Hebbian mechanisms are justified according to their functional utility in an evolutionary sense. The selective advantage of correlating content-contingent stimuli reflects the putative common cause of temporally or spatially contiguous inputs. The selective consequences of such correlations are discussed by using examples from the evolution of signal form in sexual selection and model-mimic coevolution. We suggest that evolutionary justification might be considered in addition to neurophysiology plansibility when constructing representational models.

Behavioral ecologists often assume that natural selection will produce organisms that make optimal decisions. In the context of information processing, this means that the behavior of animals will be consistent with models from fields such as signal detection theory and Bayesian decision theory. We discuss work that applies such models to animal behavior and use the case of Bayesian updating to make the distinction between a description of behavior at the level of optimal decisions and a mechanistic account of how (...) decisions are made. The idea of ecological rationality is that natural selection shapes an animal's decision mechanisms to suit its environment. As a result, decision-making mechanisms may not perform well outside the context in which they evolved. Although the assumption of ecological rationality is plausible, we argue that the exact nature of the relationship between ecology and cognitive mechanism may not be obvious. (shrink)

Gangestad & Simpson review sexual selection theory and discuss their work on fluctuating asymmetry and mate preference in humans. We question some aspects of their account and mention problems with the data. We also suggest that more theoretical work on complex but realistic mating systems is required.

Books Reviewed in this Article: Theological Investigations, Vol. XVIII: God and Revelation. By Karl Rahner. Pp.vi, 304, London, Darton, Longman and Todd, 1984, £18.50. Theological Investigations, Volume XIX: Faith and Ministry. By Karl Rahner. Pp.vi, 282, London, Darton, Longman & Todd, 1984, £18.50. Theological Investigations: Volume XX: Concern for the Church. By Karl Rahner. Pp.vi, 191, London, Darton, Longman & Todd, 1981, £14.50. Concise Theological Dictionary. Edited by Karl Rahner and Herbert Vorgrimler. Pp.541, London, Burns & Oates, 1983, £12.50. A (...) New Dictionary of Christian Theology. Edited by Alan Richardson and John Bowden. Pp.xvii, 614, London, SCM Press, 1983, £19.50. The God of Forgiveness and Healing in the Theology of Karl Rahner. By J.N. King, Pp.93, Washington, University Press of America, 1982, $17.50, $6.75. In Search of Humanity, A Theological and Philosophical Approach. By John Macquarrie. Pp.vii, 280, London, SCM Press, 1982, £8.50. Faith and the Mystery of God. By Maurice Wiles. Pp.viii, 146, London, SCM Press, 1982, £4.50. Trinity and Temporality: The Christian Doctrine of God in the Light of Process Theology and the Theology of Hope. By John J. O'Donnell. Pp.xii, 215, Oxford University Press, 1983, £15.00. The Cosmic Christ in Origen and Teilhard de Chardin: A comparative Study. By James A. Lyons and edited by Maurice Wiles. Pp.xii, 236, Oxford University Press, 1982, £13.50. Grounded in Love: Sacramental Theology in an Ecumenical Perspective. By Frans Josef van Beeck. Pp.x, 151, Washington, University Press of America, 1982, $19.50, $9.25. Justification: The Author's First Book reissued with a New Introductory Chapter and the Original Response of Karl Barth. By Hans Küng. Pp.xlvi, 332, London, Burns and Oates, 1982, no price given. Reality and Evangelical Theology. By T.F. Torrance. Pp.174, Philadelphia, Westminster Press, 1982, $8.95. The Quest for the Historical Israel: Reconstructing Israel's Early History. By George W. Ramsey. Pp.xiv, 193, London, SCM Press, 1982, £5.50. Cantico del Cantici: Interpretatio Ludica. By Enrica Salvaneschi. Pp.140. Genoa, II Melangolo, 1982, 15, 000 Lire. Love Lyrics from the Bible: A Translation and Literary Study of the Song of Songs. By Marcia Falk. Pp.142, Sheffield, Almond Press, 1982, £14.95, £5.95. Old Testament Wisdom: An Introduction. By James L. Crenshaw. Pp.286, London, SCM Press, 1982, £5.95. The Sciences and Theology. Edited by A.R. Peacocke. Pp.xviii, 309, Stocksfield, Oriel Press, 1982, £14.00. Vision and Character: A Christian Educator's Alternative to Kohlberg. By C.R. Dykstra. Pp.viii, 160, Leominster, Fowler Wright Books, 1981, £4.45. Aristotle's Eudemian Ethics, Books I, II & III. Translated with a commentary by Michael Woods. Pp.xii, 234, Oxford, Clarendon Press: Oxford University Press, 1982, £11.50. Kant's Theory of Mind: An Analysis of the Paralogisms of Pure Reason. By Karl Ameriks. Pp.ix, 314, Oxford, Clarendon Press, 1982, £15.00. Heidegger's‘Being and Time’and the Possibility of Political Philosophy. By Mark Blitz. Pp.260, Ithaca, Cornell University Press, 1981, £13.75. Symbol as Sense: New Approaches to the Analysis of Meaning. Edited by Mary Le Cron Foster and Stanley H. Brandes. Pp.xvi, 416, New York, Academic Press, 1980, £19.60. The God Within. By Harry R. Klocker. Pp.x, 147, Washington, University Press of America, 1982, $19.00, $9.25. The Philosophical Frontiers of Christian Theology: Essays Presented to D.M. MacKinnon. Edited by Brian Hebblethwaite and Stewart Sutherland. Pp.ix, 252, Cambridge University Press, 1982, £17.50. Jews, Pagans and Christians in Conflict. By David Rokeah. Pp.232, Jerusalem, The Magnes Press, The Hebrew University, Leiden; E.J. Brill, 1982, 94 gld. Religion, Law, and the Growth of Constitutional Thought 1150–1650. By Brian Tierney. Pp.xi, 114, Cambridge University Press, 1982, £12.50. St John of the Cross: The Life and Thought of a Christian Mystic. By Alain Cugno. Pp.vi, 153, London, Burns & Oates, 1982, £6.95. Meister Eckhart: The Essential Sermons, Commentaries, Treatises and Defense. Translated by Edmund Colledge and Bernard McGinn. Pp.xviii, 360, London, SPCK, 1981, £8.50. Francisco de Osuna: the Third Spiritual Alphabet. Translated by May E. Giles. Pp.xvi, 624, London, SPCK, 1981, £12.50. Rome and the Anglicans. Edited with a Postscript by Wolfgang Haase. Pp.301, Berlin, Walter de Gruyter, 1982, 138 DM. The Westminster Confession in the Church today: Papers Prepared for the Church of Scotland Panel on Doctrine. Edited by Alasdair I.C. Heron. Pp.vii, 154, Edinburgh, Saint Andrew Press, 1982, £4.00. Essaying Montaigne: A Study of the Renaissance Institution of Writing and Reading. By John O'Neill, Pp.ix, 244, London, Routledge and Kegan Paul, 1982, £12.50. Rousseau after 200 years: Proceedings of the Cambridge Bicentennial Colloquium. Edited by R.A. Leigh. Pp.xv, 299, Cambridge University Press, 1982, £30.00 An American Experience of God: The Spirituality of Isaac Hecker. By John Farina. Pp.xii, 217, New York, Paulist Press, 1981, $11.95. Hecker Studies: Essays on the Thought of Isaac Hecker. Edited by John Farina. Pp.vii, 243, New York, Paulist Press, 1983, $6.95. (shrink)

Edith Stein lived an unconventional life. Born into a devout Jewish family, she drifted into atheism in her mid teens, took up the study of philosophy, studied with Edmund Husserl, the founder of phenomenology, became a pioneer in the women's movement in Germany, a military nurse in World War I, converted from atheism to Catholic Christianity, became a Carmelite nun, was murdered at Auschwitz-Birkenau in 1942, and canonized by Pope John Paul II.

In lieu of an abstract, here is a brief excerpt of the content:Reviews 91 THE ROOTS OF MODERN LOGIC ALASDAIR URQUHART Philosophy/ U. ofToronto Toronro, ON, Canada M5S IAI [email protected] I. Grattan-Guinness. The Searchfor Mathematical Roots,r870--r940: logics, Set Theoriesand the Foundations of Mathematicsfrom Cantor through Russellto Godel Princeron: Princeton U. P.,2000. Pp. xiv,690. us$45.oo. Grattan-Guinness's new hisrory of logic is a welcome addition to the literature. The title does not quite do justice ro the book, since it begins with (...) the prehistory of English work in algebraic logic, including the work of the French analycicalschool, and extends to just after Godel's great incompleteness paper of 1931.The core of the book, though, is the philosophical and mathematical developmems leading up to and immediately following from chework ofWhicehead and Russell.Russell is ac chehearcof che book, and as a whole che hisrory forms an imporranr conrribucion ro Russell scudies. Commemarors on Russell have often confined themselves to a rather narrow hisrorical perspeccivein which Russell is seen as the (problemacic) heir of Gottlob Frege, and few ocher hisrorical figures (ocher than Peano) emer imo che picture. Graccan-Guinness corrects chis hisrorica.limbalance by placing Russell in che mucl1 wider context of the development of machemacics on che continent, and in parricu.laremphasizing strongly che key influence of Camor on 92 Reviews Russell's work. Cantor has usually received short shrift from philosophers, as unlike Frege,he appears rarher naive from rhe philosophical point of view. The story proper begins in Chaprer 2 wirh L-igrange'sversion of analysis in which rhe basic concepts were to be defined in rerms of algebraic manipularion of power series. This lead to rhe founding of rhe Analyrical Socierywhere Babbage, Herschel and Peacock were active. It is in chis English tradicion of algebraic analysis char rhe pioneering work of De Morgan and Boole found irs roors. Grarran-Guinness givesa derailed account of the work of both logicians, although his discussion of Boole's merhods does not seem entirely adequate. The question is:what are we to make of Boole'spuzzling insistence chat expressions like x + y are "uninterpretable", while he nevertheless manipulated them freely in his mathematical derivations? It is not correct to say that the addition sign can only link disjoint class symbols, since ir is belied by Boole's formal pracrice. A possible solution has been suggested by Hailperin, in his book on Boole's logic, in which he proposes interpreting the "uninterpretable" expressions as denoting signed mulrisets. Oddly, Grattan-Guinness refers to Hailperin 's work,' bur elsewhere (p. 42) adopts rhe view that Boole's addition sign could only link disjoint classes.The chapter concludes with brief accounts of the work of Cauchy, Weierstrass and Bolz.'lno. The next chapter is a detailed account of rhe work of Cantor and his creation of Mengenlehre. The origins of set theory in the theory of trigonometrical series, and rhe ensuing discoveryof rransfinire ordinal and cardinal numbers, are described clearly and succinctly. In addition, the chapter contains an account of Dedekind's philosophy of arithmetic and Cantor's philosophy of mathematics. Cantor's philosophy is an uneasy blend of formalism, platonism and idealism, and has tmderstandably aroused little enthusiasm among philosophers of matl1ematics, alrhough Michael Hallerr has recently smdied it in detail. GrammGuinness emphasizes, rhough, Cantor's magnificent marhematica.l achievements, in defining and clarifying basic conceprs such as measure, dimension and cardinality of sets. Chaprer 4 is a rather miscellaneous chapter, in which six partly independent, partly interrwined stories are told. It begins with developments in sectheory in Germany and France up to the turn of rhe century, goes on to discuss American logic in rhe work of C. S. Peirce and his students, and continues the rheme of algebraic logic with Schroder and his logic of relatives. The remainder of the chapter is given over to Frege, Husserl and Hilbert. The section on Frege is one of rhe more idiosyncratic parts of the book. Grattan-Guinness distinguishes berween Frege, "a mathematician who wrore in ' T Hailperin, Book's logic and Probability, 2nd ed. (Amsterdam: North-Holland, 1986). Reviews 93 German, in a markedly Platonic spirit", and Frege, "a philosopher of language and founder of... (shrink)

Around 1998, internet postings began appearing under the alias ‘ Timetravel_0 ’. This alias was later replaced by ‘John Titor’, and it's as such I'll designate the posts' author. Remarkably, Titor claimed to have time-travelled from 2036 on a mission to retrieve an IBM 5100 in 1975. Titor refrained from public appearances and any evidence for his story remains web-bound but before closing shop c. March 24 th 2001, he described various future events, e.g.: Y2K is a disaster. Many people (...) die on the highways when they freeze to death trying to get to warmer weather. Cancellation of the Olympics after 2004 due to world conflict. America will soon be engaged in civil war with itself; a civil war that we'll see the beginnings of during 2004 and 2005, escalating until it is indisputable by 2008. This equivocal civil war fizzles until global nuclear war kills three billion people in 2015. (shrink)

In recent decades in North American social and moral philosophy, alongside the development and discussion of widely influential theories of justice, taken as Rawls takes it as the ‘first virtue of social institutions,’ there has been a counter-movement gathering strength, one coming from some interesting sources. For some of the most outspoken of the diverse group who have in a variety of ways been challenging the assumed supremacy of justice among the moral and social virtues are members of those sections (...) of society whom one might have expected to be especially aware of the supreme importance of justice, namely blacks and women. Those who have only recently won recognition of their equal rights, who have only recently seen the correction or partial correction of long-standing racist and sexist injustices to their race and sex, are among the philosophers now suggesting that justice is only one virtue among many, and one that may need the presence of the others in order to deliver its own undenied value. Among these philosophers of the philosophical counterculture, as it were - but an increasingly large counterculture - I include Alasdair MacIntyre, Michael Stocker, Lawrence Blum, Michael Slote, Laurence Thomas, Claudia Card, Alison Jaggar, Susan Wolf and a whole group of men and women, myself included, who have been influenced by the writings of Harvard educational psychologist Carol Gilligan, whose book In a Different Voice caused a considerable stir both in the popular press and, more slowly, in the philosophical journals. (shrink)

In recent decades in North American social and moral philosophy, alongside the development and discussion of widely influential theories of justice, taken as Rawls takes it as the ‘first virtue of social institutions,’ there has been a counter-movement gathering strength, one coming from some interesting sources. For some of the most outspoken of the diverse group who have in a variety of ways been challenging the assumed supremacy of justice among the moral and social virtues are members of those sections (...) of society whom one might have expected to be especially aware of the supreme importance of justice, namely blacks and women. Those who have only recently won recognition of their equal rights, who have only recently seen the correction or partial correction of long-standing racist and sexist injustices to their race and sex, are among the philosophers now suggesting that justice is only one virtue among many, and one that may need the presence of the others in order to deliver its own undenied value. Among these philosophers of the philosophical counterculture, as it were - but an increasingly large counterculture - I include Alasdair MacIntyre, Michael Stocker, Lawrence Blum, Michael Slote, Laurence Thomas, Claudia Card, Alison Jaggar, Susan Wolf and a whole group of men and women, myself included, who have been influenced by the writings of Harvard educational psychologist Carol Gilligan, whose book In a Different Voice caused a considerable stir both in the popular press and, more slowly, in the philosophical journals. (shrink)

I discuss various theoretical issues concerning maximizing, matching, and melioration. The model of addiction based on melioration has the key feature that a reduction in drag use increases both the value of drag-taking and the value of conventional activities. I found Heyman's target article stimulating. I don't feel competent to comment on drags but I do have some thoughts, both general and specific, on the theoretical issues.

We present a general framework for analyzing the contribution to reproductive success of a behavioural action. An action may make a direct contribution to reproductive success, but even in the absence of a direct contribution it may make an indirect contribution by changing the animal's state. We consider actions over a period of time, and define a reward function that characterizes the relationship between the animal's state at the end of the period and its future reproductive success. Working back from (...) the end of the period using dynamic programming, the optimal action as a function of state and time can be found. The procedure also yields a measure of the cost, in terms of future reproductive success, of a suboptimal action. These costs provide us with a common currency for comparing activities such as eating and drinking, or eating and hiding from predators. The costs also give an indication of the robustness of the conclusions that can be drawn from a model. We review how our framework can be used to analyze optimal foraging decisions in a stochastic environment. We also discuss the modelling of optimal daily routines and provide an illustration based on singing to attract a mate. We use the model to investigate the features that can produce a dawn song burst in birds. State is defined very broadly so that it includes the information an animal has about its environment. Thus, exploration and learning can be included within the framework. (shrink)

In the theory outlined in the target article, an animal forages continuously, making sequential decisions in a world where the amount of food and its uncertainty are fixed, but delays are variable. These assumptions contrast with the risk-sensitive foraging theory and create a problem for comparing the predictions of this model with many laboratory experiments that do not make these assumptions.

Gigerenzer, Todd, and the ABC Research Group give an interesting account of simple decision rules in a variety of contexts. I agree with their basic idea that animals use simple rules. In my commentary I concentrate on some aspects of their treatment of decision rules in behavioural ecology.

Rolls discusses various adaptive explanations of physiological processes and the emotions. We give a critical analysis of some of these from the perspective of behavioural ecology. While agreeing with the approach adopted by Rolls, we identify topics that could have been better presented by making use of the existing literature.

We concentrate on two aspects of the article by Pothos & Busemeyer (P&B): the relationship between classical and quantum probability and quantum probability as a basis for rational decisions. We argue that the mathematical relationship between classical and quantum probability is not quite what the authors claim. Furthermore, it might be premature to regard quantum probability as the best practical rational scheme for decision making.

A general framework for analysing the effects of variability and the effects of interruptions on foraging is presented. The animal is characterised by its level of energetic reserves, x. We consider behaviour over a period of time [0,T]. A terminal reward function R(x) determines the expected future reproductive success of an animal with reserves x at time T. For any state x at a time in the period, we give the animal a choice between various options and then constrain it (...) to follow a background strategy. The best option is the one that maximizes expected future reproductive success. Using this framework, we show that sensitivity to variability in amount of energy gained is logically distinct from sensitivity to variability in the time at which food is obtained. We also show that incorporating interruptions results in both a preference for variability in time and a preference for a reward followed by a delay as opposed to the same delay before the reward. (shrink)

Gould and Lewontin use San Marco, Venice, to criticise the adaptationist program in biology. Following their lead, the architectural term “spandrel” is now widely used in biology to denote a feature that is a necessary byproduct of other aspects of the organism. I review the debate over San Marco and argue that the spandrels are not necessary in the sense originally used by Gould and Lewontin. I conclude that almost all the claims that Gould makes about San Marco are wrong (...) and that it is reasonable to view the architectural spandrel as an adaptation. The spandrels example has not provided a good illustration of why adaptive explanations should be avoided. In fact, it can be used as an example of how adaptive explanations can be dismissed even when there is evidence in their favour. I also discuss the use of the concept of a spandrel in biology. (shrink)

Feeling out of place because he is the only elephant who sings, Little Elephant sets off a journey to find a home where he belongs.

John Maynard Smith was the founder of evolutionary game theory. He has also been the major influence on the direction of this field, which now pervades behavioural ecology and evolutionary biology. In its original formulation the theory had three components: a set of strategies, a payoff structure, and a concept of evolutionary stability. These three key components are still the basis of the theory, but what is assumed about each component is often different to the original assumptions. We review modern (...) approaches to these components. We emphasis that if a game is considered in isolation, and arbitrary payoffs are assumed, then the payoffs may not be consistent with other components of the system which are not modelled. Modelling the whole system, including not only the focal game, but also the future behaviour of the players and the behaviour of other population members, allows a consistent model to be constructed. We illustrate this in the case of two models of parental care, showing how linking a focal game to other aspects of the system alters what is predicted. (shrink)

The purpose of this paper is to describe briefly the institutional arrangements which condition the activities of accountants in the United States; to heighten an awareness of the values which are embodied in the existing structures of accountability; to appraise the consistency with which the established ideals of society have been actualised in financial reporting, and to discern the shape of the emerging history of financial reporting in the light of new values and possibilities. I suggest that the tradition of (...) fair presentation in financial reporting is in danger of being eliminated by a purely political response to previous abuses. Mandatory accounting standards do have a role in preventing these abuses, but they can also be seen as instruments of distributive justice. To promote an awareness and discussion of the issues, I point out some of the goals and values underlying a few of the major structures designed for the distribution of economic costs and benefits. (shrink)

It is shown that in a range of models, the probability that a forager dies from starvation is, to a good approximation, an exponential function of energy reserves. Using a time and energy budget for a 19g passerine, we explore the consequences, in terms of starvation and predation, of various levels of energy reserves. It is shown that there exists an optimal level L of reserves at which total mortality (starvation plus predation) is minimized. L increases when the environment deteriorates (...) as a result of a decrease in either temperature or mean gross gain or an increase in the mean search time. The effect of combined deteriorations is greater than the sum of their individual effects. At L, the probability of predation is much higher than the probability of starvation. A simple analytic model suggests that this result will be fairly general, but also indicates conditions under which the result might not hold. (shrink)

Feeling out of place because he is the only elephant who sings, Little Elephant sets off a journey to find a home where he belongs.

Although there are some common underlying mechanisms for many nonhuman behavioural asymmetries, the evidence at present is not compelling for commonalities in cerebral organisation across vertebrates. Phylogenetic analysis of detour behaviour in fish suggests that more closely related species are not particularly similar in the direction of turning; contingency and demands of ecological niches may better explain such asymmetries.