The maze and the masses -- Democracy as the rule of the dumb many? -- A selective genealogy of the epistemic argument for democracy -- First mechanism of democratic reason: inclusive deliberation -- Epistemic failures of deliberation -- Second mechanism of democratic reason: majority rule.

ABSTRACTThe idea that the crowd could ever be intelligent is a counterintuitive one. Our modern, Western faith in experts and bureaucracies is rooted in the notion that political competence is the purview of the select few. Here, as in my book Democratic Reason, I defend the opposite view: that the diverse many are often smarter than a group of select elites because of the different cognitive tools, perspectives, heuristics, and knowledge they bring to political problem solving and prediction. In this (...) essay I defend my epistemic argument against proceduralist democrats; the value of model thinking against empiricists; the bracketing of fundamental value diversity against critics who see such diversity as an essential feature of politics; the intelligence of the masses in the face of voter ignorance and systematic biases; and the normative priority of democracy over market mechanisms. I also consider challenges to my use of Hong and Page's formal results, the epistemically proper selection method for representatives, and the role of deliberation in problem solving. I finally chart three avenues for further research. (shrink)

Consensus plays an ambiguous role in deliberative democracy. While it formed the horizon of early deliberative theories, many now denounce it as an empirically unachievable outcome, a logically impossible stopping rule, and a normatively undesirable ideal. Deliberative disagreement, by contrast, is celebrated not just as an empirically unavoidable outcome but also as a democratically sound and normatively desirable goal of deliberation. Majority rule has generally displaced unanimity as the ideal way of bringing deliberation to a close. This article offers an (...) epistemic perspective on this question of consensus versus disagreement. For ensuring the production of better decisions, we argue, the normative appeal of consensus varies depending on the deliberative task – whether it entails problem solving or prediction. We argue that in pure problem-solving contexts, consensus retains a strong normative appeal and forms the ideal deliberative outcome of deliberation. In contrast, on predictive tasks, consensus should generally not be used as a stopping rule noris it likely to be epistemically desirable as an outcome. Instead deliberators may be better served by ending the deliberation with a form of deliberative disagreement we call ‘positive dissensus’, which paves the way for more accurate aggregate predictions. (shrink)

This paper argues in favor of the epistemic properties of inclusiveness in the context of democratic deliberative assemblies and derives the implications of this argument in terms of the epistemically superior mode of selection of representatives. The paper makes the general case that, all other things being equal and under some reasonable assumptions, more is smarter. When applied to deliberative assemblies of representatives, where there is an upper limit to the number of people that can be included in the group, (...) the argument translates into a defense of a specific selection mode of participants: random selection. (shrink)

The use of information technology in linguistic research gave rise in the 1950s to what is known as Natural Language Processing, but that framework was created without paying due attention to the need for logical reconstruction of linguistic concepts which were borrowed directly from barely formalised structural linguistics. The Computer-aided Acquisition of Semantic Knowledge project based on the Knowledge Discovery in Databases technology enabled us to interact with computers while gathering and improving our knowledge about languages. Thus, with the help (...) of data mining tools, as a result of revisiting two sorts of generally admitted linguistic theories, we succeeded in improving these local linguistic approaches by proposing to unify the Associative Semantics theory with the Meta-Informative Centering theory. The resulting Distributed Grammar program treats, in addition to the above types of information, the third one, para-information which – despite many studies – had no uniform theoretical background in general linguistics. This DG program aims to lay the foundations for creating the theoretical background of Conceptual Linguistics. (shrink)

The purpose of this article is to show how schizophrenia, understood as a distortion of the most intimate structures of subjectivity, illustrates the nature of subjectivity as such, while at the same time how philosophical considerations may help to understand schizophrenia. More precisely, schizophrenic experiences of self-alienation seem to reflect a congealing or concretization of a form of differentiation or potential alterity implicit in the dynamic nature of subjectivity. In other words, we propose that the structure of subjectivity includes potential (...) divisions and fissures that condition the experiences of radical self-alienation seen in schizophrenia. In order to elucidate how this alterity emerges within the self in schizophrenia and in order to consider its conditions of possibility we examine the disorders of the self as described in phenomenological psychopathology. We especially use the work of the Japanese psychiatrists Mari Nagai, her teacher Bin Kimura, and the French psychiatrist Henry Ey, supplemented with clinical material from our own research. Finally, we shed light on the development of the psychotic symptoms such as hallucinations and delusions, which are understood as the expressions of a radical alterization of the self. (shrink)

The concrete insertion of nurses into the context of an inquiry contributes to empirical evaluation research of health promotion programs. As interveners and concrete actors in social movements, nurses are in a privileged position to give realism to a local understanding of the political and cultural context of evaluative research. Drawing on the practice of empirical evaluation research, this paper seeks to generate new methodological approaches in a way that broadens nursing inquiries in community health nursing. It explores new ways (...) of thinking about epistemology and knowledge production in nursing practice. For 5 months an evaluative research project adopting a participatory‐action research approach was conducted with local community actors in an AIDS prevention project in Amazonas (Brazil) in a prostitution setting. An auto‐ethnographic journal was used as a reflective approach for the critical analysis of nursing research activities. This paper calls for a closer relationship between scientific research settings and the sociopolitical and the sociocultural aspects of nursing practice. It increases an incorporation of popular, social and professional experiential learning and skill acquisition in embedded knowledge production. (shrink)

Disclosure is a common response to conflicts of interest; it is intended to expose the conflict to scrutiny and enable it to be appropriately managed. For disclosure to be effective the receiver of the disclosure needs to be able to use the information to assess how the conflict may impact on their interests and then implement a suitable response. The act of disclosure also creates an expectation of self-regulation, as the person with the conflicting interests will be mindful of their (...) own potential biases and aware that their decisions may be monitored. This article discusses some of the problems of relying on disclosure as a solution to address conflicts of interest in research, including the added complexities around institutional conflicts of interest. The case of Dan Markingson illustrates these issues and highlights the vulnerable position relying on disclosure as a solution leaves research participants in. (shrink)

Chronic kidney failure is a serious somatic disease. Addressing the issue of living with a chronic disease means fully considering the patients’ entourage, their families, and those close to them, especially their children and spouses.Objectives: The present paper focuses on the couple’s psychological experience when one of them suffers from a chronic disease, in this instance kidney disease. In particular, how is the spouse affected by the treatment provided? The aim is not only to see how care for sick people (...) can be improved, but also, more specifically, how relatives and especially partners can receive attention.Methodology: A qualitative approach is not only adopted, being based on the psychotherapeutic follow-up of the partners of patients with chronic kidney disease, but also of the patients themselves, addressing the matter of their life as a couple. Three couples were considered, and two case studies are presented here. The issues that cut across these different situations are examined.Results and Discussion: Some couples show considerable resourcefulness. However, over the years, that capacity for adaptation and inventiveness can also be interrupted by the periods of greater suffering and even despair, especially when the somatic pathology becomes chronic. Many spouses talk about how living with a sick partner weighs down on them, causing severe fatigue. Some aspects of the illness can also become traumatic. The disease regularly disrupts the daily life of the couple and the family. This leads to a reworking of family relations. Each couple has its own history with the condition. As it emerges, it can disrupt the bonds of filiation, especially when the illness is hereditary. Making psychological care more accessible to the partners involved constitutes a major challenge for our hospital care systems. (shrink)

In the burgeoning debate about neuroscience’s role in contemporary society, the issue of brain optimization, or the application of neuroscientific knowledge and technologies to augment neurocognitive function, has taken center stage. Previous research has characterized media discourse on brain optimization as individualistic in ethos, pressuring individuals to expend calculated effort in cultivating culturally desirable forms of selves and bodies. However, little research has investigated whether the themes that characterize media dialogue are shared by lay populations. This article considers the relationship (...) between the representations of brain optimization that surfaced in a study of British press coverage between 2000 and 2012 and interviews with forty-eight London residents. Both data sets represented the brain as a resource that could be manipulated by the individual, with optimal brain function contingent on applying self-control in one’s lifestyle choices. However, these ideas emerged more sharply in the media than in the interviews: while most interviewees were aware of brain optimization practices, few were committed to carrying them out. The two data sets diverged in several ways: the media’s intense preoccupation with optimizing children’s brains was not apparent in lay dialogue, while interviewees elaborated beliefs about the underuse of brain tissue that showed no presence in the media. This article considers these continuities and discontinuities in light of their wider cultural significance and their implications for the media–mind relationship in public engagement with neuroscience. (shrink)

On September 3, 2015, the Political Epistemology/ideas, Knowledge, and Politics section of the American Political Science Association sponsored a roundtable on epistemic democracy as part of the APSA’s annual meetings. Chairing the roundtable was Daniel Viehoff, Department of Philosophy, University of Sheffield. The other participants were Jack Knight, Department of Political Science and the Law School, Duke University; Hélène Landemore, Department of Political Science, Yale University; and Nadia Urbinati, Department of Political Science, Columbia University. We thank the participants for (...) permission to republish their remarks, which they edited for clarity after the fact. (shrink)

Ce mini-dossier compte parmi les résultats d’un travail de séminaire de longue haleine, développé au cours d’un cycle de trois ans, portant sur les théories philosophiques du signe de l’Antiquité à nos jours, organisé à l’UMR STL 8163 par Claudio Majolino et Laurent Cesalli. Au sein de l’arc temporel visé par ce séminaire, le XVIIe siècle avait d’emblée une place privilégiée : conçu comme un siècle de rupture qui inaugure la période moderne, il illustre surtout, en particulier dep...

The purpose of this paper is to draw attention to a similarity between an ancient and a modern theory of living nature. There is no need to present the Aristotelian doctrine in full detail. I must rather apologize for repeating much that is well known. My endeavour is to offer it for comparison, and, incidentally, to clear it from misrepresentation. Uexküll's theory, on the other hand, is little known, and what is given here is an insufficient outline of it. I (...) do not maintain that either doctrine is right. I am fully aware that the problem of the essence of living nature by no means admits of an éasy solution. In offering for consideration the comparison contained in this paper I would go no farther than owning my belief that the two authors here discussed, both thinkers who combine an intensely philosophical outlook with a wide biological experience, are worth the attention not only of the historian of science and philosophy, but also of the student of philosophical biology. (shrink)

Toward illuminating the structure of Llewellyn's dream theory, I compare it in formal terms to Freud's dream theory. An alternative to both of these dream machines, grounded in the distribution of cholinergic activation in the central nervous system, is presented. It is suggested that neither nor dream theory is sufficient to account for the properties of dreams.

By drawing up a model of the internal communication system of Bangladeshi ready-made garment factories, Helene Blumer identifies the existence and intensity of its communication flows. She furthermore discloses a connection from this communication system to labor unrest. The absence of a functioning formal channel within the factory, the lack of effective labor representation and the rare physical presence of the factory owners confirm the existence of a communication barrier. As symptom of a flawed communication system, this barrier confirms a (...) connection to labor unrest and the management's unawareness of its emergence, which would thwart any modes to predict and prevent work disruptions. Contents - Introduction to the Bangladeshi ready-made garment sector - Illustration of the internal communication system of Bangladeshi ready-made garment factories - Display of a communication barrier and its connection to labor unrest Target Groups - Academics in the fields of corporate responsibility and corporate/internal communication - Practitioners in the fields of corporate responsibility, corporate communication, development cooperation and garment industry About the Author Helene Blumer obtained her Master of Science in Business Administration (major in New Business Development) at the University of Applied Sciences HTW Chur. She currently works at the Swiss Institute for Entrepreneurship (SIFE) in the fields of corporate responsibility and business internationalization. (shrink)

This article furnishes a philosophical background for the current debate about responsibility and culpability for war crimes by referring to ideas from three important just war thinkers: Augustine, Francisco de Vitoria, and Michael Walzer. It combines lessons from these three thinkers with perspectives on current problems in the ethics of war, distinguishes between legal culpability, moral culpability, and moral responsibility, and stresses that even lower-ranking soldiers must in many cases assume moral responsibility for their acts, even though they are part (...) of a military hierarchy and act under orders. The questions addressed in this article are arguably among the hardest and most muddled in military ethics and deserve close philosophical analysis and scrutiny. (shrink)

NIMBY (Not In My Backyard) refers to an oppositional attitude from local residents against some risk generating facility that they have been chosen to host either by government or industry. The attitude is claimed to be characteristic of someone who is positive to a facility but who wants someone else to be its host. Since siting cannot be provided if everyone has this attitude, society ends up in a worse situation. The attitude is claimed to be egoistic and irrational. Here (...) it is argued that the NIMBY critique rests on questionable assumptions about the rightness of weighing total benefit against total cost. This weighing-principle will sometimes have to yield so that the rights of individuals can be acknowledged. (shrink)

Public sector adoption of AI techniques in welfare systems recasts historic national data as resource for machine learning. In this paper, we examine how the use of register data for development of predictive models produces new ‘afterlives’ for citizen data. First, we document a Danish research project’s practical efforts to develop an algorithmic decision-support model for social workers to classify children’s risk of maltreatment. Second, we outline the tensions emerging from project members’ negotiations about which datasets to include. Third, we (...) identify three types of afterlives for citizen data in machine learning projects: (1) data afterlives for training and testing the algorithm, acting as ‘ground truth’ for inferring futures, (2) data afterlives for validating the algorithmic model, acting as markers of robustness, and (3) data afterlives for improving the model’s fairness, valuated for reasons of data ethics. We conclude by discussing how, on one hand, these afterlives engender new ethical relations between state and citizens; and how they, on the other hand, also articulate an alternative view on the value of datasets, posing interesting contrasts between machine learning projects developed within the context of the Danish welfare state and mainstream corporate AI discourses of the bigger, the better. (shrink)

Depuis la Renaissance, une série de textes témoignent de l’intérêt des artistes pour l’informe, d’un passage du Traité de la peinture de Léonard de Vinci à Degas, Danse, Dessin de Valéry. Léonard de Vinci, Alexander Cozens ou Paul Valéry proposent des « exercice[s] par l’informe», selon l’expression de Valéry. Il s’agit bien d’« exercice[s] », d’activités répétées pour aiguiser les facultés de l’esprit. Ces exercices s’adressent avant tout aux artistes et plus particulièrement aux dessinateurs et aux peintres ; ils constituent (...) une préparation à la création artistique. Ils n’ont généralement pas pour but d’appréhender l’informe ; c’est pourquoi Valéry emploie la tournure « exercice[s] par l’informe» : travailler l’informe est un moyen, une activité qui a le plus souvent pour fin une œuvre qui manifeste un rapport renouvelé aux formes. Comme les « exercices spirituels » dont Pierre Hadot a montré l’importance dans la philosophie antique, ces exercices reposent sur une pratique plutôt que sur une théorie ; comme eux, ils engagent l’esprit — l’entraînement d’une faculté particulière réclame en fait le concours de plusieurs. Cette pratique, qui n’est jamais définitivement acquise, doit par conséquent être répétée. En effet, chacun de ces exercices possède une fonction critique et la critique doit être reconduite tant que perdure l’habitude ou l’illusion qu’elle combat. La différence essentielle tient à la visée de l’exercice : les pratiques que nous étudierons ne tendent pas à réformer le mode de vie du sujet et ainsi à transformer le sujet lui-même, mais à produire une œuvre. Vinci, Cozens et Valéry proposent des exercices artistiques. Si l’exercice spirituel est « une pratique destinée à opérer un changement radical de l’être », selon l’expression d’Hadot, l’exercice artistique possède sans doute un but plus modeste : il vise à développer les facultés fondamentales pour la création artistique, telles que l’imagination, « les capacités d’invention », selon l’expression de Cozens, ou la sensibilité. Les exercices spirituels tendent à apprendre à vivre, tandis que les exercices artistiques ont pour but d’apprendre à créer. Parmi ceux-ci, les exercices par l’informe se distinguent par leur radicalité. D’abord, ils jouent souvent un rôle liminaire : ils exercent l’esprit et dans certains cas le corps en vue de la première étape de la création artistique, l’invention. Mais surtout, ils exercent des facultés fondamentales pour la création artistique, en particulier dans le domaine des arts visuels, pour lesquels écrivent non seulement Vinci et Cozens mais aussi Valéry : les exercices par l’informe ont pour enjeu non seulement d’apprendre à créer, mais aussi d’apprendre à voir. (shrink)

De Anima A 2, 404a 27=Diels, Vorsokratikev 5th edition 68a 101: ⋯κεῖνοςμ⋯γ⋯ρ ⋯πλ⋯ς ψυχ⋯ν ταὐτ⋯7nu κα⋯ νο⋯ν. τ⋯ γ⋯ρ ⋯ληθ⋯ς εἶναι τ⋯ φαι7nu;⋯7mu;ενον; and a 30–31: οὐ δ⋯ χρ⋯ται τῷς δυν⋯7mu;ει τ7iota;7nu;⋯ τ⋯ν ảλ⋯θειαν, ảλλ⋯ ταὐτ⋯ λγ;ει φυχ⋯ν κα⋯ νο⋯ν.2. Metaph. Г 5, 1009b 12=D.v. 5th ed. 68A 112: ὂλως δ⋯δι⋯ τ⋯ ὐπολαμβ⋯νειν φρ⋯νησιν μ⋯7nu; τ⋯ν αἲσθησιν, τα⋯την δ εἷναι ảλλο⋯ωσιν, τ⋯ φαι7nu;⋯μεν7nu; κατ⋯ τ⋯ν αἷσθησι7nu; ⋯ξ ⋯7nu;⋯γκης ⋯ληθ⋯ς εἶναἰ φασιν.

Inequity has been a hallmark of the COVID-19 pandemic in the United States, especially in the sharply disproportionate impacts among people of color. Recent studies have confirmed that t...

This paper is devoted to Ibn Sinn's text deals with two distinct, though closely related, subjects. First he considers the classification of problems, founded on the logical criteria which are the number and degree of indetermination of the solutions and the number of hypotheses and their possible independence. This classification does not replace the Hellenistic one, which remains relevant insofar as it purports to solve geometrical problems, but complements it and has a different frame of reference, applying principally to algebra, (...) that new born science. Ibn Sinn to bestow more importance on the role played by analysis in the course of the proof, the only role left to synthesis being to check that all implications involved in the course of analysis are in fact equivalences. This method will prove to be productive in algebra too, so much so that some algebraists will explicitly identify algebra with analysis. (shrink)

Η υδροδότηση της κρύπτης-δεξαμενής του Σαραπιείου Α παρέμενε άγνωστη σε μεγάλο βαθμό. Δοκιμαστικές τομές που πραγματοποιήθηκαν σε ανοικτό οχετό κατά μήκος του νότιου τμήματος του ιερού αποκάλυψαν αρχαίο αγωγό που παροχέτευε τα νερά της κατώτερης δεξαμενής του Ινωπού, γειτονικού κτίσματος του Σαραπιείου Α. Ο αγωγός αυτός είχε συνδεθεί με άλλον οχετό που εξερχόταν από την κρύπτη : η υδροδότηση της κρύπτης-δεξαμενής γινόταν επομένως απευθείας από τα νερά του Ινωπού. Γνωρίζουμε εξ άλλου ότι η έναρξη λειτουργίας του Σαραπιείου Α στοίχισε μια (...) δίκη στον ιερέα Απολλώνιο.' Ισως αυτή ακριβώς η σύνδεση, ενός ιδωτικού αγωγού με ένα δημόσιο του Ινωπού, στάθηκε αιτία για να κατηγορηθεί ο ιερέας. (shrink)

ML-HCAs have the potential to significantly change an entire healthcare system. It is not even necessary to presume that this will be disruptive but sufficient to assume that the mere adaptation of...

We develop the concept of ‘aesthetic practices’ to capture the work needed for population data to be disseminated via government data portals. Specifically, we look at the Census Hub of the European Statistical System and the Danish Ministry of Education’s Data Warehouse. These portals form part of open government data initiatives, which we understand as governing technologies. We argue that to function as such, aesthetic practices are required so that data produced at dispersed sites can be brought into relation and (...) projected as populations in forms such as bar charts, heat maps and tables. Two examples of aesthetic practices are analysed based on ethnographic studies we have conducted on the production of data for the Hub and Warehouse: metadata and data cleaning. Metadata enables data to come into relation by containing and accounting for the differences between data. Data cleaning deals with the indeterminacies and absences of data and involves algorithms to determine what values data can obtain so they can be brought into relation. We attend to how both aesthetic practices involve normative decisions that make absent what exceeds them: embodied knowledge that cannot or has not been documented as well as data that cannot meet the forms required of data portals. While these aesthetic practices are necessary to sustain data portals as ‘sites of projection,’ we also bring critical attention to their performative effects for knowing, enacting and governing populations. (shrink)

Trade secret theft is a problem that almost all organizations face. The greatest threat is employee mobility and potential unethical post-employment behavior. This study investigates the role of individual personality traits in judgments about trade secret misappropriation. Our hypotheses were tested in three studies addressing three different situational contexts: current employees, employees about to be laid off, and students who had quit their job. Relationships were estimated with robust regression. The results show that some personality traits predict judgment about another (...) person's trade secret misappropriation, and that the situational context in which individuals formulate their ethical judgment moderates the impact of personality traits on ethical judgment. (shrink)

The sanctuary of Demeter at Vamies (Itanos, East Crete). Topography, architecture and small terracotta figurines The survey conducted on the territory of Itanos has led to the discovery of numerous sites. This paper focuses on a small sanctuary located in the immediate vicinity of the ancient town. The site was cleared of brushwood and intensively surveyed in 1996. This work revealed the foundations of a rectangular building and produced a lot of pottery and terracotta figurines. This paper offers a general (...) presentation of the topography of the site, as well as a comprehensive catalogue and full discussion of the terracotta figurines. The latter offer various hints for the identification of the worshipped deity, probably Demeter, whereas the analysis of their stylistic features provide clues to the origin of these pieces, offering interesting parallels with other cult deposits in Eastern Crete. Finally, they allow examining the notion of Eteocretan identity when applied to material culture. (shrink)

Η στήλη που δημοσιεύεται εδώ ανακαλύφθηκε το 2003 στη Δεξαμενή του Ινωπού στη Δήλο, όπου είχε επαναχρησιμοποιηθεί ως οικοδομικό υλικό, και φέρει το ψήφισμα του Ινωπού. Μπορούμε να δείξουμε, ξαναδιαβάζοντας τους λογαριασμούς των Ιεροποιών, ότι το όνομα Ινωπός αναφέρεται στην ίδια τη Δεξαμενή - η οποία από τυπολογική άποψη είναι μια κρήνη - και όχι στο ρέμα του Ινωπού. Το κείμενο παρουσιάζει άλλωστε μια δυσκολία, καθώς εμπεριέχει αντιφατικές ενδείξεις για τη χρονολόγησή του. Μπορούμε να υποθέσουμε ότι πρόκειται για ένα ελληνιστικό (...) αντίγραφο ενός αρχαιότερου κανονισμού, ο οποίος χρονολογείται στην κλασική εποχή. Στην περίπτωση αυτή πρέπει να δεχθούμε ότι οι πρώτες εργασίες διαμόρφωσης της Δεξαμενής του Ινωπού ανέρχονται σε εποχή παλαιότερη από αυτήν που πιστεύαμε μέχρι σήμερα. (shrink)

Dans son Essai sur l’Exotisme. Une Esthétique du Divers (Notes), Victor Segalen (1878-1919) évoque les arts et l’émergence de la sensation d’exotisme, c’est-à-dire du divers. Il semble que dans cette posture, chaque art apparaisse comme une entité autonome, qui n’a nul besoin d’être comparée à une autre pour exister. L’esthétique du divers pulvériserait le mode comparatif pour privilégier l’altérité, une pensée poétique en archipels dans laquelle les formes artistiques sont des relations imprévisibles, avant d’être peut-être encore des entités pyramidales. L’esthétique (...) du divers et de l’insatisfaction ouvre-t-elle véritablement, dans un monde globalisé, un réseau critique de rapports, de tensions, où toute comparaison serait apparemment vaine? Cependant, à défaut d’être comparés, les différents arts pourraient-ils être traversés par un élément commun? La sensation segalenienne comme principe esthétique voyageur qui traverse tous les arts sans les égaliser fait écho aux attitudes artistiques actuelles. (shrink)

Dix ans avant sa mort, Bernard Teyssèdre dans Arthur Rimbaud et le Foutoir zutique montre avec brio et humour comment l’enquête esthétique, historique, voire anthropologique, sur un sujet scandaleux complète celle menée à bien sur Le Roman de l’Origine (2007) et la vie du fameux tableau de Courbet, abordant avec liberté la question littéraire et celle de l’art. Mêlant avec subtilité le geste littéraire et le goût d’une recherche scientifique exigeante, sa méthode d’interprétation devient alors une œuvre d’art ouverte, vertigineuse. (...) L’exploration de son texte de 776 pages propose de repérer et de commenter la manière dont il conduit l’enquête sur Rimbaud, sur l’ Album zutique, à l’aune de divers contextes et archives. L’errance, le doute, la prudence et l’audace participent de l’immersion dans ce foutoir qui n’a pas livré tous ses secrets. (shrink)

Les potières berbères de Sejnane (Tunisie) produisent depuis toujours des objets domestiques qui sont aussi des objets d’art, de collection, et pas seulement un artisanat. Leur savoir-faire fait partie du patrimoine immatériel de l’Unesco et les artistes, les institutions contemporains sont sensibles à cette pratique ancestrale. Dans cet article, on examine en quoi l’art des potières de Sejnane incarne une poétique, une poïétique, une esthétique qui croisent signes et figurations et interrogent les frontières de l’art, la notion de marge.

Suscités par la reprise massive de la recherche en astronomie au IXe siècle dans le monde islamique et essentiellement à Bagdad, laquelle nécessite des outils mathématiques nouveaux, une floraison de traités, tant astronomiques que mathématiques, voit le jour à cette époque. D'entre les traités mathématiques, un certain nombre est consacré à la ‘‘figure secteur”, c’est-à-dire au théorème dit ‘‘de Ménélaüs” sur la sphère, lequel généralise le théorème dit ‘‘de Ménélaüs” dans le plan. Ce théorème de Ménélaüs sur la sphère, ou (...) règle des six quantités, est, en l’absence du théorème des sinus sur la sphère, lequel ne date que de la deuxième moitié du Xe siècle, le principal outil de l'astronomie sphérique. Le traité de Thābit ibn Qurra sur La figure secteur est le premier de ces traités consacrés au théorème de Ménélaüs, tant dans le plan que sur la sphère, à nous être parvenu; point de départ de tout un courant, il influencera profondément le développement ultérieur de la géométrie sphérique. Ce traité, qui est en fait une épître adressée à un correspondant malheureusement anonyme, présente en outre l'intérêt de montrer que, dans le milieu scientifique de cette époque à Bagdad, beaucoup s'intéressaient à ce théorème, essayaient d'en énoncer d'autres cas de figure et de compléter la démonstration qu'en donne Ptolémée dans l'Almageste. (shrink)