The doctrine of double effect continues to be an important tool in bioethical casuistry. Its role within the Catholic moral tradition continues, and there is considerable interest in it by contemporary moral philosophers. But problems of justification and correct application remain. I argue that if the traditional Catholic conviction that there are exceptionless norms prohibiting inflicting some kinds of harms on people is correct, then double effect is justified and necessary. The objection that double effect is superfluous is a rejection (...) of that normative conviction, not a refutation of double effect itself. This justification suggests the correct way of applying double effect to controversial cases. But versions of double effect which dispense with the absolutism of the Catholic tradition lack justification and fall to the objection that double effect is an unnecessary complication. Keywords: double effect, intention, side effect CiteULike Connotea Del.icio.us What's this? (shrink)

Moral philosophers are fond of the dictum “ought implies can” and even deontologists normally admit the need to take account of consequences in the design of social institutions. Too often, however, philosophers fail to take advantage of the knowledge provided by the social sciences about the constraints and consequences of alternative forms of social organization. By discussing ideals in abstraction from the problems of institutionalization, they fail at least to see some of the important consequences and costs of a proposed (...) ideal, and sometimes they fail even to understand the ideal itself. (shrink)

Benardete paradoxes involve a beginningless set each member of which satisfies some predicate just in case no earlier member satisfies it. Such paradoxes have been wielded on behalf of arguments for the impossibility of an infinite past. These arguments often deploy patchwork principles in support of their key linking premise. Here I argue that patchwork principles fail to justify this key premise.

ABSTRACT The myth that there is no politics of science is dangerous as it prevents the important and urgently needed institution of some democratic control of the existing system of politics within the commonwealth of learning. Feyerabend's attack on science makes sense only when understood in this way.

This paper addresses the moral challenges presented by the existence of radical moral disagreement in contemporary health care. I argue that there is no neutral moral perspective for understanding and resolving these challenges, but that they must be formulated and resolved from within the various perspectives that generate the disagreement. I then explore the natural law tradition's approach to these issues as a test case for my thesis. Keywords: moral conflict, moral perplexity, natural law, radical moral disagreement, toleration CiteULike Connotea (...) Del.icio.us What's this? (shrink)

The history of ideas is an interdisciplinary field that began as an offshoot of the history of philosophy and was transformed by notions of perspective and cultural context drawn from the tradition of historical studies. The result is the practice of intellectual history, which has been carried out between the poles of inquiry commonly known as internalist and externalist, corresponding to mental phenomena and collective behavior in cultural surroundings. These are not opposed but rather complementary methods, and intellectual history may (...) be seen as the inside of cultural history and cultural history as the outside of intellectual history, the intellectual historian's task being to bring the two into alliance. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The Reconciliation of Myth: Benjamin’s Homage to BachofenJoseph MaliIn the “Tiergarten,” the first chapter of his autobiographical work, Berlin Childhood Around Nineteen-Hundred, Benjamin recalls how, as a child, he experienced the paths, monuments, and people of the park as a “labyrinth” replete with all kinds of mythological figures. Entering the park like a second Theseus following his Ariadne along the thread of erotic sensations, he discovered therein the myth-realm (...) of the ancient gods as transfigured in the bourgeois decorations of the Second Reich, most visibly so in the aristocratic monuments of Friedrich Wilhelm and Queen Louise: “They towered up from their round pedestals among the flower beds as if spellbound by magic curves that a watercourse had inscribed before them in the sand.” 1 As he invoked these primal visions thirty years later, Benjamin realized that they prefigured “the features of what is to come,” that is, he recognized in his early experiential impressions the topical concerns that were to determine his life and works. He then understood that he had been finding signs of “the return of the ancient gods” everywhere:Under their sign the Old West of Berlin was transformed into the West of antiquity, whence the western winds come to the mariners, who navigate their boat with the Hesperidan apples slowly upward the Landwehrkanal, in order to cast anchor near the Herkules Bridge. And yet again, as in my childhood, the Hydra and the Nemean lion found a place in the wild bushes around the big star. 2This chapter may serve as the key to Benjamin’s entire life and works: it reveals what Benjamin himself would have called his “origins.” Benjamin conceived [End Page 165] of origin (Usprung) in genealogical rather than in biological terms, contending that it was not to be found in the moment of intuition but rather in that of recognition. “The term origin is not intended to describe the process by which the existent came into being, but rather to describe that which emerges from the process of becoming and disappearance. Origin is an eddy in the stream of becoming, and in its current it swallows the material involved in the process of genesis.” 3 It occurs, Benjamin continues, when “an idea will constantly confront the historical world, until it is revealed fulfilled, in the totality of its history.” 4 And if, according to Benjamin (quoting Karl Kraus), “origin is the goal” of all philosophical and historical inquiries, then, in Benjamin’s own case, the “origin” must be found in that singular idea by which he had sought to illuminate his historical world. This was an idea which should be “revealed fulfilled, in the totality of its history” in his entire work. In order to find that idea we must concentrate, as it were, on the “eddies” of his life; that is, we must discern his particular current in the intellectual trends of the time and find out how and with what he emerged from it. What, then, were Benjamin’s “origins”? When and where did he recognize what his experiential impressions in the Tiergarten really meant?In his memorial biography, Walter Benjamin: The Story of a Friendship, Gershom Scholem recounts some of the most important of these moments. One of them occurred between 16 and 18 June 1916, while Scholem was visiting Benjamin’s house in Seeshaupt near Munich. Scholem recalls their last and most memorable conversation on that occasion:During a discussion of whether Hegel had wished to deduce the world, we turned to mathematics, philosophy, and myth. Benjamin accepted myth alone as “the world.” He said he was still not sure what the purpose of philosophy was, as there was no need to discover “the meaning of the world”: it was already present in myth. Myth was everything; all else, including mathematics and philosophy, was only an obscuration [Verdunkelung], a glimmer [Schein] that had arisen within it. 5Reflecting on these words, Scholem notes that “Benjamin’s decided turn to the philosophic penetration of myth, which occupied him for so many years, beginning with his study of Hölderlin and probably for the rest of his life, was manifested here for the first... (shrink)

In the religious controversies of the English Revolution (1640-60), one problem became particularly urgent. How far were the Scriptures to be accepted as a faithful record of history? Much ink was spilled over the theoretical and practical problems of evidence and testimony and there swiftly developed an increasing self-consciousness and sophistication about the meaning of "matter of fact." This paper describes the response to skeptics and dogmatists of such moderate divines as Henry Hammond, Seth Ward, Richard Baxter, and Brian Walton, (...) and the way in which they attempted to construct a defense of the Biblical story—incidentally helping to defend the claims of history in general. (shrink)

Further, we come here to what for the purpose of our present argument is the most important consideration of all, viz. that if we could show that there were two kinds of neural or physiological processess, occurring respectively on all occasions of pleasure and pain, the fact would be valueless for proving that life must be predominantly pleasant. It is perhaps intelligible that to succeed or fail in purposive activity should bring respectively contentment and discontent rather than vice-versa; but that (...) of two kinds of neural or physiological process, one should be accompanied by pleasure and the other by pain, is no more intelligible than if the connection were reversed. If the behaviour of any creature is affected by desires and aversions, by judgments, by feelings: if its desires and aversions or its judgments are connected with or affected by its pleasures and pains, then indeed the question with what bodily conditions its pleasures and pains are connected is part of the problem that interests the biologist—viz. what the conditions are under which the species can continue. But in that case the biologist must not claim that all the conditons of life and reproduction can be found in what happens in the body. Pleasures and pains, desires and aversions, purposes are not events that happen in the body. If they are the mere “apparence or sense” of what happens there, and alone determines survival or extinction, then what happens there to determine survival might, for all we can see, equally appear as pain or pleasure. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Erasmus and the Problem of the Johannine CommaJoseph M. LevineWhen Edward Gibbon decided to banish primary causes from the Decline and Fall and integrate secular and ecclesiastical history, he was completing a revolution that had begun unwittingly two centuries before. 1 To bring into his narrative of empire a consideration of the “Johannine comma” (the interpolation in 1 John 5:7–8) was not perhaps either digressive or inevitable; but it (...) would certainly have surprised and dismayed some of Gibbon’s immediate predecessors, such as the Catholic Frenchmen, Bossuet and Tillemont, each of whom had written about his subject and exercised an important effect on him at different times in his life; and it would have seemed even more incomprehensible to earlier generations. 2 Something had happened in the two centuries between Erasmus and Gibbon to make this new vantage point possible and congenial.It was, I think, nothing less than a victory for the idea of history. At the beginning of the sixteenth century theology still ruled as queen of the sciences and the claims of religion were largely justified by an appeal to reason and authority, that is, to Aristotelian logic and the dictates of the Church. By the end of the eighteenth century theology had become dependent on history, and religion was now justified by an appeal to “matter of fact.” 3 Even such mysteries as the doctrine of the Trinity, which had eluded the reason of St. Thomas and the schoolmen and had remained dependent on the dictates of Church Councils from Chalcedon to Trent, had come now to depend in some fashion on the [End Page 573] evidence of Scripture considered as history. At the same time the removal of final causes from the narrative of human events threatened to leave it—with every other Christian doctrine and event—to the arbitrament of ordinary scholarship. Gibbon brings us to the edge of religious modernity, and the history of the comma exactly spans the period of that development. It was Erasmus, however, as Gibbon himself suspected, who had first set some of the key problems, which he and his enlightened friends believed they had solved.For Erasmus the decision to edit the Greek New Testament was the result of an early commitment to Renaissance humanism and a response in particular to several lively currents in the contemporary intellectual scene. On the one hand Erasmus, encouraged perhaps by his new friend John Colet, began to think of the Bible principally as a record of history rather than as an arsenal of theological texts, above all as the story of Christ on earth—Christ as the supreme exemplar to be followed and imitated. Apparently, he had been well prepared for this by his acquaintance with the Brothers of the Common Life, and by a characteristic humanist distaste for logic and metaphysics—and a preference for rhetoric and history—which he displayed in all his early writing. 4 It seems to have been Colet’s Lectures on the New Testament that encouraged his view that Paul and the apostles, if not Christ himself, were best understood in their historical setting and that their message was primarily ethical. 5 In effect the churchman, Colet, and the wandering monk, Erasmus, wanted to place Christian responsibility back in the hands of the laity, in the conscience and behavior of the Christian believer, rather than in what they took to be the mechanical observances of Church ritual. This required that the Bible be placed at the very center of worship, in the hands of every man (and woman), accessible and intelligible as the Vulgate was not, and read in the first place for its story. There were others on the Continent who shared the same impulse—which, of course, the Protestant Reformation was also to endorse. 6Secondly, Erasmus was encouraged to his work by his accidental discovery of Lorenzo Valla’s Notes on the New Testament. 7 He had already pledged [End Page 574] himself to the culture of Italian humanism, to its determination to recover the Greek and Latin texts of classical antiquity and put them to use by imitation. Valla was the master of humanist technique, the greatest... (shrink)

The film Gandhi expands our understanding of how the virtue of care can function in the public sphere by portraying Gandhi dealing with Indian independence from Britain, the subjugation of women and Untouchables, and strife between Hindus and Muslims. Gandhi illustrates in his social and political activism how the virtue of care is animated by benevolence and structured by the building blocks of the care perspective: responsibility and need, relationship and mutual dependency, context and narrative.

Jules Michelet: Vico and the origins of nationalism -- James Joyce: Vico and the origins of modernism -- Erich Auerbach: Vico and the origins of historism -- Isaiah Berlin: Vico and the origins of pluralism.

We examine two competing solutions to Benardete paradoxes: causal finitism, according to which nothing can have infinitely many causes, and the unsatisfiable pair diagnosis (UPD), according to which such paradoxes are logically impossible and no metaphysical thesis need be adopted to avoid them. We argue that the UPD enjoys notable theoretical advantages over causal finitism. Causal finitists, however, have levelled two main objections to the UPD. First, they urge that the UPD requires positing a ‘mysterious force’ that prevents paradoxes from (...) arising. Since such a force is implausible, the UPD is in trouble. Second, they employ recombination or patchwork principles to argue that paradoxical situations would be possible if causal finitism were false. Since such situations are not possible, causal finitism is true, and so a substantive metaphysical thesis is needed to avoid the paradoxes. We argue that the UPD proponent can successfully respond to these objections. (shrink)

Bottlenecks introduces a powerful new way of understanding equal opportunity. Rather than literal equalization, Joseph Fishkin argues that Americans ought to aim to broaden the range of opportunities open to people, at every stage in life, to pursue different paths.

In this book Joseph Heath brings Jürgen Habermas's theory of communicative action into dialogue with the most sophisticated articulation of the instrumental conception of practical rationality-modern rational choice theory. Heath begins with an overview of Habermas's action theory and his critique of decision and game theory. He then offers an alternative to Habermas's use of speech act theory to explain social order and outlines a multidimensional theory of rational action that includes norm-governed action as a specific type.In the second (...) part of the book Heath discusses the more philosophical dimension of Habermas's conception of practical rationality. He criticizes Habermas's attempt to introduce a universalization principle governing moral discourse, as well as his criteria for distinguishing between moral and ethical problems. Heath offers an alternative account of the level of convergence exhibited by moral argumentation, drawing on game-theoretic models to specify the burden of proof that the theory of communicative action and discourse must assume. (shrink)

Growing concern has been expressed that we have entered a “post-truth” era in which each of us willfully believes whatever we choose, aided and abetted by alternative and social media that spin alternative realities for boutique consumption. A prime example of the belief in alternative realities is said to be acceptance of “conspiracy theories”—a term that is often used as a pejorative to indict claims of conspiracy that are so obviously absurd that only the unhinged could believe them. The epistemological (...) standard often involved in this indictment, however—the standard of “obvious” falsity—invites subjectivity in its application, because what is obviously false to one person can be common sense to another. This is not just a truism; considerable research suggests that people’s political beliefs, in general, and their acceptance or rejection of conspiracy theories in particular, tends in large part to be determined by partisan, ideological, and other priors. (shrink)

Longlisted for the PEN/E.O. Wilson Literary Science Writing Award A leading neuroscientist offers a history of the evolution of the brain from unicellular organisms to the complexity of animals and human beings today Renowned neuroscientist Joseph LeDoux digs into the natural history of life on earth to provide a new perspective on the similarities between us and our ancestors in deep time. This page-turning survey of the whole of terrestrial evolution sheds new light on how nervous systems evolved in (...) animals, how the brain developed, and what it means to be human. In The Deep History of Ourselves, LeDoux argues that the key to understanding human behavior lies in viewing evolution through the prism of the first living organisms. By tracking the chain of the evolutionary timeline he shows how even the earliest single-cell organisms had to solve the same problems we and our cells have to solve each day. Along the way, LeDoux explores our place in nature, how the evolution of nervous systems enhanced the ability of organisms to survive and thrive, and how the emergence of what we humans understand as consciousness made our greatest and most horrendous achievements as a species possible. (shrink)

Climate models calibrated exclusively with observations from the 19th through 21st centuries are unsuitable for assessing many important hypotheses about the future. Many systems in the modern climate are expected to cross dynamic thresholds in the near future, requiring more than the instrumental record for adequate calibration. In this paper I argue that paleoclimate analogues from earth’s past can mitigate this threshold problem, even if the modern climate exhibits features that make it historically unique. While this requires that paleoclimatologists be (...) increasingly discriminate in the past systems they target for modern analogues, the upshot is a practice of climate model construction that improves the reliability of future projections. All of this is achieved by integrating features of past climate systems discovered by the study of earth deep in the past. My analysis synthesizes important empirical work done by climate modelers and paleoclimatologists with relevant philosophical work on analogical reasoning in science. (shrink)

The overarching goal in the seventh edition of this text remains what it was for the first edition: "to provide a clear, concise, and reasonably comprehensive introductory survey of the ethical choices available to us in business." This book arose from the challenges encountered in my own teaching of business ethics. Over the years I have taught business ethics in many settings and with many formats. I sometimes relied on an anthology of readings, other times I emphasized case studies.

This essay is an investigation into the existence of a very unusual and some would say unacceptably exotic type of property: namely, the property of being a certain individual; or, if you prefer, the property of being identical to a certain individual. In other words, this essay will investigate whether in spite of their exotic nature there are thisnesses, and, in particular, whether thisnesses are instantiated by events. Of course, I have not really said enough yet about thisnesses to motivate (...) the criticism that such properties are exotic; for it might be the case that an individual x s thisness is merely a conjunction of all of x s qualitative properties. And, if we allow for the existence of all of the properties of an individual, it is not overly profligate to allow for the existence of this one additional conjunctive property. This, apparently, was Leibniz s view. Though seemingly ontologically mundane, however, such a qualitative1 thisness is not ontologically innocent. Given the definition of a thisness above, an individual s thisness is essential to it, and there are few philosophers who would wish to hold that all of an individual s properties are essential to it.2 Rather, it.. (shrink)

In this paper we argue that the difference between standard measurement and proxy measurement in paleoclimatology should not be understood in terms of ‘directness’. Measurements taken by climatologists to be paradigmatically non-proxy exhibit the kinds of indirectness that are thought to separate them proxy measurement. Rather, proxy measurements and standard measurements differ in how they account for confounding causal factors. Measurements are ‘proxy’ to the extent that the measurements require vicarious controls, while measurements are not proxy, but rather ‘standard’, to (...) the extent that the measurement apparatus provides sufficient physical control on its own. Guided by this account of proxy measurement, we then consider some of the challenges specific to historical proxy measurement and how it is that historical scientists address these challenges. Historical scientists rely on significant causal dependencies and naturally preserved signals to mitigate the influence of destructive processes over time. (shrink)

Joseph Grange's beautifully written book provides a unique synthesis of two major figures of world philosophy, John Dewey and Confucius, and points the way to a global philosophy based on American and Confucian values. Grange concentrates on the major themes of experience, felt intelligence, and culture to make the connections between these two giants of Western and Eastern thought. He explains why the Chinese called Dewey "A Second Confucius," and deepens our understanding of Confucius's concepts of the way (dao) (...) of human excellence (ren). The important dimensions of American and Chinese cultural philosophy are welded into an argument that calls for the liberation of what is finest in both traditions. The work gives a new appreciation of fundamental issues facing Chinese and American relations and brings the opportunities and dangers of globalization into focus. (shrink)

The Unraveling of Scientism, a companion to Joseph Margolis's Reinventing Pragmatism, follows the thread of American analytic philosophy through the second half ...

My goal in this paper is to address what I call the ‘Incoherence’ objection to the growing universe theory of time. At the root of the objection is the thought that one cannot wed objective temporal becoming with the existence of a tenseless past—which is apparently what the growing universe theorist tries to do. To do so, however, is to attribute both dynamic and static aspects to time, and, given the mutual exclusivity of these two aspects—so the thought goes—incoherence results. (...) My solution to the problem is to offer an alternative account of past existence that is compatible with a dynamic conception of time. I take as my starting point Adams’ suggestion that the past exists in virtue of the existence of thisnesses of past individuals. I first seek to defend this suggestion, before amending it in order to provide a satisfactory response to the Incoherence objection. The result is a new growing universe theory which avoids the Incoherence objection but which has some surprising features of its own. Chief among these is the rejection of present events. I argue, however, that such a rejection is a necessary consequence of endorsing the growing universe theory, and that it is not as counter-intuitive as it initially sounds. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 39.2 (2001) 259-288 [Access article in PDF] Substitutes for Wisdom:Kant's Practical Thought and the Tradition of the Temperaments Mark Larrimore [Appendix]For much of Western history, the theory of the four temperaments played a vital part in medicine, anthropology, and moral reflection. The Hippocratic foursome of sanguine, choleric, melancholy, and phlegmatic survives on the margins of modernity, but its role in moral theory and (...) practice has been largely forgotten. Premodern understandings of human diversity based in climate, temperament, and politics collapsed with the Galenic medical tradition with which they harmonized. Yet temperament continued to be a feature of moral philosophies and philosophical anthropologies even into the twentieth century, and arguably has had a symbiotic relationship with the egalitarian aspirations of modern moral and political thought. This essay surveys the development and practical consequences of the theory of the temperaments developed by one of the greatest prophets of modern values, Immanuel Kant.Temperament was a feature in Kant's course in anthropology from the 1760s until the end of his life. Kant's teachings on temperament are by turns creative and conservative, and bespeak a deep understanding of the logic and rationale of humoral characterology in ethics. But as Kant moves from an ethics based in feeling to an ethics based on the possibility of autonomy, his theory of temperament also changes. In 1764's Observations on the Feeling of the Beautiful and the Sublime, Kant eloquently celebrates the melancholy as the temperament capable of "genuine virtue" (Obs2:217-18/60); by the time of Anthropology from a Pragmatic Point of View (1798), he is commending instead "phlegma as strength" (a variant of a temperament he had earlier dismissed), which can serve as a "substitute for wisdom" (Ant7:290/155). 1 Both of these [End Page 259] positions are distinctive, especially for an eighteenth-century thinker. As we will see, however, they are not without precedent in the tradition of temperament theory. Whether Kant knew he was developing countertraditions of temperament or not, his arguments in each case creatively exploit tensions in the humoral system which go back to its origins in ancient Greece.The mature Kant defended the classic foursome at a time when it had come under fire from many quarters. The early nineteenth century historian of temperament theories Harro Wilhelm Dircksen thought Kant played a decisive role in saving the classical theory from oblivion. 2 Why did Kant think it worth retrieving? One would expect him to reject a category which eighteenth-century German Popularphilosophie understood as a proto-psychological category bridging the gap between body and mind, nature and freedom. Yet, as I shall argue, the very things which might seem to render a theory of temperament incompatible with his mature ethics of autonomy make it important to [End Page 260] Kant. An understanding of human embodiment and diversity like that of the tradition of the temperaments forms part of the background to Kant's practical thought, and ethical formalism makes more rather than less sense if difference is taken seriously. For the same reason, it is important to have the right account of diversity. The complicated view of temperament in the Anthropology furnishes a microcosm of Kant's understanding of the fraught role of empirical considerations in recognizing and promoting freedom in rational agents embodied in human form(s).In this essay I will (1) provide a brief survey of the tradition of temperament theorizing before Kant, and expound Kant's (2) early and (3) mature views of temperament in the context of this tradition, as well as in the context of his emerging practical philosophy. 3 Some well-known parts of Kant's ethics make a new kind of sense when read in the light of the fact that their author thought humanity subdivided into temperaments. 1. The Tradition of the Temperaments 1.1. The history of moralizing about and through the temperaments is complex and—once one moves beyond the melancholy—largely uncharted. Here I will... (shrink)

This paper addresses three factors that have contributed to shifts in decision making in health care. First, the notion of patient autonomy, which has changed due to the rise of patient-centred approaches in contemporary health care and the re-conceptualization of the physician-patient relationship. Second, the understanding of patient autonomy has broadened to better engage patient participation. Third, the need to develop cross-cultural health care ethics. Our paper shows that the shift in the West from the individual to the relational self (...) indicates an important change in the understanding of autonomy through the lens of culture. Practices that recognize the notion of the relational self allow for a more balanced view of autonomy and a richer conception of moral agency. (shrink)

[Peter Simons] Commonsense ontology contains both continuants and occurrents, but are continuants necessary? I argue that they are neither occurrents nor easily replaceable by them. The worst problem for continuants is the question in virtue of what a given continuant exists at a given time. For such truthmakers we must have recourse to occurrents, those vital to the continuant at that time. Continuants are, like abstract objects, invariants under equivalences over occurrents. But they are not abstract, and their being invariants (...) enables us to infer both their lack of temporal parts and that non-invariant predications about them must be relativized to times. \\\ [Joseph Melia] In this paper I try to eliminate occurrents from our ontology. I argue against Simons' position that occurrents are needed to supply truthmakers for existential claims about continuants. Nevertheless, those who would eliminate occurrents still need some account of our willingness to assert sentences that logically entail their existence. Though it turns out to be impossible to paraphrase away our reference to occurrents, I show that the truthmakers for such sentences are facts that involve only continuants. This is enough to allow us to regard our ordinary talk about occurrents as fictional. Finally, I argue that a proper conception of the underlying temporal facts about continuants can both avoid the problematic tensed theory of time and the problem of temporary intrinsics. (shrink)

A great deal of research has demonstrated that learning is influenced by the learner’s prior background knowledge (e.g. Murphy, 2002; Keil, 1990), but little is known about the processes by which prior knowledge is deployed. We explore the role of explanation in deploying prior knowledge by examining the joint effects of eliciting explanations and providing prior knowledge in a task where each should aid learning. Three hypotheses are considered: that explanation and prior knowledge have independent and additive effects on learning, (...) that their joint effects on learning are subadditive, and that their effects are superadditive. A category learning experiment finds evidence for a superadditive effect: explaining drives the discovery of regularities, while prior knowledge constrains which regularities learners discover. This is consistent with an account of explanation’s effects on learning proposed in Williams & Lombrozo (in press). (shrink)