This paper reports our research efforts on social robots that recognize interpersonal relationships. These investigations are carried out by observing group behaviors while the robot interacts with people. Our humanoid robot interacts with children by speaking and making various gestures. It identifies individual children by using a wireless tag system, which helps to promote interaction such as the robot calling a child by name. Accordingly, the robot is capable of interacting with many children, causing spontaneous group behavior from the children (...) around it. Here, group behavior is associated with social relationships among the children themselves. For example, a child may be accompanied by his or her friends and then play together with them. We propose the hypothesis that our interactive robot prompts a child’s friends to accompany him or her; thus, we can estimate their friendship by simply observing their accompanying behaviors. We conducted a field experiment for two weeks in a Japanese elementary school to verify this hypothesis. In the experiment, two “Robovie” robots were placed where children could freely interact with them during recesses. As a result, we found that they mostly prompted friend-accompanying behavior. Moreover, we could estimate some of their friendly relationships, in particular among the children who often appeared around the robot. For example, we could estimate 5% of all friendships with 80% accuracy, and 15% of them with nearly 50% accuracy. Thus, this result basically supports our hypothesis on friendship estimation from an interactive humanoid robot. We believe that this ability to estimate human relationships is essential for robots to behave socially. (shrink)

What do we do when a beloved comedian known as "America's Dad" is convicted of sexual assault? Or when we discover that the man who wrote "all men are created equal" also enslaved hundreds of people? Or when priests are exposed as pedophiles? From the popular to the political to the profound, each day brings new revelations that respected people, traditions, and institutions are not what we thought they were. Despite the shock that these disclosures produce, this state of affairs (...) is anything but new. Facing the concrete task of living well when our best moral resources are not only contaminated but also potentially corrupting is an enduring feature of human experience. In this book, Karen V. Guth identifies "tainted legacies" as a pressing contemporary moral problem and ethical challenge. Constructing a typology of responses to compromised thinkers, traditions, and institutions, she demonstrates the relevance of age-old debates in Christian theology for those who confront legacies tarnished by the traumas of slavery, racism, and sexual violence. (shrink)

If contracts cannot be fully specified Pareto optimal results may be closed off because individuals cannot rationally trust each other's promises. This paper assumes that human individuals can become internally committed not to act opportunistically and that others can detect to a certain extent whether they are dealing with an uncommitted (untrustworthy) or a committed (trustworthy) partner. Adopting an `indirect evolutionary approach' we show that co-operative commitments can survive in evolutionary competition even if conventional mechanisms like repetition, reputation, contract or (...) promising are lacking. If detection of uncommitted individuals is neither too costly nor too unreliable there will in general be a `niche' for both committed and uncommitted actors even in one off large numbers' interactions. (shrink)

Myhill-Shepherdson property in recursive function theory states that extensional effective program transformations determine continuous operations on partial functions. Case showed that this property fails to characterize acceptability of numberings of partial recursive functions. In this note we present a higher type analogue to Myhill-Shepherdson property. Our purpose is to show that higher type Myhill-Shepherdson property characterizes weak acceptability under a natural condition.

Every acceptable numbering of an effective domain is complete. Hence every effective domain admits the 2nd recursion theorem of Eršov[1]. On the other hand for every effective domain, the 1st recursion theorem holds. In this note, we establish that for effective domains, the 2nd recursion theorem is strictly more general than the 1st recursion theorem, a generalization of an important result in recursive function theory.

We study ultimatum and dictator variants of the generosity game. In this game, the first mover chooses the amount of money to be distributed between the players within a given interval, knowing that her own share is fixed. Thus, the first mover is not confronted with the typical trade-off between her own and the other’s payoff. For each variant of the game, we study three treatments that vary the range of potential pie sizes so as to assess the influence of (...) these changes on the first movers’ generosity. We find that removing the trade-off inspires significant generosity, which is not always affected by the second mover’s veto power. Moreover, the manipulation of the choice set indicates that choices are influenced by the available alternatives. (shrink)

Salloch and Eriksen (2024) address the question of how to integrate humans into Machine Learning-driven decision support systems (ML_CDSS, here generally “AI systems”). The authors suggest interpre...

This article surveys recent literature in philosophy and Christian ethics to consider how Christian ethics might benefit from attending more robustly to the potential goods of moral failure. Dominant approaches tend to treat moral failure primarily as a problem, analyzing intentions, actions, and consequences to adjudicate moral responsibility and issue action guidance. What, if any, tasks of Christian ethics might such methods neglect? This article brackets concerns about moral judgement to explore this question across four major categories of moral failure: (...) that produced by impossible situations; that produced by structural injustice; that produced because problems overwhelm our capacities for solving them; and that which results from prioritizing ‘morality’ over other moral pursuits or any one moral project at the expense of others. The article highlights goods relevant to each type, identifying the ways moral failure can foster—rather than frustrate—the aims of Christian ethics. (shrink)

John Howard Yoder's reclamation of Christ's law of love as normative for Christian ethics makes important contributions to the field, but this pacifist legacy is tainted by his sexual violence against women. Prominent "witness" and "feminist" ethicists either defend or condemn Yoder, reflecting retributive approaches to wrongdoing. Restorative justice models—with their emphasis on truth-telling, particularity, and communal responses to violence—illuminate common ground between these often antagonistic groups of ethicists, whose specific resources are needed to "do justice" to Yoder's legacy. Yoder (...) claimed that "Christian identity itself calls for feminist engagement," but he failed to fully develop this claim in his theology or embody it in his life. By collaborating in such a truly feminist pacifist politics, witness and feminist ethicists not only strengthen their own internal projects with respect to the church's mission and the promotion of women's flourishing but also more effectively address sexual violence. (shrink)

This essay reflects on the role academic journals like the JRE can play in facilitating and addressing tainted legacies. As an institution in religious ethics, the journal not only determines whose work is important, but it also replicates such judgments, passing certain sets of issues, concerns, and methods down from the past to the present, shaping future work. Journals highlight the systemic, structural elements of legacies that we often neglect in heated debate over how to respond to them. Consequently, they (...) illuminate the complexity of the problems tainted legacies present. I first discuss three ways a journal like the JRE facilitates the structural features of tainted legacies in religious ethics. I then suggest how the JRE might implement a position I call the “reformer” in response to such legacies. This position emphasizes practices of moral repair designed to challenge the systemic injustices that underlay tainted legacies. (shrink)

Die Posttraumatische Belastungsstörung (PTBS) ist ein schwerwiegendes psychisches Krankheitsbild, das Betroffene nach dem Erleben traumatisierender Situationen entwickeln. Im Zusammenhang mit den Auslandseinsätzen der Bundeswehr ist die PTBS bei Soldaten in den letzten Jahren verstärkt in den Fokus der deutschen Öffentlichkeit gerückt. Auch zivile Traumata bergen ein großes PTBS-Risiko. Seit einigen Jahren werden Methoden zur medikamentösen Prävention der PTBS erforscht. Die beiden wichtigsten Ansätze, die Prävention mit zentralnervös wirkenden Betablockern und Glukokortikoiden, basieren auf der Idee, durch den Eingriff in neuroendokrine Stressachsen (...) Einfluss auf die Art und Weise zu nehmen, in der die Erinnerung im Gedächtnis konsolidiert wird. Durch eine Entemotionalisierung und Abschwächung entsprechender Gedächtnisspuren soll das spätere Auftreten einer PTBS verhindert werden. Beide Ansätze zeigen in Pilotstudien vielversprechende Ergebnisse. Angesichts der herausragenden Bedeutung des Gedächtnisses für Individuum und Gesellschaft sollten Ansätze zur medikamentösen Gedächtnismodifikation (MGM) unter neuroethischen Gesichtspunkten diskutiert und bewertet werden. Der Text beleuchtet die MGM zur PTBS-Prävention entlang von fünf Problemachsen: 1) der Einflussnahme von MGM auf den Prozess der normalen psychischen Verarbeitung traumatischer Erlebnisse, 2) der Gefahr einer Entkopplung von Erinnerung und Realität, 3) der Bedeutung von emotionaler Erinnerung für die Moral, 4) der sozialen, juristischen und historischen Relevanz einer wahrhaftigen Erinnerungskultur und 5) der potenziellen Förderung eines gesellschaftlichen Medikalisierungsprozesses. Trotz ernsthaft zu diskutierender ethischer Bedenken ist – vor dem Hintergrund der Schwere des Krankheitsbilds – aus unserer Sicht eine MGM zur PTBS-Prävention grundsätzlich begrüßenswert, sollte jedoch derzeit nur im Rahmen klinischer Studien erfolgen. Hierfür stellen wir acht forschungsethische Aspekte zur Diskussion, die bei solchen Studien zu berücksichtigen sind. (shrink)

Many Christians treat marriage as a covenant. An influential group of contemporary Christians argues that covenant marriage provides a response to what they regard as the social ills of high divorce rates and the ‘breakdown’ of the traditional family. These Christians often look to John Calvin's marriage theology for inspiration because he linked treating marriage as a covenant to regarding marriage as sacred and indissoluble. In this article I cast doubt on the wisdom of treating marriage as a covenant. I (...) develop a critical genealogy that shows Calvin's marriage theology oppressed women by reinforcing their subordination to men and trapping women in abusive marriages. I then argue that recent social science suggests covenant marriage functions similarly among contemporary Christians. I consider whether a non-oppressive form of covenant marriage can be developed, before suggesting that we cannot yet know whether covenant marriage is salvageable. (shrink)

Scholars celebrate Dietrich Bonhoeffer as a "prophet of justice for the oppressed" who identified the need "to see the great events of world history from below." But few address the thorniest aspect of Bonhoeffer's ethics for the marginalized: the mandates or divine commissions in church, marriage, work, and government made concrete within certain orders of relationship and authority. Bonhoeffer's marriage mandate poses particular problems as it reinforces unjust social structures. Fortunately, striking similarities between Bonhoeffer's ethics and feminist thought—attention to concrete (...) contexts, the role of emotion in moral reasoning, opposition to harmful dualisms, and emphasis on relationality—suggest that feminists are well-placed to critique and reconstruct Bonhoeffer's account. Construing the mandates as contexts for "genuine communities of argument" repurposes them to combat rather than condone injustice. (shrink)

Applying an evolutionary framework, we investigate how a reputation mechanism and a buyer insurance (as used on Internet market platforms such as eBay) interact to promote trustworthiness and trust in markets with moral hazard problems. Our analysis suggests that the costs involved in giving reliable feedback determine the gains from trade that can be obtained in equilibrium. Buyer insurance, on the other hand, can affect the trading dynamics and equilibrium selection. We find that, under reasonable conditions, buyer insurance crowds out (...) trust, and trustworthiness. (shrink)

Different evaluators typically disagree how to rank different candidates due to their idiosyncratic concerns for the various qualities of the candidates. Our ranking mechanism asks all evaluators to submit individual bids assigning a monetary amount for each possible rank order. The rules specify for all possible vectors of such individual bids the collectively binding rank order of candidates and the payments, due to the different evaluators. Three requirements uniquely determine procedurally fair ranking rules as a game form. Only when additionally (...) assuming exogenously given true evaluations of collective rankings, which may be commonly or only privately known, and—in case of private information—beliefs concerning the evaluations by others, this game form determines proper games and allows for equilibrium analysis. After an illustration, the approach is adjusted to situations where one wants to rank only acceptable sets of candidates thus rendering the mechanism even more attractive. (shrink)

The implementation of a new kidney allocation algorithm by Eurotransplant was a ‘rule choice’ with serious ethical, legal, and political implications. Eurotransplant made that choice in view of a careful analysis of empirically predictable consequences of alternative rule specifications. This paper studies in a stylized way how the decision on the allocation algorithm emerged. Hopefully an understanding of central features of the described successful case of initiating improvements may be helpful in other cases with a similar structure.

Consistency and optimality together with converse consistency provide an illuminating and novel characterization of the equilibrium concept (Peleg and Tijs, 1996). But (together with non-emptiness) they preclude refinements of the equilibrium notion and selection of a unique equilibrium (Norde et al., 1996). We suggest two escape routes: By generalizing the concept of strict equilibrium we question the practical relevance of the existence requirement for refinements. To allow for equilibrium selection we suggest more complex reduced games which capture the inclinations of (...) ``players who already left''. (shrink)

Simple game experiments of the reward allocation, dictator and ultimatum type are used to demonstrate that true explanations of social phenomena cannot conceivably be derived in terms of the perfect rationality concept underlying neo-classical economics. We explore in some depth, if speculatively, how experimental game theory might bring us closer to a new synthesis or at least the nucleus of a general theory of ‘games and boundedly rational economic behavior’ with enhanced explanatory power.

The main results of our indirect evolutionary approach to trust in large interactions suggest that trustworthiness must be detectable if good conduct in trust-relationships is to survive. According to theoretical reasoning there is a niche then for an organization offering a (possibly) costly service of keeping track of the conduct of participants on the net. We compare traits of an organizational design as suggested by economic reasoning with those that actually emerged and ask whether institutions like eBay will increasingly have (...) to ‘economize on virtue’ although so far they could rely on its spontaneous provision. (shrink)

In contemporary reflection on Christianity and politics, the work of realist, witness, and feminist theologians has been done in isolation--that is, each school has largely pursued its projects without incorporating the insights of others. Christian Ethics at the Boundary offers the first approach to public and political theology developed at the boundaries that separate these approaches.

This essay assesses the oft‐made link between Walter Rauschenbusch and Martin Luther King Jr. Denying neither Rauschenbusch’s influence on King nor King’s social gospel status, it nevertheless questions the way historians locate Rauschenbusch’s legacy in King and the civil rights movement. This strategy, however unintentionally, reproduces the white social gospel’s “astigmatism” on race and undermines the contributions of black social gospel (and other neglected) leaders even as revised histories affirm them. After exploring King’s references to Rauschenbusch and Rauschenbusch’s reflections on (...) race, the paper compares their theologies. This comparison reveals key differences on race and economic justice that ramify across Rauschenbusch’s and King’s distinctive articulations of social gospel categories, further complicating historians’ claims on King. Oversimplifying the connection between these important figures in religious ethics distorts theological understanding of social gospel legacies and compromises their power for future generations. (shrink)

The prevalence of tainted legacies within Christian ethics, across the academy, and in contemporary public debate raises difficult questions about handling legacies implicated in traumatic pasts. This essay uses the concept of moral injury to illuminate the moral complexities of tainted religious legacies and employs feminist and womanist ethics to provide strategies for moral repair in the wake of these and other such legacies. It first argues that, despite significant limitations, moral injury provides purchase on the experience of encountering tainted (...) religious legacies by naming the type of agency involved, describing the moral harm tainted legacies cause, and highlighting the social and institutional context of that harm. It then argues that feminist and womanist responses to morally injurious forms of Christianity—particularly explorations of redemptive suffering—not only resonate with responses to Yoder’s case and other tainted legacies current in public debate but also provide criteria for assessing those responses. (shrink)

Whereas Brian Skyrms in his chapter views rationality and evolution as alternative ways to derive decision behaviour, indirect evolution allows us to combine the two approaches. By focussing on Skyrms’ examples it will be illustrated how optimal decisions for given rules of interaction can influence the future rules of interaction. Here evolution does not determine behaviour directly, but only indirectly via the rules. We, furthermore, report on an experiment, related to Skyrms’ examples, revealing effects of deliberation in the sense of (...) forward-looking considerations and of path dependence in the sense of adapting to past success. (shrink)

SCHOLARS OFTEN VIEW MARTIN LUTHER KING JR.'S CONTRIBUTIONS TO political theology in the context of his philosophy of nonviolence. Drawing on feminist and womanist thought, I reconstruct King's theopolitical practice to construe nonviolence more broadly as including any "agapic activity" that forms and sustains community. In doing so, I uncover in King's thought a conception of agape that resonates with feminist emphasis on the relational and community-oriented nature of love, and I draw on womanist thought to highlight the role of (...) creativity, not solely love or justice, to King's ethical thinking. Both emphases suggest a vision of churches as communities of creativity with community-creating practices at the heart of their political roles. (shrink)

This paper explores the power of womanist ethics to illuminate the Confederate monuments debate. First, I draw on Emilie Townes’s analysis of the “cultural production of evil” to construe Confederate monuments as products of the “fantastic hegemonic imagination” that render visible for whites the invisibility of “whiteness.” Second, I argue that Angela Sims’s work on lynching provides a vivid example of how “countermemory” functions as an antidote to the fantastic hegemonic imagination. Finally, I argue that Delores Williams’s re-evaluation of the (...) cross as a sacred symbol enables a reading of Confederate monuments as realist symbols of violence that require displacement from the center to the periphery of national sacred space. I conclude that although the debate on Confederate monuments is important, womanist analysis warns against an overly-narrow focus on this issue, lest we neglect the already obscured gendered, classist, homophobic, and xenophobic dimensions of structural injustice that the monuments represent. (shrink)