns about the status of semantics, scientific law, evolution and adaptation, and cognition in general. Contributors André Ariew, Mark A. Bedau, David J. Buller, Paul Sheldon Davies, Stephen M. Downes, Charbel Niño El-Hani, Owen Flanagan, Peter Godfrey-Smith, Todd Grantham, Valerie Gray Hardcastle, Gary Hatfield, Daniel W. McShea, Karen Neander, Shaun Nichols, Antonio Marcos Pereira, Tom Polger, Lawrence A. Shapiro, Kim Sterelny, Robert A. Wilson, William C. Wimsatt. (shrink)

An existential psychodynamic theory is presented based on Ernest Becker's claim that self‐esteem and cultural worldviews function to ameliorate the anxiety associated with the uniquely human awareness of vulnerability and mortality. Psychological equanimity is hypothesized to require (1) a shared set of beliefs about reality that imbues the universe with stability, meaning, and permanence; (2) standards by which individuals can judge themselves to be of value; and (3) promises of safety and the transcendence of death to those who meet the (...) standards of value. An empirical research program in support of this theory is then described, and the personal and interpersonal implications of these ideas are briefly considered. (shrink)

Quantum philosophy, a peculiar twentieth-century malady, is responsible for most of the conceptual muddle plaguing the foundations of quantum physics. When this philosophy is eschewed, one naturally arrives at Bohmian mechanics, which is what emerges from Schrodinger's equation for a nonrelativistic system of particles when we merely insist that 'particles' means particles. While distinctly non-Newtonian, Bohmian mechanics is a fully deterministic theory of particles in motion, a motion choreographed by the wave function. The quantum formalism emerges when measurement situations are (...) analyzed according to this theory. When the quantum formalism is regarded as arising in this way, the paradoxes and perplexities so often associated with quantum theory simply evaporate.Bohr's ... approach to atomic problems ... is really remarkable. He is completely convinced that any understanding in the usual sense of the word is impossible. Therefore the conversation is almost immediately driven into philosophical questions, and soon you no longer know whether you really take the position he is attacking, or whether you really must attack the position he is defending. (shrink)