Unlike Buridan’s ass, most of us have the capacity to deal with situations in which there is more than one maximally preferable option. According to supporters of a prominent conception of intention, making a decision in this type of case involves coming to prefer, or judge preferable, one of the relevant options over the other. The purpose of this paper is to argue that accounts that reduce intentions to preferences or preferability judgments cannot explain how it is possible to rationally (...) form and to reason from such intentions in Buridan cases. Such accounts commit us to rejecting long-standing philosophical commitments to the relation between: judgment and evidence; reconsideration and new information; preference and judgments of preferability; and (in some versions) commit us to attributing overly complex forms of motivation. (shrink)

Buridan’s Ass faced a choice between two identical bales of hay; governed only by reason, the donkey starved, unable to choose. It seems clear that we face many such cases, and resolve them successfully. Our success seems to tell against any view on which action and intention require evaluative preference. I argue that these views can account for intention and intentional action in cases like that of Buridan’s Ass. A decision to act nonintentionally allows us to resolve these cases without (...) their being a damaging theoretical counterexample. (shrink)

The dilemma confronted by Buridan’s Ass leads into a problem about nil-preference situations, to which there is a solution in the literature that is inspired by Alan Turing: we have evolved with a computational module in our brains that comes into play in such situations by picking a random action among the alternatives that detennines the subject’s choice. We relate these Buridan’s Ass situations to a larger, theoretically interesting category in which there is no alternative that is decisively superior to (...) others with respect to expected utility, and we try to show how our emotional makeup figures in a rational response, particularly as informed by symbolic utilitythat we draw down from our culture’s shared understandings. The category is theoretically interesting because it contains moral dilemmas, as well as hard cases in which an imponant choice must be made without an option that has clearly superior expected utility. We argue that our Emotional Response Model is preferable to Turing’s Randomizer for this category, as well as more illuminating about nil-preference situations or close approximations thereto. (shrink)

This paper discusses Buridan’s Ass as a thought experiment that has been misunderstood. First, the thought experiment is presented in its traditional form and typical objections to it are discussed. Then the author argues that William of Ockham supplies the background necessary for a more meaningful formulation. Buridan’s Ass is designed to show that each individual must choose how to value the value we discover in the world and that, in so doing, we create individual preferences.

The moral of Buridan's Ass is that it can sometimes be rational to perform one action rather than another even though one lacks stronger reason to do so. Yet it is also commonly believed that it cannot ever be rational to believe one proposition rather than another if one lacks stronger reason to do so. This asymmetry has been taken to indicate a deep difference between epistemic and practical rationality. According to the view articulated here, the asymmetry should instead (...) be explained by the difference between rational intentions and rational actions. Thus, it turns out, Buridan's Ass-style cases do not indicate an asymmetry between epistemic and practical rationality as such. (shrink)

The paradox of ’Buridan’s ass’ involves an animal facing two equally adequate and attractive alternatives, such as would happen were a hungry ass to confront two bales of hay that are equal in all respects relevant to the ass’s hunger. Of course, the ass will eat from one rather than the other, because the alternative is to starve. But why does this eating happen? What reason is operative, and what explanation can be given as to why the ass eats from, (...) say, the left bale rather than the right bale? Why doesn’t the ass remain caught between the options, forever indecisive and starving to death? Religious pluralists face a similar dilemma, a dilemma that I will argue is more difficult to address than the paradox just described. (shrink)

In this regular series, Michael Clark, editor of Analysis, presents some of the most intriguing philosophical paradoxes. Here we examine the paradox of Buridan's ass.

The mythical1 hungry ass, facing two identical bundles of hay equidistant from him, has engendered two related questions. Can he choose one of the bundles, there seemingly being nothing to incline him one way or the other? If he can, the second puzzle — pertaining to rational choice — arises. It seems the ass cannot rationally choose one of the bundles, because there is no sufficient reason for any choice.2In what follows, I will argue that choice is possible even when (...) there is no option which is better than the others (section II), and that it is perfectly reasonable to choose an option even when there is no sufficient reason for it (section III). I will then (section IV) point to another puzzling feature of the .. (shrink)

Buridan’s principle asserts that a discrete decision based upon input having a continuous range of values cannot be made within a bounded length of time. It appears to be a fundamental law of nature. Engineers aware of it can design devices so they have an infinitessimal probability of not making a decision quickly enough. Ignorance of the principle could have serious consequences.

The problem known as Buridan’s Ass says that a hungry donkey equipoised between two identical bales of hay will starve to death. Indecision kills the ass. Some philosophers worry about human analogs. Computer scientists since the 1960s have known about the computer versions of such cases. From what Leslie Lamport calls ‘Buridan’s Principle’—a discrete decision based on a continuous range of input-values cannot be made in a bounded time—it follows that the possibilities for human analogs of Buridan’s Ass are far (...) more wide-ranging and securely provable than has been acknowledged in philosophy. We are never necessarily decisive. This is mathematically provable. I explore four consequences: first, increased interest of the literature’s solutions to Buridan’s Ass; second, a new asymmetry between responsibility for omissions and responsibility for actions; third, clarification of the standard account of akrasia; and, fourth, clarification of the role of credences in normative decision-theory. (shrink)

This publication offers the first critical edition of John Buridan’s second set of questions on Aristotle's “De generatione et corruptione”. The edition was made by Michiel Streijger, Paul Bakker and Hans Thijssen. First published as a printed book in 2010, the publication has been converted to open access with the CC BY-NC-ND license as of September 2023.

Buridan was a brilliant logician in an age of brilliant logicians, sensitive to formal and philosophical considerations. There is a need for critical editions and accurate translations of his works, for his philosophical voice speaks directly across the ages to problems of concern to analytic philosophers today. But his idiom is unfamiliar, so editions and trans lations alone will not bridge the gap of centuries. I have tried to make Buridan accessible to philosophers and logicians today by the introduc tory (...) essay, in which I survey Buridan's philosophy of logic. Several problems which Buridan touches on only marginally in the works trans lated herein are developed and discussed, citing other works of Buridan; some topics which he treats at length in the translated works, such as the semantic theory of oblique terms, I have touched on lightly or not at all. Such distortions are inevitable, and I hope that the idiosyncracies of my choice of philosophically relevant topics will not blind the reader to other topics of value Buridan considers. My goal in translating has been to produce an accurate renaering of the Latin. Often Buridan will couch a logical rule in terms of the grammatical form of a sentence, and I have endeavored to keep the translation consistent. Some strained phrases result, such as "A man I know" having a different logic from "I know a man. " This awkwardness cannot always be avoided, and I beg the reader's indulgence. All of the translations here are my own. (shrink)

This entirely new English translation of Buridan's classic treatment of logical consequence aims to make accessible to the modern reader the foremost treatment of the subject in the middle ages. The translation is accompanied by an introduction in which Buridan's ideas are set in their historical context and clearly explained.

This volume is the first annotated translation in any language of the entire text of the Summulae de dialectica, by the Parisian master of arts John Buridan (1300-1358). One of the most influential works in the history of late medieval philosophy, the Summulae is Buridan's systematic exposition of his nominalist philosophy of logic. Buridan's doctrine spread rapidly and for some two hundred years was dominant at many European universities. His work is of increasing interest today not only to (...) historians of medieval philosophy but also to modern philosophers, several of whom find in Buridan's ideas important clues to problems of contemporary philosophy. Gyula Klima provides a substantial introduction to Buridan's life and work and discusses his place in the history of logic. Through extensive notes Klima assists philosopher and medievalist alike to read Buridan with understanding and insight. Those with a philosophical interest in the relations among the structures of language, thought, and reality will find much to ponder in the Summulae. (shrink)

John Buridan (d. ca. 1360) was one of the most talented and influential philosophers of the later Middle Ages. His Questions Commentary on the eight books of Aristotle's Physics is the most important witness to Buridan's teachings in the field of natural philosophy. This volume presents the first critical edition of books III and IV of the final redaction of Buridan's Questions Commentary on the Physics. The critical edition of the Latin text is accompanied by a detailed guide (...) to the contents of Buridan's questions by Edith D. Sylla. (shrink)

This edition of that chapter is intended to make Buridan's ideas and arguments accessible to a wider range of readers.

John Buridan was a fourteenth-century philosopher who enjoyed an enormous reputation for about two hundred years, was then totally neglected, and is now being 'rediscovered' through his relevance to contemporary work in philosophical logic. The final chapter of Buridan's Sophismata deals with problems about self-reference, and in particular with the semantic paradoxes. He offers his own distinctive solution to the well-known 'Liar Paradox' and introduces a number of other paradoxes that will be unfamiliar to most logicians. Buridan also moves (...) on from these problems to more general questions about the nature of propositions, the criteria of their truth and falsity and the concepts of validity and knowledge. This edition of that chapter is intended to make Buridan's ideas and arguments accessible to a wider range of readers. The volume should interest many philosophers, linguists and logicians, who are increasingly finding in medieval work striking anticipations of their own concerns. (shrink)

This critical edition is the first edition of John Buridan's commentary on Aristotle's Topics. The work is preserved in one complete manuscript of good quality and in four abbreviated versions. Buridan composed the work at the University of Paris in the first half of the fourteenth century, and the work illustrates very well how the commentators of this period took a freer attitude to Aristotle than previously and were selective about the passages which they commented upon. In book II (...) Buridan discussed a number of sophisms which are not found in his collection of sophisms. The commentary was quite influential in the fifteenth century, particularly on the teaching in the universities of Central and Eastern Europe. (shrink)

'De syllogismis' is the fifth treatise of John Buridan's 'Summulae dialecticae', a textbook he wrote for his logic course in the Faculty of Arts at the University of Paris. 'De syllogismis' contains material related to Aristotle's Analytica Priora and Boethius's 'De hypotheticis syllogismis'. The textbook discusses inferences involving not only propositions de inesse, but also propositions featuring oblique, reduplicative and infinite terms. Buridan displays a keen interest in modal inferences and inferences involving propositional attitudes. Buridan's De syllogismis continues (...) along the lines of his nominalist conception of the relations between mind, language and reality. (shrink)

Research documents that many chronic non-malignant pain patients experience existential, spiritual and religious needs; however, research knowledge is missing on if and how physicians approach these needs. We conducted a systematic review to explore the extent to which physicians address these needs in their communication with chronic non-malignant pain patients and to explore the facilitators and challenges of this communication. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, searching Embase, Medline, Scopus and PsycINFO. The quality of (...) the included articles was assessed based on design-specific screening tools. We included four of 2337 screened articles and found the quality to be good. Physicians’ communication about existential, spiritual and religious needs was given low priority and depended on the patients’ own initiative, except when clinicians were interested in holistic care. Patient dissatisfaction with the physician’s attention to these needs was related to higher pain and depression. Physicians’ challenges for addressing these needs were their tendency to prioritize physiological aspects and close further elaboration of existential needs when addressed by the patients. The main facilitator was the individual physician’s willingness to listen with openness and empathy to the patients’ existential concerns. A tentative conclusion is that physicians rarely meet the existential, spiritual and religious needs of their chronic non-malignant pain patients. This might be due to higher priority of physical aspects, lack of time and a lack of knowledge about the importance of and training in the ability to address these needs. Further research is needed on physicians’ communication about existential, spiritual and religious needs and on their training in here. (shrink)

A question that has been largely overlooked by philosophers of religion is how God would be able to effect a rational choice between two worlds of unsurpassable goodness. To answer this question, I draw a parallel with the paradigm cases of indifferent choice, including Buridan's ass, and argue that such cases can be satisfactorily resolved provided that the protagonists employ what Otto Neurath calls an ‘auxiliary motive’. I supply rational grounds for the employment of such a motive, and then (...) argue against the views of Leibniz and Nicholas Rescher to show that this solution would also work for God. (shrink)

Deliberation is often seen as the site of human freedom, but the binding power of rationality seems to imply that deliberation is, in its own way, a deterministic process. If one knows the starting preferences and circumstances of an agent, then, assuming that the agent is rational and that those preferences and circumstances don’t change, one should be in a position to predict what the agent will decide. However, given that an agent could conceivably confront equally attractive alternatives, it is (...) an open question whether rational choice theory can ever eliminate indeterminacy. The clearest support for such a limitation comes from the “Buridan’s ass” scenario, where an agent is confronted with two (or more) equally attractive/unattractive options. Does rationality by itself have the resources needed to prevent such paralysis of action? Those who cannot accept the idea of decisional impotence devise various ways to avoid it: postulating a neutral valence, tipping the utilities, positing sub-personal influences, and bunching the options. I argue that each of these responses is either unwarranted or flawed. All parties to the debate agree that, factually, paralysis of action is not a pervasive phenomenon. This is either because (i) the utilities one assigns to two or more options can never be balanced or because (ii) thanks to some non-rational faculty (say, the will), we would not be stuck even if those utilities were perfectly counterpoised. By looking critically at four untenable responses, I aim to show that (i) is often just a dogma and (ii) is by no means a silly position. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 42.2 (2004) 219-220 [Access article in PDF] Jack Zupko. John Buridan: Portrait of a Fourteenth-Century Arts Master. Notre Dame: University of Notre Dame Press, 2003. Pp. xix + 446. Cloth, $70.00. Paper, $40.00. What does the name "John Buridan" call to mind? For many, including medievalists, not much at all—at best, perhaps, a set of apparently unrelated ideas: nominalism; an impetus theory of (...) projectile motion; and a peculiar account of the will (although "Buridan's ass," the indecisive donkey caught between two equally appetizing bales of hay, is not found in Buridan's writing). In correcting this ignorance—an injustice to arguably the most famous and influential philosopher of the early-to-mid-fourteenth century—the temptation might have been to articulate Buridan's "positions" on "the big questions," allowing readers to fit Buridan into received categories. Thankfully, the present work, the first book-length study of Buridan in any language, resists this temptation. The John Buridan that emerges from Jack Zupko's skillful "exercise in philosophical portraiture" doesn't serve to simply fill gaps in our awareness of the historical record, but to enlighten and challenge our understanding of the practice of philosophy and the study of its history.Zupko emphasizes throughout that Buridan was a teacher, a master of arts in Paris. Buridan's pedagogical concerns help make sense of his central work in logic. As the basis for his arts lectures, Buridan chose Peter of Spain's Summulae Logicales, but in commenting on Peter, Buridan moves beyond creative exegisis to comprehensive renovation. Buridan (c. 1300-c. 1361) naturally wanted to accommodate terminist or via moderna supposition theory; but more importantly, he wanted a logic text that would set out a general plan of philosophical inquiry, "a compendium of methods, a 'how-to' book for the philosopher" (135). Buridan thus designed his own Summulae de Dialectica as a new authoritative logic text, and Zupko persuasively argues that its "nominalism" should be understood as less a set of doctrines in theoretical logic, than a program of logical practice, an education in logic as the ars artium, the universal intellectual tool.Zupko's portrait of "Buridan's vision of the philosophical enterprise" is thus appropriately divided into two parts. The first summarizes Buridan's method as described in the individual treatises of his Summulae. The second displays the method in practice, rehearsing and evaluating some of Buridan's arguments on various subjects. Many scholars will gravitate first to the latter part, where Zupko offers important interpretations and clarifications of Buridan's views. In these chapters, Zupko helps us to appreciate, among other things: how the problem of universals served to help Buridan define the scope of philosophy (ch. 10); the philosophical modesty of Buridan's account of the intellectual soul's presence in the body (ch. 11); the relationship between Buridan's epistemology and the skepticism of his Parisian contemporary Nicholas of Autrecourt (ch. 12); the sense in which Buridan is an "empiricist," viz an epistemic naturalist and reliabilist (ch. 13); how Buridan regarded moral psychology as applied physics, treating virtue as a kind of impetus (ch. 14); how Buridan's account of freedom can be regarded as a "perfection" of Thomistic intellectualism (ch. 15).Throughout these discussions, Zupko always keeps in sight his larger purpose of illustrating Buridan's conception of philosophical inquiry. Zupko makes much of the fact that [End Page 219] Buridan never wrote as a theologian, remaining his entire career in the arts faculty, where he wanted logic to organize secular inquiry. As Zupko notes, in this way Buridan's scholastic project seems to prefigure the "modern." But Buridan seems modern in another way as well. As Zupko points out in his "Introduction," though a cleric, Buridan never joined a religious order, so that his ideas developed independently of the Franciscan and Dominican traditions. He was, then, a teacher without a tradition—at least without deliberate allegiance to tradition, although he was in many ways the product of traditional scholastic intellectual discipline.Perhaps this... (shrink)

Adorno’s ‘addendum’ names the experience by which socially constrained agents are jolted into resistance against their suffering. The impulse to action is simultaneously intra-mental and somatic, and thus forms the locus of a jointly conscious and bodily impetus to confronting the ideological and material forces that produce contemporary unfreedom. In this way the ‘addendum’ is a historically developing, indeterminate, yet inexhaustible glimmer of hope for both agents and theorists who make social suffering central to their critical analysis. This article explores (...) the structure of the addendum by unpacking its presentation first in Negative Dialectics and then by way of the one-sided and cautionary illustrations of Buridan’s ass and Hamlet in the History and Freedom lectures. While aesthetic, ideal, affect-centered and Freudian interpretations of the addendum have been developed, appreciating the somatic or bodily, the intra-mental or conscious, and the historicized accounts of nature and reason that Adorno weaves together to explain ever-present possibilities of resistance requires instead a non-reductive materialist and dialectical lens. (shrink)

This book provides the first general account of the works of the Latin writer Apuleius, most famous for his great novel the `Metamorphoses' or `Golden Ass'. Living in second-century North Africa, Apuleius was more than an author; he was an orator and professional intellectual, Platonist philosopher, extraordinary stylist, relentless self-promoter, as well as a versatile author of a remarkably diverse body of other work, much of which is lost to us.

ARISTOTLE IS UNIVERSALLY credited with inventing the concept of teleology: "nature is among the causes which act for the sake of something." "That for the sake of which" is a thing's purpose, its end, the goal at which it aims. Taking Aristotle's physics as a focal point for his philosophy of nature, I shall argue that teleology functions within his theory of nature not only substantively, but also procedurally. First, then, I shall explain what I mean by teleology as procedure (...) and then show how this procedure relates both to problems within physics and to Aristotle's conception of physics as a science. (shrink)

These rhetorical texts by Apuleius, second-century Latin writer and author of the famous novel Metamorphoses or Golden Ass, have not been translated into English since 1909. They are some of the very few Latin speeches surviving from their century, and constitute important evidence for Latin and Roman North African social and intellectual culture in the second century AD, a period where there is increasing interest amongst classicists and ancient historians. They are the work of a talented writer who is being (...) increasingly viewed as the major literary artist of his time in Latin. (shrink)

An extensive literature overlapping economics, statistical decision theory and finance, contrasts expected utility [EU] with the more recent framework of mean–variance (MV). A basic proposition is that MV follows from EU under the assumption of quadratic utility. A less recognized proposition, first raised by Markowitz, is that MV is fully justified under EU, if and only if utility is quadratic. The existing proof of this proposition relies on an assumption from EU, described here as “Buridan’s axiom” after the French philosopher’s (...) fable of the ass that starved out of indifference between two bales of hay. To satisfy this axiom, MV must represent not only “pure” strategies, but also their probability mixtures, as points in the (σ, μ) plane. Markowitz and others have argued that probability mixtures are represented sufficiently by (σ, μ) only under quadratic utility, and hence that MV, interpreted as a mathematical re-expression of EU, implies quadratic utility. We prove a stronger form of this theorem, not involving or contradicting Buridan’s axiom, nor any more fundamental axiom of utility theory. (shrink)

Given the great amount of research in medieval logic and grammar that has gone on in the last quarter of the century, the general portraits of medieval developments in these fields found in works like Ph. Boehner’s Medieval Logic or histories of logic by Prantl, Bochenski, or the Kneales are quite out of date. This little work by Jan Pinborg, the Director of the Medieval Institute in Copenhagen, which has specialized in medieval grammar and logic, is a good update of (...) the general contributions made to these fields from the twelfth to the fifteenth centuries. Based on lectures given at Copenhagen and at the Christian Albrects University at Kiel, this short book indicates the interplay of the two disciplines at various historical periods of this era and highlights the contributions of Anselm, Abelard, Peter of Spain, Boethius of Dacia, Ockham, Buridan, and Burleigh. (shrink)

The history of the physics of pendular motion rightly begins with Galileo's discovery of the isochronous character of that motion. There is, however, a ‘pre-history’ of the pendulum, centering on its initial recognition as a significant special case requiring explanation. This occurred in the writings of Jean Buridan and Nicole Oresme in the middle of the fourteenth century. Earlier works that might have been construed as discussing pendular motion are considered, as are the explanations for the scholastic ‘discovery’ of pendular (...) motion put forth by Thomas Kuhn and Piero Ariotti. In contrast to these writers, this paper seeks to account for the pendulum's emergence with reference to an imaginary experiment concerning a body moving past the earth's center, medieval theories of impetus, and the proximate physical model of pendular motion, the late medieval heavy suspended church bell. (shrink)