This article introduces some soft computing methods generally used for data analysis and flow pattern detection in fluid dynamics. These techniques decompose the original flow field as an expansion of modes, which can be either orthogonal in time, or in space or in time and space, or they can simply be selected using some sophisticated statistical techniques. The performance of these methods is tested in the turbulent wake of a wall-mounted square cylinder. This highly complex flow is suitable to show (...) the ability of the aforementioned methods to reduce the degrees of freedom of the original data by only retaining the large scales in the flow. The main result is a reduced-order model of the original flow case, based on a low number of modes. A deep discussion is carried out about how to choose the most computationally efficient method to obtain suitable reduced-order models of the flow. The techniques introduced in this article are data-driven methods that could be applied to model any type of non-linear dynamical system, including numerical and experimental databases. (shrink)

Many years after the publication of “A Logical Calculus of the Ideas Immanent in Nervous Activity,” Warren McCulloch gave Walter Pitts credit for contributing his knowledge of modular mathematics to their joint project. In 1941 I presented my notions on the flow of information through ranks of neurons to Rashevsky’s seminar in the Committee on Mathematical Biology of the University of Chicago and met Walter Pitts, who then was about seventeen years old. He was working on a mathematical theory of (...) learning and I was much impressed. He was interested in problems of circularity, how to handle regenerative nervous activity in closed loops....For two years Walter and I worked on these problems whose solution depended upon modular mathematics of which I knew nothing, but Walter did.. In this paper, we will fill in some of the details regarding Pitts’s interest in problems of circularity, regenerative activity in closed loops of neurons, and modular mathematics, and the way in which they relate to “A Logical Calculus.”. (shrink)

Il est encore paradoxal de reconnaître aux livres des Chroniques le statut d'œuvre littéraire. Longtemps considéré comme de « piètre fiabilité » par rapport au récit parallèle des livres de Samuel et des Rois, ces livres apparaissent aussi sans originalité littéraire par rapport notamment à l'art consommé des récits des livres de Samuel. Dans le sillage de l'Art du récit biblique, de Robert Alter, Ph. Abadie tente de faire ressortir la richesse et la variété des procédés d'écriture qui font du (...) livre des Chroniques une œuvre littéraire véritable. Celle-ci tient fondamentalement à un projet global que révèlent et confirment des « unités kérygmatiques » structurantes et l'ordonnancement de grands ensembles selon divers procédés : technique de répétition et système de périodisation chronologique notamment.It is still paradoxical to recognize the statute of literary work for the books of Chronicles. Long time considered as of “poor reliability” in comparison with the parallel history of the books of Samuel and Kings, these books also seem to be without literary originality in comparison with, notably, the consummate art of the narratives in the books of Samuel. In the wake of “The Art of Biblical Narrative” by Robert Alter, Ph. Abadie tries to bring out the richness and the variety of the writing procedures that make the book of Chronicles a truly literary work. It fundamentally holds to a global project that reveals and confirms some “kerygmatic unities,” structuring and ordering great ensembles according to diverse procedures: especially a technique of repetition and system of chronological periodisation. (shrink)

La relation entre la philosophie et la mystique forme une question " à la limite ", que la fatalité a le plus souvent déclinée en une suite d'oppositions frontales : entre le rationnel et l'émotionnel, le logique et le pathologique, le discours et l'indicible... Depuis quelques années cependant, plusieurs motifs portent à reconsidérer cette relation singulière. Une somme d'informations sans précédent sur les diverses traditions mystiques, sur leurs variabilités historiques et géographiques est désormais accessible. En outre, la mystique est devenue (...) un objet œcuménique et interreligieux de premier plan qui invite à reposer la question de l'essence du religieux dans la traversée herméneutique des différences confessionnelles. Enfin, on enregistre une forte demande de redressement spéculatif face à l'essor actuel des sectes et au développement des syncrétismes religieux. Mais le philosophe est-il qualifié pour comprendre la mystique? A quelles conditions? De son côté, le mystique n'a-t-il point tendance à cacher sa dette à l'égard de l'expérience de la pensée, voire des concepts philosophiques? Plus profondément encore, faut-il lier la mystique au seul " religieux "? La philosophie n'est-elle pas un exercice spirituel, une expérience? C'est justement par cette entrée " expérientielle " dans la question que le présent ouvrage trouve son originalité. Grâce aux contributions de spécialistes qu'il réunit, il répond à trois tâches précises : redéfinir le concept d'expérience dès lors qu'il est assigné à la philosophie et au religieux ; évoquer dans une perspective critique les grands figures historiques, témoins et acteurs de l'intersection des deux champs, philosophique et mystique ; mettre à l'épreuve, selon une perspective systématique et au voisinage des œuvres majeures de Simone Weil, Franz Rosenzweig, Emmanuel Lévinas, Éric Weil et Maurice Blondel, les différentes théorisations d'une relation finalement plus présente qu'on ne le dit, dans la structuration du pensable contemporain. (shrink)

We extend Morley's Theorem to show that if a theory is κ-p-categorical for some uncountable cardinal κ, it is uncountably categorical. We then discuss ω-p-categoricity and provide examples to show that similar extensions for the Baldwin-Lachlan and Lachlan Theorems are not possible.

William Alston’s argument against the deontological conception of epistemic justification is a classic—and much debated—piece of contemporary epistemology. At the heart of Alston’s argument, however, lies a very simple mistake which, surprisingly, appears to have gone unnoticed in the vast literature now devoted to the argument. After having shown why some of the standard responses to Alston’s argument don’t work, we elucidate the mistake and offer a hypothesis as to why it has escaped attention.

The paper develops an objection to the extensional model of time consciousness—the view that temporally extended events or processes, and their temporal properties, can be directly perceived as such. Importantly, following James, advocates of the extensional model typically insist that whole experiences of temporal relations between non-simultaneous events are distinct from mere successions of their temporal parts. This means, presumably, that there ought to be some feature(s) differentiating the former from the latter. I try to show why the extensional models (...) offers no credible ground for positing such a difference. (shrink)

On échange des cadeaux en fin d'année par convention. Ecrire de gauche à droite, rouler à droite ou encore s'arrêter lorsque le feu est rouge sont des conventions. Les conventions sont également mobilisées pour coordonner les individus d'un même groupe de travail, de façon à déterminer le moment et la durée de la pause, mais aussi leur niveau d'effort, comme " ne faire que x pièces à l'heure ", voire la façon dont ils sont rémunérés. Les conventions jouent ainsi un (...) rôle important dans la coordination économique. La notion de convention est un thème d'étude nouveau pour l'économie. Elle fait aujourd'hui l'objet de très nombreuses recherches. Cet ouvrage ambitionne de clarifier tous les usages du terme " convention " en économie, depuis les travaux qui s'appuient sur la philosophie du langage jusqu'aux thèses développées par " l'Economie des conventions ", en passant par la théorie des jeux. Cet ouvrage est le fruit d'un travail collectif qui a associé et mobilisé une équipe de chercheurs an sein de FORUM. (shrink)

Several disputes about the nature of experience operate under the assumption that experiences have parts, including temporal parts. There's the widely held view, when it comes to temporal experiences, that we should follow James' exhortation that such experiences aren't mere successions of their temporal parts, but something more. And there's the question of whether it is the parts of experiences which determine whole experiences and the properties they have, or whether the determination goes instead from the whole to the parts, (...) as holists have it. But what are parts, or temporal parts, of experiences exactly—what does it mean to say that an experience is “part” of another? Are the participants in those disputes talking about the same thing—is there a univocal notion of “experiential part” available? Are there different kinds of experiential parts? And if there are, is there a systematic way of carving them out? More importantly, how should we conceive of the temporal parts of experiences, and how can we establish that experiences really do have temporal parts, against those who reject the notion? (shrink)

We extend Shelah's first many model result to show that an unstable theory has 2 κ many non-permutation group isomorphic models of size κ, where κ is an uncountable regular cardinal.

We extend Shelah's first many model result to show that an unstable theory has 2κmany non-permutation group isomorphic models of size κ, where κ is an uncountable regular cardinal.

This article examines two statements that Hopkins made on Newman as a poet and as a critic of poetry. Hopkins carefully analyzed the literary genealogy of Newman’s poetry, indifferently assessed its general achievement, and specifically criticized one point in Newman’s judgment of a poet. Hopkins’ statements, which came late in his own career, give no hint of a process of change in his response to Newman’s poetry. But Newman’s numerous remarks, gleaned from random sources over forty years, demonstrate change in (...) his theory of poetry. (shrink)

The true nature of space and time has been a topic of natural philosophy, passed down since the presocratic era. In modern times reflection has particularly been inspired by the physical theories of Newton and Einstein and, more recently, by the quest for a theory of quantum gravity. In this paper we want to specify the idea that material systems and their spatio-temporal distances emerge from quantum-events. We will show a mechanism, by which quantum-events induce a metric field between material (...) systems, which is governed by Einstein's equation including a cosmological constant. (shrink)

We propose two alternatives to Xu’s axiomatization of Chellas’s STIT. The first one simplifies its presentation, and also provides an alternative axiomatization of the deliberative STIT. The second one starts from the idea that the historic necessity operator can be defined as an abbreviation of operators of agency, and can thus be eliminated from the logic of Chellas’s STIT. The second axiomatization also allows us to establish that the problem of deciding the satisfiability of a STIT formula without temporal operators (...) is NP-complete in the single-agent case, and is NEXPTIME-complete in the multiagent case, both for the deliberative and Chellas’s STIT. (shrink)

Nucléaire, clonage, OGM, sang contaminé : sans cesse invoqué en matiére d'environnement, de santé, d'alimentation, le principe de précaution est l'objet de multiples controverses. De quoi s'agit-il? Trop de précaution ne risque-t-il pas de bloquer des avancées scientifiques ou techniques cruciales pour l'avenir? Une clarification était nécessaire. Car l'important aujourd'hui est de donner à ce principe un contenu positif, c'est-à -dire une définition assortie d'un mode d'emploi qui puisse être compris de tous et servir à tous. Philippe Kourilsky est directeur (...) général de l'Institut Pasteur, professeur au Collége de France et membre de l'Académie des sciences. Il est notamment l'auteur des Artisans de l'hérédité et de La Science en partage. (shrink)

The 1992 incorporation of an article by referendum in the SwissConstitution mandating that the federal government issue regulations onthe use of genetic material that take into account the dignity ofnonhuman organism raises philosophical questions about how we shouldunderstand what is meant by ``the dignity of nonhuman animals,'' andabout what sort of moral demands arise from recognizing this dignitywith respect to their genetic engineering. The first step in determiningwhat is meant is to clarify the difference between dignity when appliedto humans and (...) when applied to nonhumans. Several conceptions of humandignity should be rejected in favor of a fourth conception: the rightnot to be degraded. This right implies that those who have it have thecognitive capacities that are prerequisite for self-respect. In the caseof nonhuman organisms that lack this capacity, respecting their dignityrequires the recognition that their inherent value, which is tied totheir abilities to pursue their own good, be respected. This value isnot absolute, as it is in the case of humans, so it does not prohibitbreeding manipulations that make organisms more useful to humans. But itdoes restrict morally how sentient animals can be used. In regard togenetic engineering, this conception requires that animals be allowedthe uninhibited development of species specific functions, a positionshared by Holland and Attfield, as opposed to the Original Purposeconception proposed by Fox and the Integrity of the Genetic Make-upposition proposed by Rolston. The inherent value conception of dignity,as here defended, is what is meant in the Swiss Constitution article. (shrink)

Barnett and Block (Journal of Business Ethics, 2009 ) attack the heart of modern banking by claiming that the practice of borrowing short and lending long is illicit. While their claim of illegitimacy concerning fractional reserve banking can be defended, their justification lacks substance. Their claim is herein strengthened by a legal analysis of deposits and loans based on Huerta de Soto (Money, Bank Credit and Economic Cycles, 2006 ). A combined legal and economic analysis shows that while lending deposits (...) can be regarded as illicit, the maturity mismatching of loans is legitimate contrary to Barnett and Block’s claim. No over-issuance of property rights is involved with this practice once the distinction between present and future goods is taken into account. However, while the practice is not illicit per se , it is greatly assisted and developed through the presence of a fractional reserve banking system, and can sometimes breed detrimental effects. (shrink)

How ethical have recent banking practices been? We answer this question via an economic analysis. We assess the two dominant practices of the modern banking system – fractional reserves and maturity transformation – by gauging the respective rights of the relevant parties. By distinguishing the legal and economic differences between deposit and loan contracts, we determine that the practice of maturity transformation (in its various guises) is not only ethical but also serves a positive social function. The foundation of the (...) modern banking system – the holding of fractional reserves against deposits – is, however, problematic from economic, legal and ethical perspectives. Starting from a microanalysis of money's function, a reassessment of the current laws concerning the practice is encouraged, with the aim not only to rectify economic irregularities but also to realign depositors' rights with the obligations of the banking sector. (shrink)

How ethical have recent banking practices been? We answer this question via an economic analysis. We assess the two dominant practices of the modern banking system – fractional reserves and maturity transformation – by gauging the respective rights of the relevant parties. By distinguishing the legal and economic differences between deposit and loan contracts, we determine that the practice of maturity transformation (in its various guises) is not only ethical but also serves a positive social function. The foundation of the (...) modern banking system – the holding of fractional reserves against deposits – is, however, problematic from economic, legal and ethical perspectives. Starting from a microanalysis of money's function, a reassessment of the current laws concerning the practice is encouraged, with the aim not only to rectify economic irregularities but also to realign depositors' rights with the obligations of the banking sector. (shrink)

Farabi (ob 950), philosophe persan originaire des confins des mondes persan et turc (Transoxiane), vient s'établir à Bagdad vers la fin du IXe siècle. Il s'y convertit à la philosophie comme on entre en religion. Il quitte Bagdad en 942 pour s'établir la même année à Damas où il meurt huit ans plus tard. C'est là qu'il met le point final au Régime politique qui est son testament philosophique. Ce traité condense toute sa compréhension de Platon, d'Aristote et de la (...) tradition philosophique tardo-antique. Il y livre en outre la clé d'interprétation de son oeuvre la plus fameuse, La Cité vertueuse, dont le Régime politique approfondit les thèmes centraux. On y découvre deux aspects complémentaires de la politique telle qu'il la concevait. Tout d'abord, la politique, pour être philosophique, se doit de faire de la métaphysique son infrastructure. Il faut partir d'une conception définie du monde et de ses principes pour savoir que la destination de l'homme passe nécessairement par la cité. De plus, la politique comme science a une finalité pratique : critiquer jusque dans leurs fondements les régimes et les religions corrompus de son époque. Le traité est à cet égard un document unique dans l'histoire de la falsafa : un philosophe arabophone adresse à la postérité son jugement sur la civilisation arabo-islamique des IXe Xe siècles. (shrink)

This book offers a phenomenological conception of experiential justification that seeks to clarify why certain experiences are a source of immediate justification and what role experiences play in gaining (scientific) knowledge. Based on the author's account of experiential justification, this book exemplifies how a phenomenological experience-first epistemology can epistemically ground the individual sciences. More precisely, it delivers a comprehensive picture of how we get from epistemology to the foundations of mathematics and physics. The book is unique as it utilizes methods (...) and insights from the phenomenological tradition in order to make progress in current analytic epistemology. It serves as a starting point for re-evaluating the relevance of Husserlian phenomenology to current analytic epistemology and making an important step towards paving the way for future mutually beneficial discussions. This is achieved by exemplifying how current debates can benefit from ideas, insights, and methods we find in the phenomenological tradition. (shrink)

Epistemic logics are essential to the design of logical systems that capture elements of reasoning about knowledge. In this paper, we study the computability of unifiability and the unification types in several epistemic logics.

This is a study that investigated the extent of use of the three principles of ethics – utility, morality, and justice – in managerial ethical decision making, in addition to the personal attitude towards them. It involved undergraduate and graduate business students (total N=163) from the Olayan School of Business in the American University of Beirut, Lebanon. Two kinds of measurements were done: self assessment, and testing with the Saschkin’ s Managerial Value Profile (1997). It showed that morality was the (...) overriding ethical principle used, especially in the graduate group (professionals). Business students still believed in the justice system despite the weakness of the country’s law. Utility was the least used, although males were found to be more utilitarian than females. Finally there was no relation between personal attitudes toward the three ethical principles, and the intentional behavior when faced with ethical dilemmas. The findings were discussed and recommendations were given. (shrink)

Conceptualist accounts of the representational content of perceptual experiences have it that a subject _S_ can experience no object, property, relation, etc., unless _S_ "i# possesses and "ii# exercises concepts for such object, property, or relation. Perceptual experiences, on such a view, represent the world in a way that is conceptual.

La philosophie politique de Hobbes acquiert sa pleine validité grâce à la catégorie de la représentation qui apparaît dans le Léviathan. L'ouvrage montre pourquoi il faut saisir le projet de Hobbes dans sa pure radicalité : reconfigurer les conditions ontologiques de toute communauté humaine en substituant le schème de la représentation à celui de l'incarnation. Par là, Hobbes clôt l'époque du corps politique pour ouvrir celle de la personne de l'État.

Walter Benjamin (1892-1940) à travers son itinéraire semé d'embûches, a dû affronter l'arrivée au pouvoir des nazis. Amené à sillonner l'Europe il développe une activité de critique littéraire et une philosophie de l'histoire, notamment dans ses ultimes « thèses » de 1940. Ce testament philosophique est influencé par le messianisme juif et le marxisme. Décrit comme sentinelle messianique, l'œuvre de Walter Benjamin se déploie aux confins de la sociologie, de l'esthétique et de la théologie. Sa philosophie de l'histoire contraste avec (...) celle de Nietzsche, mais le rapproche de Simone Weil. Analyste privilégié des tourments de l'Europe, il participera indirectement à l'Ecole de Francfort. (shrink)

Petites absences, décrochages, distractions : notre relation au monde visible est ponctuée de ces éclipses infimes. Face à ce qui réclame sans cesse notre attention - écrans d'ordinateur ou de télévision, signaux, spectacles -, nous vivons dans l'intermittence du regard et de l'écoute. Confrontés aux histoires les plus intenses, aux images les plus fortes, nous ne cessons de perdre le fil de ce qui semble essentiel. Que manifestent ces brèves pannes du sens? Une pesanteur et une aliénation? Ou une insaisissable (...) liberté Ce sont ces alternances de présence et d'absence, de plein et de vide, de net et de flou, que tente de recueillir ce livre, comme un voyage à la fois drôle et grave dans les minuscules fuites de la perception. (shrink)

Ce livre ne présente pas la philosophie de Gilles Deleuze, ni encore moins il ne la résume. Il s'en sert en l'appliquant à des problèmes spécifiques politiques et esthétiques, pour en montrer concrètement, sur des exemples précis, des cas, la pertinence et la fécondité. Ainsi à travers le masochisme de la Vénus à la fourrure, la peinture du Lorrain, l'espace public démocratique du contrat social, et l'étrange athéisme de Sade, on peut voir la force de révélation que détiennent les concepts (...) deleuziens d'espace lisse et de lignes de fuite. Mais en même temps qu'on verra jouer concrètement ces concepts, leur parenté très grande avec ceux de Lacan apparaîtra clairement. Le travail d'analyse, la clinique, quand il est concret et précis, dissout les gros concepts et, au-delà des oppositions d'opinion massives, ouvre et trace des lignes de sens et des perspectives de lecture radicalement nouvelles, où les vieux antagonismes deviennent désuets. D'où la richesse atypique de la philosophie deleuzienne."--Page 4 of cover. (shrink)

"Die vorliegende Studie versucht aus problemgeschichtlicher Perspektive einige Aspekte Wang Biíschen Denkens vorzustellen, insofern sie in Kontinuität zur song-typischen Abstraktionsleistung des sogenannten Neokonfuzianismus gesehen werden können. Wang Bi (226-249) gilt als einer der prominentesten Vertreter der xuanxue, einer wei-jin-zeitlichen intellektuellen Strömung ausgeprägt spekulativen Charakters. Bereits zu Lebzeiten wurde er als einer der brillantesten Köpfe und als maßgeblicher Kommentator des Yijing (Buch der Wandlungen) und des Daodejing gefeiert. Diese Kommentare wie auch die von ihm verfaßten Auslegungen jener Werke gelangten zu beträchtlicher (...) Fernwirkung innerhalb ideengeschichtlicher Entwicklungen Chinas. Von dem unverkennbar innovativen Argumentationstyp, der die Texte des Wang Bi auszeichnet, sollten entscheidende Impulse für den kulturtraditionellen Diskurs folgender Jahrhunderte ausgehen. Mit Blick auf die songkonfuzianische Konsequenz, die Neubegründungen des Paradigmas einer normativen Kulturtradition, ist die Initialfunktion wei-jin-zeitlichen Denkens kaum zu überschätzen."--Publisher's website. (shrink)

Aborde la question de l'image chrétienne face à la révolution de la modernité, en montrant comment la nature spécifique de l'image conduit à l'exigence d'un discernement en engageant le spectateur à dépasser ses propres limites. Démontre également que le modernisme de la représentation iconographique n'a rien perdu de son actualité.

Public announcement logic is an extension of multiagent epistemic logic with dynamic operators to model the informational consequences of announcements to the entire group of agents. We propose an extension of public announcement logic with a dynamic modal operator that expresses what is true after any announcement: after which , does it hold that Kφ? We give various semantic results and show completeness for a Hilbert-style axiomatization of this logic. There is a natural generalization to a logic for arbitrary events.

Musical performance requires the ability to master a complex integration of highly specialized motor, cognitive and perceptual skills developed over years of practice. It often means also being able to deal with a large amount of pressure within dynamic environments. Consequently, many musicians suffer from health-related problems and have a large number of physical and psychological complaints. Research has shown that making music can present challenges for musicians’ wellbeing. Therefore, our research aims to evaluate and analyze the wellbeing of two (...) distinct groups of respondents, college music students compared with amateur musicians in the French-speaking part of Switzerland, this second group serving as our comparison group. This article presents the results of a sample of 126 musicians (mean age ± SD = 22.4 ± 4.5 years, 71 male). The wellbeing was assessed through the World Health Organization Quality of Life-BREF questionnaire evaluating two general measures, Quality of Life and General health, and four specific dimensions, Physical health, Psychological health, Social relationships and Environment. The respondents’ Quality of Life was high on each measure: median scores were higher than 4 for the first two measures and higher than 70 for the four specific dimensions. Among the dimensions, respondents had the highest mean score for Social relationships and Physical health (74.0 and 73.8, respectively) and, finally, on Psychological health (70.3). Our overview of musicians’ wellbeing in Western Switzerland underlines the importance of helping musicians to be aware of their health in order to take care of themselves. This research offers an important insight into musicians’ health and point out the importance of involving different actors (teachers, administrators or support staff) to promote their wellbeing and empower musicians. (shrink)

Temporally extended experiences, experiential holists have it, are not reducible to successions of their temporal parts because some whole experiences determine their parts (in some way). This paper suggests, first, that some forms of experiential holism are in fact consistent with the rival atomist view (that experiences are successions of their parts) and, second, that the main reasons advanced for experiential holism are compatible with atomism too. The paper then looks at how holistic determination of its parts by a whole (...) experience might take place in time, arguing that it is either inconsistent or undermines widespread assumptions regarding the mechanisms underlying experiences. (shrink)

The focus of this paper are the ethical, legal and social challenges for ensuring the responsible use of “big brain data”—the recording, collection and analysis of individuals’ brain data on a large scale with clinical and consumer-directed neurotechnological devices. First, I highlight the benefits of big data and machine learning analytics in neuroscience for basic and translational research. Then, I describe some of the technological, social and psychological barriers for securing brain data from unwarranted access. In this context, I then (...) examine ways in which safeguards at the hardware and software level, as well as increasing “data literacy” in society, may enhance the security of neurotechnological devices and protect the privacy of personal brain data. Regarding ethical and legal ramifications of big brain data, I first discuss effects on the autonomy, the sense of agency and authenticity, as well as the self that may result from the interaction between users and intelligent, particularly closed-loop, neurotechnological devices. I then discuss the impact of the “datafication” in basic and clinical neuroscience research on the just distribution of resources and access to these transformative technologies. In the legal realm, I examine possible legal consequences that arises from the increasing abilities to decode brain states and their corresponding subjective phenomenological experiences on the hitherto inaccessible privacy of these information. Finally, I discuss the implications of big brain data for national and international regulatory policies and models of good data governance. (shrink)

Using photographs and testimonials, we will analyze details of the “miracle of the spinning sun” on October 13, 1917, at solar noon near Fatima. The phenomenon predicted ahead of time, occurred as the clouds cleared on what began as a rainy day. Various explanations have been presented but do not stand up to a comparative analysis of eyewitnesses, weather data, and photographs. This article aims to bring clarity to this event through the analysis of certified photographs and testimonies comparing them (...) to official meteorological and astronomical data. Our study confirms key points of the testimonials while focusing on objective data. The shadows and reflections reveal two soft light sources emerging from a rather dark background: one seen as a “pale sun”, and another overhead, fuzzy and as softly bright. The latter, likely being caused by a clear cloud, blurred the shadows of the weak “sun”. Strangely, the portions of clothing exposed to this “sun” dried quickly. This warm source, uncannily moonlike, was also able to cast distinct shadows on sloping surfaces and under objects. Eventually, these shadows will help us to estimate the height of the “sun” at ~30°, lower than the expected 42°. Therefore, the directly observed source could not have been the sun, and most probably not any physiological, psychological, or meteorological effect. (shrink)