In this paper we describe an argumentation-based representation of normal form games, and demonstrate how argumentation can be used to compute pure strategy Nash equilibria. Our approach builds on Modgil’s Extended Argumentation Frameworks. We demonstrate its correctness, showprove several theoretical properties it satisfies, and outline how it can be used to explain why certain strategies are Nash equilibria to a non-expert human user.

A gradual semantics takes a weighted argumentation framework as input and outputs a final acceptability degree for each argument, with different semantics performing the computation in different manners. In this work, we consider the problem of attack inference. That is, given a gradual semantics, a set of arguments with associated initial weights, and the final desirable acceptability degrees associated with each argument, we seek to determine whether there is a set of attacks on those arguments such that we can obtain (...) these acceptability degrees. The main contribution of our work is to demonstrate that the associated decision problem, i.e., whether a set of attacks can exist which allows the final acceptability degrees to occur for given initial weights, is NP-complete for the weighted h-categoriser and card-based semantics, and is polynomial for the weighted max-based semantics, even for the complete version of the problem (where all initial weights and final acceptability degrees are known). We then briefly discuss how this decision problem can be modified to find the attacks themselves and conclude by examining the partial problem where not all initial weights or final acceptability degrees may be known. (shrink)

The combination of increased availability of large amounts of fine-grained human behavioral data and advances in machine learning is presiding over a growing reliance on algorithms to address complex societal problems. Algorithmic decision-making processes might lead to more objective and thus potentially fairer decisions than those made by humans who may be influenced by greed, prejudice, fatigue, or hunger. However, algorithmic decision-making has been criticized for its potential to enhance discrimination, information and power asymmetry, and opacity. In this paper, we (...) provide an overview of available technical solutions to enhance fairness, accountability, and transparency in algorithmic decision-making. We also highlight the criticality and urgency to engage multi-disciplinary teams of researchers, practitioners, policy-makers, and citizens to co-develop, deploy, and evaluate in the real-world algorithmic decision-making processes designed to maximize fairness and transparency. In doing so, we describe the Open Algortihms project as a step towards realizing the vision of a world where data and algorithms are used as lenses and levers in support of democracy and development. (shrink)

Science studies has often been against the normative dimension of epistemology, which made a naturalistic study of science impossible. But this is not to say that a new type of normativity cannot be detected at work inscience studies. This is especially true in the second wave of studies dealing with the body, which has aimed at criticizing the physicalization of the body without falling into the various traps of a phenomenology simply added to a physical substrate. This article explores the (...) work of Isabelle Stengers and Vinciane Despret in that respect, and shows how it can be used to rethink the articulation between the various levels that make up a body. (shrink)

Eye movements during mental imagery are not epiphenomenal but assist the process of image generation. Commands to the eyes for each fixation are stored along with the visual representation and are used as spatial index in a motor‐based coordinate system for the proper arrangement of parts of an image. In two experiments, subjects viewed an irregular checkerboard or color pictures of fish and were subsequently asked to form mental images of these stimuli while keeping their eyes open. During the perceptual (...) phase, a group of subjects was requested to maintain fixation onto the screen's center, whereas another group was free to inspect the stimuli. During the imagery phase, all of these subjects were free to move their eyes. A third group of subjects (in Experiment 2) was free to explore the pattern but was requested to maintain central fixation during imagery. For subjects free to explore the pattern, the percentage of time spent fixating a specific location during perception was highly correlated with the time spent on the same (empty) locations during imagery. The order of scanning of these locations during imagery was correlated to the original order during perception. The strength of relatedness of these scanpaths and the vividness of each image predicted performance accuracy. Subjects who fixed their gaze centrally during perception did the same spontaneously during imagery. Subjects free to explore during perception, but maintaining central fixation during imagery, showed decreased ability to recall the pattern. We conclude that the eye scanpaths during visual imagery reenact those of perception of the same visual scene and that they play a functional role. (shrink)

Latour in this essay criticizes and abandons the approach to science studies—in which the object of study is presumed to be inert and passively circulating amid networks of practices, institutions, authorities, and historical events — that he took in “The ‘Pédofil’ of Boa Vista,” an article published in the spring 1995 issue of Common Knowledge. Here he argues that Whitehead’s neglected text Process and Reality offers the possibility of a radical historical realism that puts the scientific object and the scientist’s (...) laboratory on the same footing. His case study is of the Lille laboratory where, in 1858, Pasteur identified a yeast responsible for lactic fermentation. Even as Pasteur acted to cause the yeast to emerge, he felt—in a way that practicing scientists often attest—that he was “led” to do so by the propensity of things. Whitehead enables us to understand that it was not Pasteur alone who altered the representation of fermentation; the fermentation itself modified its manifestation. Hence there is historicity not only on the human side of scientific discovery—the story of Pasteur and his yeast—but also historicity on the nonhuman side—the story of the yeast and its Pasteur. (shrink)

Brain imaging studies suggest that truth telling constitutes the default of the human brain and that lying involves intentional suppression of the predominant truth response. By manipulating the truth proportion in the Sheffield lie test, we investigated whether the dominance of the truth response is malleable. Results showed that frequent truth telling made lying more difficult, and that frequent lying made lying easier. These results implicate that the accuracy of lie detection tests may be improved by increasing the dominance of (...) the truth response and that habitual lying makes the lie response more dominant. (shrink)

Republicanism is a powerful resource for emancipatory struggles against domination. Its commitment to popular sovereignty subverts justifications of authority, locating power in the hands of the citizenry who hold the capacity to create, transform, and maintain their political institutions. Republicanism's conception of freedom rejects social, political, and economic structures subordinating citizens to any uncontrolled power - from capitalism and wage-labour to patriarchy and imperialism. It views any such domination as inimical to republican freedom. Moreover, it combines a revolutionary commitment to (...) overturning despotic and tyrannical regimes with the creation of political and economic institutions that realise the sovereignty of all citizens, institutions that are resilient to threats of oligarchical control. This volume is dedicated to retrieving and developing this radical potential, challenging the more conventional moderate conceptions of republicanism. It brings together scholars at the forefront of tracing this radical heritage of the republican tradition, and developing arguments, texts, and practices into a critical and emancipatory body of political and social thought. The volume spans historical discussions of the English Levellers, French and Ottoman revolutionaries, and American abolitionists and trade unionists; explorations of the radical republican aspects of the thought of Machiavelli, Marx, and Rousseau; and theoretical examinations of social domination and popular constitutionalism. It will appeal to political theorists, historians of political thought, and political activists interested in how republicanism provides a robust and successful radical transformation to existing social and political orders. (shrink)

This article argues that using Joseph Raz’s service conception of authority to reject philosophical anarchism can be affected by political anarchism. Whereas philosophical anarchism only denies the authority of the state, political anarchism claims that anarchism is a better alternative to the state. Raz’s theory holds that an institution has authority if it enables people to better conform with reason. I argue that there are cases where anarchism is an existing alternative to the state and better fulfils this condition. Consequently, (...) in these cases, anarchist groups and societies and not the state have legitimate authority. When anarchism is not an existing alternative to the state, the state will, under Raz’s theory, have some legitimate authority, but that authority will be limited because anarchism remains a better possible alternative to the state. To support the political anarchist claim I discuss the anarchist collectives during the Spanish civil war, which I argue are an example of anarchism as an existing alternative to the state that better fulfils Raz’s service conception and also provide suggestive evidence that anarchism is in general a better possible alternative. I also discuss the relationship between political anarchism and authority and I argue that despite some tension they are not irreconcilable. I conclude that the interesting anarchist challenge for political theorists is political not philosophical. (shrink)

Technology is epistemology’s poor relative. It still carries the baggage of a definition of matter handed down to it by another odd definition of scientific activity. The consequence is that many descriptions of “things” have nothing “thingly” about them. They are simply “objects” mistaken for things. Hence the necessity of a new descriptive style that circumvents the limits of the materialist definition of material existence. This is what has been achieved in the group of essays on “Thick Things” for which (...) this note serves as an afterword. (shrink)

Game theory is the systematic study of interdependent rational choice. It should be distinguished from decision theory, the systematic study of individual (practical and epistemic) choice in parametric contexts (i.e., where the agent is choosing or deliberating independently of other agents). Decision theory has several applications to ethics (see Dreier 2004; Mele and Rawlings 2004). Game theory may be used to explain, to predict, and to evaluate human behavior in contexts where the outcome of action depends on what several agents (...) choose to do and where their choices depend on what others choose to do. (See the entry on game theory) Game theory consequently is relevant to ethics, and it is used in moral and political philosophy in a variety of ways. We shall concentrate on the influence and use of game theory in ethics and those parts of political theory involving norms or principles of justice, ignoring questions about political and legal institutions on the one hand and questions about issues dealing with moral virtues on the other. (shrink)

To become aware of the depth of the ecological mutation, one has to criticize the notion of abstract space. It turns out that, in many of his works, Carl Schmitt has found ways to politicize the production of neutral depoliticized space. This is especially true in “Dialogue on New Space.” The dialogue summarizes Schmitt’s earlier works, but it also tries to relate, audaciously, the character of being human with the different conceptions of space entertained by each protagonist of the dialogue. (...) Especially important in the plot is the interpretation of the expression of “unencumbered technology” that Schmitt associates with the destiny of liberalism and the sort of spatial domination ad infinitum that it implies. The final point of the dialogue is that you cannot be really human in the wrong space. The article does not pretend to make Schmitt a thinker of ecology but to extract from his highly peculiar critique of space something that could be useful to help criticize a depoliticized notion of green space. (shrink)

When formulating the concept of the impulse-image, Deleuze never tires of asserting that these images are saturated with death and obsessed by degradation. They stand at a curious intersection in the taxonomy of images, a constitutively in-between space: they are formally inserted between affection-image and action-image in The Movement-Image, but produce a direct passage to the time-image. However, they do not reach the time-image due to obsession by the negative effects of time. This article introduces the concept of the impulse-image (...) in Deleuze's work on the impulse and death instinct, in his fundamental texts of the 1960s and 1970s, including his collaboration with Félix Guattari. The death instinct in the late 1960s was a transcendental principle that acquired the form of the groundless or crack-up essential for the production of difference. It is at this time that Deleuze publishes Zola and the Crack-up, an embryonic essay for what would later become the impulse-image. In the 1970s, Deleuze, along with Guattari, fought the need to include a groundless force in the mould of the death instinct. Speaking of cinema in the 1980s, which is when he returns to the impulse theme, one finds characteristics of both preceding periods, especially the structure conceived in the 1960s, associated with the criticism of the 1970s. However, Deleuze now stands apart, recognising a naturalistic image and admiring a practice of symptomatology, but pointing out that his own understanding of the world does not lie in it. With the impulse-images, Deleuze also plays a relevant role in studies of film naturalism, shaping a powerful concept for studies of contemporary naturalistic symptomatologies that emerge in situations of misery of civilisation. (shrink)

Neuropsychological studies suggest the existence of lateralized networks that represent categorical and coordinate types of spatial information. In addition, studies with neural networks have shown that they encode more effectively categorical spatial judgments or coordinate spatial judgments, if their input is based, respectively, on units with relatively small, nonoverlapping receptive fields, as opposed to units with relatively large, overlapping receptive fields. These findings leave open the question of whether interactive processes between spatial detectors and types of spatial relations can be (...) modulated by spatial attention. We hypothesized that spreading the attention window to encompass an area that includes two objects promotes coordinate spatial relations, based on coarse coding by large, overlapping, receptive fields. In contrast, narrowing attention to encompass an area that includes only one of the objects benefits categorical spatial relations, by effectively parsing space. By use of a cueing procedure, the spatial attention window was manipulated to select regions of differing areas. As predicted, when the attention window was large, coordinate spatial transformations were noticed faster than categorical transformations; in contrast, when the attention window was relatively smaller, categorical spatial transformations were noticed faster than coordinate transformations. Another novel finding was that coordinate changes were noticed faster when cueing an area that included both objects as well as the empty space between them than when simultaneously cueing both areas including the objects while leaving the gap between them uncued. (shrink)

Recent events and popularized stereotypes call into question the ethics of salesperson behaviors. Although prior research demonstrates that salespeople’s emotional exhaustion can have negative consequences for several job outcomes, little is known about the factors that can mitigate such relationships—particularly the relationship between emotional exhaustion and ethical behavior. To remedy this knowledge gap, we draw from self-control theory to propose a novel theoretical framework and develop hypotheses. These hypotheses are tested on a unique dataset consisting of survey data collected from (...) 123 matched business-to-business salesperson–manager dyads. The findings reveal that emotional exhaustion is negatively associated with sales performance, emotional exhaustion is negatively associated with ethical behaviors, ethical behaviors are positively associated with sales performance, ethical behaviors mediate emotional exhaustion’s negative effect on sales performance, perceived supervisor support attenuates the negative association between emotional exhaustion and ethical behaviors, and contrary to expectations, grit strengthens the negative association between emotional exhaustion and ethical behaviors. As we show here, perceived supervisor support may attenuate the undesirable effects of emotional exhaustion on ethical behaviors and sales performance. The article’s broader contribution thus lies in its suggestion that managers pay special attention to these factors. Moreover, factors such as grit can have unexpected and undesirable influences; therefore, we draw attention to the importance of scrutinizing these interactions, even when the factors involved are almost universally touted as beneficial. Theoretical and practical implications of the research are discussed. (shrink)

In Intuition et idéalités: Phénoménologie des objets mathématiques (2020), Dominique Pradelle questioned the nature of mathematical knowledge–the status of math.

We propose a new theory based on the notions of marginal and large difference which has natural models in the context of nonstandard mathematics. We introduce the notion of finite marginality and show a representation result which ensures, for finitely marginal countable models, the existence of a homomorphism of the structure of marginal and large difference into a nonstandard model of the natural numbers, and show the extent to which any such homomorphism is unique. Finally, we show that our theory (...) constitutes part of the underlying abstract structure of three distinct philosophical theories of vagueness: Dean’s neofeasibilism, Itzhaki’s theory of nonstandard heuristics, and our own initial sketch of a nonstandard primitivism about vagueness. (shrink)

The term “race,” and the concept it refers to, namely genetically different human populations in the world, is one of the most intellectually and emotionally charged in society, and in science as well. This article focuses on how human beings recognize individual faces of their own versus another “racial group,” and the term “face race” is used in the context of visual recognition, as traditionally done in the scientific literature. The article reviews the well-known phenomenon that people have greater difficulty (...) distinguishing and recognizing individual faces from a different human population, or “race,” than their own. Experience-based holistic accounts encompass and extend most other proposals, such as a more densely clustered organization of other-race faces in an internal face-space centered on a “norm,” and it leads to a number of interesting predictions about the processing of same race and other-race faces. (shrink)

Both issues of the Journal of Consciousness Studies on ‘Art and the Brain’[ Vol.6, No.6/7; Vol.8, No.8/9] were enlightening yet seriously lacking. As a musician, it was disconcerting to read such a wide-ranging title and discover that there was nothing pertinent about music and hearing, the performing arts and other forms of art. I concur with most of the criticisms made here and there, including those on jcs-online, in particular the contributions by Amy Ione and Donnya Wheelwell in the second (...) issue. The following comments and observations explain why I find the overall treatment of art in these issues completely unsatisfactory. (shrink)

Bernardi, Bruno | : L’analyse d’un passage peu commenté du Contrat social montre que Rousseau aborde d’une façon singulière la problématique aussi classique qu’actuelle des rapports entre liberté et sécurité. La position de sujet et celle de citoyen découlent toutes deux de la nature du corps politique. Elles sont porteuses de deux types d’exigences : la protection des personnes et des biens dans un cas, celle de la liberté civile et politique dans l’autre. Rousseau n’oppose pas ces exigences entre (...) elles mais distingue les deux ordres de priorité qu’elles rendent possibles. La politique du citoyen consiste à faire de la liberté la condition de la sécurité. (shrink)

En posant la question de la nature vivante à partir des travaux hétérophénoménologiques de Daniel Dennett, il s?agira pour nous ici d?aborder deux problèmes philosophiques majeurs, à savoir, d?une part, celui de la naturalisation de propriétés émergentes de la matière comme la vie ou la conscience, et, d?autre part, celui des éventuels partages entre l?homme, l?animal et la machine et de la spécificité anthropologique. Le premier problème, qui est celui des philosophies de la vie puis des philosophies de l?esprit, concerne (...) donc la possibilité d?expliquer dans les termes des sciences de la nature certaines propriétés comme la vie ou la conscience, lesquelles « surviennent » dans certaines circonstances sur les propriétés universelles de la matière. Or, à cet égard, si les développements extraordinaires qu?a connus la biologie ces cent cinquante dernières années semblent aujourd?hui affaiblir l?affirmation antinaturaliste de l?irréductibilité de la « force vitale » aux propriétés physico-chimiques, le débat reste par contre très vif en ce qui concerne la réductibilité de la conscience, c?est-à-dire la possibilité pour les sciences cognitives et la neurophysiologie de rendre compte de la conscience dans ses aspects phénoménaux autant qu?intentionnels par des lois naturelles. Dans la mesure où certains de ceux qui s?opposent le plus radicalement à ce programme naturaliste au nom du caractère. (shrink)