This paper reports on the investigation of the effects of neuronal shape, at both individual cell and network level, on the behavior of neuronal systems. More specifically, two-dimensional biologically realistic neuronal networks are obtained that take explicity into account the position and morphology of neuronal cells, with the respective behavior for associative recall being simulated through a diluted version of Hopfield's model. While a specific probability density function is used for the placement of the cell bodies, images of real neuronal (...) cells (namely alpha and beta ganglion cells from the cat retina) are used to obtain biologically realistic models. Several morphological measures – including fractal dimension, the excluded volume, and integral geometry functionals–are estimated for the considered cells, and their values are correlated with the potential of the network for associative recall, which is quantified in terms of the overlap between distorted version of the trained patterns and their original version. Such an approach allows the quantitative and objective characterization of the relationship between neuronal shape and function, an important issue in neuroscience. The obtained results substantiate interesting relationships between the neural morphology and function as determined by the performance of the network. (shrink)

The world is increasingly developing towards complex and chaotic behaviour. Enterprises are challenged to establish flexible but trustworthy structures of doing business within global instability. We need to educate our students today for coping with such chaotic patterns in their professional future. As an example, the student-run Europe-wide organisation ESTIEM is offering the 2-week Summer Academy (SAC) to develop the communication skills corresponding. It also means among other aims to strengthen mutual trust through interaction of the students. In 2011, one (...) of the SAC took place in Serbia. About 15 students attended it from all over Europe. In the paper, three of these students report on their experiences as a set of suggestions of how to develop further engineering and economics teaching towards international trust and stability. (shrink)

We investigated the impact of frequency of interruptions in a simulated medical visual search task. Participants performed the visual search task during which they were interrupted by a number-classification task in 25, 50, or 75% of all trials, respectively, reflecting the frequency conditions. Target presence and interruption were varied within-subjects, and interruption frequency was varied between-subjects. Globally, on a frequency condition level, participants in the low frequency condition had longer mean response times for the primary visual search task than in (...) the high condition, but there were no other performance differences between the three frequency conditions. Locally, on the level of specific interruption effects, accuracy decreased directly after interruptions for target present but not for target absent trials. Furthermore, interruptions caused significant interruption costs, reflected in slower overall RTs in interrupted than in uninterrupted trials. The combined findings show that especially for critical visual search tasks as in the medical field, interruptions—regardless of frequency—should be avoided. (shrink)

Ethical loneliness is the experience of being abandoned by humanity, compounded by the cruelty of wrongs not being heard. It is the result of multiple lapses on the part of human beings and political institutions that, in failing to listen well to survivors, deny them redress by negating their testimony and thwarting their claims for justice. Jill Stauffer examines the root causes of ethical loneliness and how those in power revise history to serve their own ends rather than the (...) needs of the abandoned. Out of this discussion, difficult truths about the desire and potential for political forgiveness, transitional justice, and political reconciliation emerge. Moving beyond a singular focus on truth commissions and legal trials, she considers more closely what is lost in the wake of oppression and violence, how selves and worlds are built and demolished, and who is responsible for re-creating lives after they are destroyed. Stauffer boldly argues that rebuilding worlds and just institutions after violence is a broad obligation and that those who care about justice must first confront their own assumptions about autonomy, liberty, and responsibility before an effective response to violence can take place. In building her claims, Stauffer draws on the work of Emmanuel Levinas, Jean Améry, Eve Sedgwick, and Friedrich Nietzsche, as well as concrete cases of justice and injustice across the world. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Toward Mindful Music Education:A Response To Bennett ReimerSandra L. StaufferIn her book Composing a Life, Mary Catherine Bateson reminds us to acknowledge our antecedents—those who have gone before in whatever way or whatever path.1 I believe we should also acknowledge our co-conspirators—those who have listened to us and wrestled with our ideas. Following Bateson, I wish to recognize the contributions of my teachers and my colleagues, particularly the members (...) of the doctoral seminar at Arizona State University. I am grateful for your contributions to the life of my mind and the words of this morning. For the record, I also want to say that Bennett Reimer is both antecedent and co-conspirator for everyone in this room, and we are indebted to him."The first task of philosophy involves learning to ask a good question," says Walter Feinberg in his essay on the philosophical scholar.2 Reimer asks us, "Who is philosophy of music education for?"—a provocative question indeed. He also gives us an answer: K-12 students.I agree, but not really. How can that be? Imagine this. A music teacher I know, Stephanie, was engaged with some first-grade children in singing songs and moving and reading rhythms. She turned to write on the white board. When she turned back to the children, one boy, Alex, was standing, perfectly still, on his head. What happened next? I will tell you in few minutes. Reimer says, "Philosophical issues are not disconnected to or incidental to musical experience. [End Page 135] They are foundational for musical experience, because one's values, beliefs, desires, preferences, and so forth, directly affect how one engages with music and what one gets from doing it." Abridging those two sentences at my own peril, Reimer appears to be saying that philosophical issues are foundational to musical experience.That idea works for me only if I am standing, figuratively and metaphorically, not literally, on my head. It seems to me that experience is the foundation of philosophy or, put another way, that one's philosophy derives from one's experiences; the richer the experiences, the richer the philosophy. A philosophy based on limited or weak experience is a limited or weak philosophy. This, however, is only surface-level logic for a deeper epistemological question—where does one's philosophy come from? If I take the Deweyan perspective that philosophy derives from experience, then surely I am obligated, in this forum, to define my terms—particularly "experience." It would be easy to say that experience means making music and listening to music, and surely it does. By experience, however, I mean not only these actions—the doing of music—but also thinking, or what Ellen Langer calls mindfulness.3 Langer describes mindful learning as having three characteristics: "the continuous creation of new categories; openness to new information; and an implicit awareness of more than one perspective."4 I like how Robert Duke articulates the same idea: "Teach things that are intellectually interesting and functionally valuable."5 Engage students not just in doing, but also in thinking—in mindful learning. Rich experience makes for rich philosophy. If we are talking about music education at all levels that is not only participatory, but also mindful, then I am all for it.Reimer asks a second question: how are we to accomplish the teaching of philosophy to K-12 students? I want to know what we are trying to accomplish. Are we trying to teach the content of philosophy or are we trying to help students develop their own abilities to think about their experiences as musicians, whether as listeners or as music makers, in whatever contexts they find themselves? The former seems to be a reification of philosophy in which I am not eager to engage most K-12 students. I hope we are aiming for the latter. If so, then our task is to provide rich and mindful experiences in every music setting. Our task is to model the disposition of a philosopher—one who asks questions, is curious, and is engaged in the life of the mind.This seems so obvious. Why aren't we doing it already? There... (shrink)

The Christian does not live in a vacuum, says the author, but in a world of government, politics, labor, and marriage. Hence, Christian ethics cannot exist in a vacuum what the Christian needs, claims Dietrich Bonhoeffer, is concrete instruction in a concrete situation. Although the author died before completing his work, this book is recognized as a major contribution to Christian ethics. The root and ground of Christian ethics, the author says, is the reality of God as revealed in (...) Jesus Christ. This reality is not manifest in the Church as distinct from the secular world such a juxtaposition of two separate spheres, Bonhoeffer insists, is a denial of God's having reconciled the whole world to himself in Christ. On the contrary, God's commandment is to be found and known in the Church, the family, labor, and government. His commandment permits man to live as man before God, in a world God made, with responsibility for the institutions of that world. (shrink)

Called by Karl Barth the brilliant Ethics of Dietrich Bonhoeffer, this book is finally being recognized as Bonhoeffers magnum opus and one of the most important works of Christian ethics of the last century.

Stauffer demonstrates the complex unity of Plato's Gorgias through a careful analysis of the dialogue's three main sections. This includes Socrates' famous argumentative duel with Callicles, a passionate critic of justice and philosophy, showing how the seemingly disparate themes of rhetoric, justice and the philosophic life are woven together into a coherent whole. His interpretation of the Gorgias sheds new light on Plato's thought, showing that Plato and Socrates had a more favourable view of rhetoric than is usually supposed. (...) Stauffer also challenges common assumptions concerning the character and purpose of some of Socrates' most famous claims about justice. Written as a close study of the Gorgias, Stauffer also treats broad questions concerning Plato's moral and political psychology and uncovers the view of the relationship between philosophy and politics that guided Plato as he wrote his dialogues. (shrink)

Behaviourism is the view that preferences, beliefs, and other mental states in social-scientific theories are nothing but constructs re-describing people's behaviour. Mentalism is the view that they capture real phenomena, on a par with the unobservables in science, such as electrons and electromagnetic fields. While behaviourism has gone out of fashion in psychology, it remains influential in economics, especially in ‘revealed preference’ theory. We defend mentalism in economics, construed as a positive science, and show that it fits best scientific practice. (...) We distinguish mentalism from, and reject, the radical neuroeconomic view that behaviour should be explained in terms of brain processes, as distinct from mental states. (shrink)

The contemporary theory of epistemic democracy often draws on the Condorcet Jury Theorem to formally justify the ‘wisdom of crowds’. But this theorem is inapplicable in its current form, since one of its premises – voter independence – is notoriously violated. This premise carries responsibility for the theorem's misleading conclusion that ‘large crowds are infallible’. We prove a more useful jury theorem: under defensible premises, ‘large crowds are fallible but better than small groups’. This theorem rehabilitates the importance of deliberation (...) and education, which appear inessential in the classical jury framework. Our theorem is related to Ladha's (1993) seminal jury theorem for interchangeable (‘indistinguishable’) voters based on de Finetti's Theorem. We also prove a more general and simpler such jury theorem. (shrink)

Which rules for aggregating judgments on logically connected propositions are manipulable and which not? In this paper, we introduce a preference-free concept of non-manipulability and contrast it with a preference-theoretic concept of strategy-proofness. We characterize all non-manipulable and all strategy-proof judgment aggregation rules and prove an impossibility theorem similar to the Gibbard--Satterthwaite theorem. We also discuss weaker forms of non-manipulability and strategy-proofness. Comparing two frequently discussed aggregation rules, we show that “conclusion-based voting” is less vulnerable to manipulation than “premise-based voting”, (...) which is strategy-proof only for “reason-oriented” individuals. Surprisingly, for “outcome-oriented” individuals, the two rules are strategically equivalent, generating identical judgments in equilibrium. Our results introduce game-theoretic considerations into judgment aggregation and have implications for debates on deliberative democracy. (shrink)

We present a general framework for representing belief-revision rules and use it to characterize Bayes's rule as a classical example and Jeffrey's rule as a non-classical one. In Jeffrey's rule, the input to a belief revision is not simply the information that some event has occurred, as in Bayes's rule, but a new assignment of probabilities to some events. Despite their differences, Bayes's and Jeffrey's rules can be characterized in terms of the same axioms: "responsiveness", which requires that revised beliefs (...) incorporate what has been learnt, and "conservativeness", which requires that beliefs on which the learnt input is "silent" do not change. To illustrate the use of non-Bayesian belief revision in economic theory, we sketch a simple decision-theoretic application. (shrink)

While ordinary decision theory focuses on empirical uncertainty, real decision-makers also face normative uncertainty: uncertainty about value itself. From a purely formal perspective, normative uncertainty is comparable to (Harsanyian or Rawlsian) identity uncertainty in the 'original position', where one's future values are unknown. A comprehensive decision theory must address twofold uncertainty -- normative and empirical. We present a simple model of twofold uncertainty, and show that the most popular decision principle -- maximising expected value (`Expectationalism') -- has different formulations, namely (...) Ex-Ante Expectationalism, Ex-Post Expectationalism, and hybrid theories. These alternative theories recommend different decisions, reasoning modes, and attitudes to risk. But they converge under an interesting (necessary and sufficient) condition. (shrink)

We present a new “reason-based” approach to the formal representation of moral theories, drawing on recent decision-theoretic work. We show that any moral theory within a very large class can be represented in terms of two parameters: a specification of which properties of the objects of moral choice matter in any given context, and a specification of how these properties matter. Reason-based representations provide a very general taxonomy of moral theories, as differences among theories can be attributed to differences in (...) their two key parameters. We can thus formalize several distinctions, such as between consequentialist and non-consequentialist theories, between universalist and relativist theories, between agent-neutral and agent-relative theories, between monistic and pluralistic theories, between atomistic and holistic theories, and between theories with a teleological structure and those without. Reason-based representations also shed light on an important but under-appreciated phenomenon: the “underdetermination of moral theory by deontic content”. (shrink)

In response to recent work on the aggregation of individual judgments on logically connected propositions into collective judgments, it is often asked whether judgment aggregation is a special case of Arrowian preference aggregation. We argue for the converse claim. After proving two impossibility theorems on judgment aggregation (using "systematicity" and "independence" conditions, respectively), we construct an embedding of preference aggregation into judgment aggregation and prove Arrow’s theorem (stated for strict preferences) as a corollary of our second result. Although we thereby (...) provide a new proof of Arrow’s theorem, our main aim is to identify the analogue of Arrow’s theorem in judgment aggregation, to clarify the relation between judgment and preference aggregation, and to illustrate the generality of the judgment aggregation model. JEL Classi…cation: D70, D71.. (shrink)

The essays that Jill Stauffer and Bettina Bergo collect in this volume locate multiple affinities between the philosophies of Nietzsche and Levinas. Both philosophers question the nature of subjectivity and the meaning of responsibility after the "death of God." While Nietzsche poses the dilemmas of a self without a ground and of ethics at a time of cultural upheaval and demystification, Levinas wrestles with subjectivity and the sheer possibility of ethics after the Shoah. Both argue that goodness exists independently (...) of calculative reason—for Nietzsche, goodness arises in a creative act moving beyond reaction and ressentiment; Levinas argues that goodness occurs in a spontaneous response to another person. In a world at once without God and haunted by multiple divinities, Nietzsche and Levinas reject transcendental foundations for politics and work toward an alternative vision encompassing a positive sense of creation, a complex fraternity or friendship, and rival notions of responsibility. Stauffer and Bergo group arguments around the following debates, which are far from settled: What is the reevaluation of ethics (and life) that Nietzsche and Levinas propose, and what does this imply for politics and sociality? What is a human subject—and what are substance, permanence, causality, and identity, whether social or ethical—in the wake of the demise of God as the highest being and the foundation of what is stable in existence? Finally, how can a "God" still inhabit philosophy, and what sort of name is this in the thought of Nietzsche and Levinas? (shrink)

The aggregation of individual judgments over interrelated propositions is a newly arising field of social choice theory. I introduce several independence conditions on judgment aggregation rules, each of which protects against a specific type of manipulation by agenda setters or voters. I derive impossibility theorems whereby these independence conditions are incompatible with certain minimal requirements. Unlike earlier impossibility results, the main result here holds for any (non-trivial) agenda. However, independence conditions arguably undermine the logical structure of judgment aggregation. I therefore (...) suggest restricting independence to premises, which leads to a generalised premise-based procedure. This procedure is proven to be possible if the premises are logically independent. (shrink)

The new field of judgment aggregation aims to merge many individual sets of judgments on logically interconnected propositions into a single collective set of judgments on these propositions. Judgment aggregation has commonly been studied using classical propositional logic, with a limited expressive power and a problematic representation of conditional statements ("if P then Q") as material conditionals. In this methodological paper, I present a simple unified model of judgment aggregation in general logics. I show how many realistic decision problems can (...) be represented in it. This includes decision problems expressed in languages of classical propositional logic, predicate logic (e.g. preference aggregation problems), modal or conditional logics, and some multi-valued or fuzzy logics. I provide a list of simple tools for working with general logics, and I prove impossibility results that generalise earlier theorems. (shrink)

John Broome has developed an account of rationality and reasoning which gives philosophical foundations for choice theory and the psychology of rational agents. We formalize his account into a model that differs from ordinary choice-theoretic models through focusing on psychology and the reasoning process. Within that model, we ask Broome’s central question of whether reasoning can make us more rational: whether it allows us to acquire transitive preferences, consistent beliefs, non-akratic intentions, and so on. We identify three structural types of (...) rationality requirements: consistency requirements, completeness requirements, and closedness requirements. Many standard rationality requirements fall under this typology. Based on three theorems, we argue that reasoning is successful in achieving closedness requirements, but not in achieving consistency or completeness requirements. We assess how far our negative results reveal gaps in Broome's theory, or deficiencies in choice theory and behavioral economics. (shrink)

Suppose several individuals (e.g., experts on a panel) each assign probabilities to some events. How can these individual probability assignments be aggregated into a single collective probability assignment? This article reviews several proposed solutions to this problem. We focus on three salient proposals: linear pooling (the weighted or unweighted linear averaging of probabilities), geometric pooling (the weighted or unweighted geometric averaging of probabilities), and multiplicative pooling (where probabilities are multiplied rather than averaged). We present axiomatic characterisations of each class of (...) pooling functions (most of them classic, but one new) and argue that linear pooling can be justified procedurally, but not epistemically, while the other two pooling methods can be justified epistemically. The choice between them, in turn, depends on whether the individuals' probability assignments are based on shared information or on private information. We conclude by mentioning a number of other pooling methods. (shrink)

Bayesian epistemology tells us with great precision how we should move from prior to posterior beliefs in light of new evidence or information, but says little about where our prior beliefs come from. It offers few resources to describe some prior beliefs as rational or well-justified, and others as irrational or unreasonable. A different strand of epistemology takes the central epistemological question to be not how to change one’s beliefs in light of new evidence, but what reasons justify a given (...) set of beliefs in the first place. We offer an account of rational belief formation that closes some of the gap between Bayesianism and its reason-based alternative, formalizing the idea that an agent can have reasons for his or her (prior) beliefs, in addition to evidence or information in the ordinary Bayesian sense. Our analysis of reasons for belief is part of a larger programme of research on the role of reasons in rational agency (Dietrich and List, Nous, 2012a, in press; Int J Game Theory, 2012b, in press). (shrink)

This paper offers an explanation for why some parts of philosophy have made no progress. Philosophy has made no progress because it cannot make progress. And it cannot because of the nature of the phenomena philosophy is tasked with explaining—all of it involves consciousness. Here, it will not be argued directly that consciousness is intractable. Rather, it will be shown that a specific version of the problem of consciousness is unsolvable. This version is the Problem of the Subjective and Objective. (...) Then it is argued that the unsolvability of this latter problem is why there are other unsolvable philosophy problems. (shrink)

Through modern driver assistant systems, algorithmic decisions already have a significant impact on the behavior of vehicles in everyday traffic. This will become even more prominent in the near future considering the development of autonomous driving functionality. The need to consider ethical principles in the design of such systems is generally acknowledged. However, scope, principles and strategies for their implementations are not yet clear. Most of the current discussions concentrate on situations of unavoidable crashes in which the life of human (...) beings is existentially affected. In this paper, we argue that ethical considerations should be mandatory for any algorithmic decision of autonomous vehicles, instead of a limitation to hazard situations. Such an ethically aligned behavior is relevant because autonomous vehicles, like any other traffic participants, operate in a shared public space, where every behavioral decision impacts the operational possibilities of others. These possibilities concern the fulfillment of a road-user’s safety, utility and comfort needs. We propose that, to operate ethically in such space, an autonomous vehicle will have to take its behavior decisions according to a just distribution of operational possibilities among all traffic participants. Using an application on a partially-autonomous prototype vehicle, we describe how to apply and implement concepts of distributive justice to the driving environment and demonstrate the impact on its behavior in comparison to an advanced but egoistic decision maker. (shrink)

Democratic decision-making is often defended on grounds of the ‘wisdom of crowds’: decisions are more likely to be correct if they are based on many independent opinions, so a typical argument in social epistemology. But what does it mean to have independent opinions? Opinions can be probabilistically dependent even if individuals form their opinion in causal isolation from each other. We distinguish four probabilistic notions of opinion independence. Which of them holds depends on how individuals are causally affected by environmental (...) factors such as commonly perceived evidence. In a general theorem, we identify causal conditions guaranteeing each kind of opinion independence. These results have implications for whether and how ‘wisdom of crowds’ arguments are possible, and how truth-conducive institutions can be designed. (shrink)

Under the independence and competence assumptions of Condorcet’s classical jury model, the probability of a correct majority decision converges to certainty as the jury size increases, a seemingly unrealistic result. Using Bayesian networks, we argue that the model’s independence assumption requires that the state of the world (guilty or not guilty) is the latest common cause of all jurors’ votes. But often – arguably in all courtroom cases and in many expert panels – the latest such common cause is a (...) shared ‘body of evidence’ observed by the jurors. In the corresponding Bayesian network, the votes are direct descendants not of the state of the world, but of the body of evidence, which in turn is a direct descendant of the state of the world. We develop a model of jury decisions based on this Bayesian network. Our model permits the possibility of misleading evidence, even for a maximally competent observer, which cannot easily be accommodated in the classical model. We prove that (i) the probability of a correct majority verdict converges to the probability that the body of evidence is not misleading, a value typically below 1; (ii) depending on the required threshold of ‘no reasonable doubt’, it may be impossible, even in an arbitrarily large jury, to establish guilt of a defendant ‘beyond any reasonable doubt’. (shrink)