Neural network models of memory are notorious for catastrophic interference: Old items are forgotten as new items are memorized (French, 1999; McCloskey & Cohen, 1989). While working memory (WM) in human adults shows severe capacity limitations, these capacity limitations do not reflect neural network style catastrophic interference. However, our ability to quickly apprehend the numerosity of small sets of objects (i.e., subitizing) does show catastrophic capacity limitations, and this subitizing capacity and WM might reflect a common capacity. Accordingly, computational investigations (...) (Knops, Piazza, Sengupta, Eger & Melcher, 2014; Sengupta, Surampudi & Melcher, 2014) suggest that mutual inhibition among neurons can explain both kinds of capacity limitations as well as why our ability to estimate the numerosity of larger sets is limited according to a Weber ratio signature. Based on simulations with a saliency map‐like network and mathematical proofs, we provide three results. First, mutual inhibition among neurons leads to catastrophic interference when items are presented simultaneously. The network can remember a limited number of items, but when more items are presented, the network forgets all of them. Second, if memory items are presented sequentially rather than simultaneously, the network remembers the most recent items rather than forgetting all of them. Hence, the tendency in WM tasks to sequentially attend even to simultaneously presented items might not only reflect attentional limitations, but also an adaptive strategy to avoid catastrophic interference. Third, the mean activation level in the network can be used to estimate the number of items in small sets, but it does not accurately reflect the number of items in larger sets. Rather, we suggest that the Weber ratio signature of large number discrimination emerges naturally from the interaction between the limited precision of a numeric estimation system and a multiplicative gain control mechanism. (shrink)

Is formal simplicity a guide to learning in humans, as simplicity is said to be a guide to the acceptability of theories in science? Does simplicity determine the difficulty of various learning tasks? I argue that, similarly to how scientists sometimes preferred complex theories when this facilitated calculations, results from perception, learning and reasoning suggest that formal complexity is generally unrelated to what is easy to learn and process by humans, and depends on assumptions about available representational and processing primitives. (...) “Simpler” hypotheses are preferred only when they are also easier to process. Historically, “simpler”, easier‐to‐process, scientific theories might also be preferred if they are transmitted preferentially. Empirically viable complexity measures should build on the representational and processing primitives of actual learners, even if explanations of their behaviour become formally more complex. (shrink)

Ansgar Lyssy,Christian Leduc | : Le principe de moindre action fut découvert dans le domaine de l’optique et dans celui de la mathématisation du corps en mouvement à l’intérieur d’une structure de forces. Aussi bien Euler que Maupertuis prennent appui sur une compréhension métaphysique de la nature pour justifier l’extension de ce principe à un principe général de physique. Dans le présent article, je soutiens que les deux croient que la nature elle-même ne saurait employer de moyens inutiles pour (...) ses fins, et est donc économique. Le principe de moindre action peut être compris comme une tentative d’intégrer l’idée métaphysique d’une « économie de la nature » à l’intérieur du domaine de la science. | : The principle of least action was discovered in the realm of optics and in the mathematical properties of a body moving within a framework of forces. Both Euler and Maupertuis rely on a metaphysical understanding of nature to justify the expansion of this principle into a general principle of physics. In this paper, I argue that both believe that nature itself uses no unnecessary means for its ends, thus is economical. The principle of least action can be understood as the attempt to integrate this metaphysical idea of an “economy of nature” into the realm of science. (shrink)

At the start of the 20th century the question of whether life could be explained in purely me- chanical terms was as hotly debated as the mind-body problem is today. Two factions opposed each other: Biological mechanists claimed that the properties characteristic of living organisms could be ex- plained mechanistically, in the way the behavior of a clock can be explained by the properties and the arrangement of its cogs, springs, and weights. Substantial vitalists, on the other hand, maintained that (...) the explanation envisaged by the mechanists was impossible and that one had to postulate a special nonphysical substance in order to explain life. (shrink)

Zu Beginn des 20. Jahrhunderts war die Frage, ob Leben rein mechanisch erklärt werden könne, noch genau so heiß umstritten wie das Leib-Seele- Problem heute. Zwei Parteien standen sich unversöhnlich gegenüber. Auf der einen Seite die Biologischen Mechanisten mit der Auffassung, daß die für Lebewesen charakteristischen Eigenschaften (Stoffwechsel, Fortpflan- zung, Wahrnehmung, zielgerichtetes Verhalten, Morphogenese) genauso mechanisch erklärt werden können wie das Verhalten einer Uhr, das sich mit physikalischer Zwangsläufigkeit aus den Eigenschaften und der Anord- nung ihrer Zahnräder, Federn und Gewichte (...) ergibt. Auf der anderen Seite die Substanz-Vitalisten, die die entgegengesetzte Meinung vertraten, Leben könne nur durch die Annahme einer nichtphysischen Substanz erklärt wer- den – einer Entelechie oder eines élan vital. Als Broad in den frühen zwan- ziger Jahren seine Überlegungen zum Begriff der Emergenz entwickelte, verfolgte er unter anderem das Ziel, Raum für eine dritte Position zwischen diesen beiden Extremen zu schaffen – eine Position, die er Emergenten Vi- talismus nannte. (shrink)

Können Gründe Ursachen unseres Handelns sein? Wenn man Gründe als Paare von Überzeugungen und Wünschen auffasst, spricht viel dafür, dass das so ist. Aber wie ist es, wenn man Gründe als Tatsachen in der Welt auffasst, die dafür sprechen, eine bestimmte Handlung auszuführen? Manche sagen, dass es zumindest für freie Handlungen keine hinreichenden Ursachen geben kann. Egal wie die Welt beschaffen ist, egal zu welchen Ergebnissen die Überlegungen einer Handelnden geführt haben, sie kann sich immer so und auch anders entscheiden. (...) Hinter dieser Auffassung steht eine Auffassung Handelns, der zufolge dieses Handeln darin besteht, dass die Handelnde akteurskausal bestimmte Bewegungen verursacht. Diese Auffassung ist unhaltbar. Handlungen beruhen auf Entscheidungen, die oft auf Prozesse des Überlegens zurückgehen, die ihrerseits auch durch Tatsachen in der Welt angestoßen werden, die für die Ausführung einer Handlung sprechen. Zumindest de facto kommt es oft vor, dass diese Prozesse mit kausaler Notwendigkeit zu einer bestimmten Entscheidung und damit auch zu einer bestimmten Handlung führen. D. h., zumindest in manchen Fällen sind auch Tatsachen, die für die Ausführung einer Handlung sprechen, – nicht allein, aber zusammen mit anderen Umständen – Ursachen von Handlungen. (shrink)

In der Philosophie ist man sich heute weitgehend einig, daß das, was man gemeinhin unter dem Stichwort ‘Bewußtsein’ zusammenfaßt, eine Reihe sehr unterschiedlicher Aspekte beinhaltet. Bewußtsein hat zunächst einmal etwas mit Selbstwissen zu tun, d.h. mit der Fähigkeit mancher Wesen, nicht nur ihre Um- welt, sondern auch sich selbst, ihre eigenen Zustände und Handlungen zu reprä- sentieren. Die hier einschlägigen Stichworte heißen deshalb ‘Metarepräsenta- tion’2 und ‘Selbstmodell’. Dabei ist das zweite Stichwort letztlich treffender, da die Repräsentationen der Umwelt und der (...) eigenen Zustände und Handlungen nicht unverbunden nebeneinander stehen, sondern so miteinander verknüpft sein sollten, daß eine Repräsentation des Wesens selbst in seiner Umwelt ent- steht. Nur auf diese Weise kann der Zweck dieser Art von Repräsentationen erreicht werden: die Überwachung und Steuerung der eigenen Handlungen (‘self-monitoring’). (shrink)

Depuis maintenant plusieurs années, le lecteur francophone encourt une dette de gratitude envers Gérard Sondag pour des traductions et des présentations originales de textes de Duns Scot. Le présent ouvrage nous fournit une introduction précieuse à la nature de la théologie selon Scot. Le texte traduit est le Prologue de la Lectura en quatre questions qui traitent de la nécessité pour l’homme d’une doctrine révélée sur Dieu, du sujet de la théologie, du statut scientifique de la théologie, et du caractère (...) «pratique» de la théologie. La traduction est accompagnée d’une quantité généreuse de notes et elle est précédée d’un «Commentaire continu» par Gérard Sondag où transparaît un contrôle impressionnant de toute l’œuvre du Subtil. Une note d’édition introduit le lecteur dans les problèmes de traduction que rencontre le vulgarisateur de Scot aujourd’hui et qui sont dus au caractère hyperformel de sa pensée. On peut signaler la note éclairante sur la polysémie du mot necessarium chez Scot. (shrink)

The transmission of Greek learning to the Arabic-speaking world paved the way to the rise of Arabic philosophy. This volume offers a deep and multifarious survey of transmission of Greek philosophy through the schools of late Antiquity to the Syriac-speaking and Arabic-speaking worlds.

Everything we do relies on causation. We eat and drink because this causes us to stay alive. Courts tell us who causes crimes, criminology tell us what causes people to commit them. D.H. Mellor shows us that to understand the world and our lives we must understand causation. _The Facts of Causation_, now available in paperback, is essential reading for students and for anyone interested in reading one of the ground-breaking theories in metaphysics. We cannot understand the world and our (...) place in it without understanding causation. Yet a complete account of the nature and implications of causation does not exist. D.H Mellor's new book is that account. (shrink)

Everything we do relies on causation. We eat and drink because this causes us to stay alive. Courts tell us who causes crimes, criminology tell us what causes people to commit them. D.H. Mellor shows us that to understand the world and our lives we must understand causation. _The Facts of Causation_, now available in paperback, is essential reading for students and for anyone interested in reading one of the ground-breaking theories in metaphysics. We cannot understand the world and our (...) place in it without understanding causation. Yet a complete account of the nature and implications of causation does not exist. D.H Mellor's new book is that account. (shrink)

'Why did the window break when it was hit by the stone? Because the window is brittle and the stone is hard; hardness and brittleness are powers, dispositional properties or dispositions.' Dispositions are essential to our understanding of the world. This book is a record of the debate on the nature of dispositions between three distinguished philosophers - D. M. Armstrong, C. B. Martin and U. T. Place - who have been thinking about dispositions all their working lives. Their distinctive (...) accounts cover many of the issues surrounding dispositions such as the nature of mind, matter, universals, existence, laws of nature and causation. Dispositions illuminates this central topic in analytic philosophy and at the same time highlights deeper concerns of metaphysics. (shrink)

This paper argues that the concept and role of ‘institutional racism’ in contemporary discussions of race should be reconsidered. It starts by distinguishing between ‘intrinsic institutional racism’, which holds that institutions are racist in virtue of their constitutive features, and ‘extrinsic institutional racism’, which holds that institutions are racist in virtue of their negative effects. It accepts intrinsic institutional racism, but argues that a ‘disparate impact’ conception of extrinsic conception faces a number of objections, the most serious being that it (...) has no plausible account of what it is that makes extrinsically racist institutions racist. It also argues that claims about the explanatory indispensability of institutional racism are overstated (individual racism is at least as important), critiques structural approaches to racial inequality, and suggests that there is reason to doubt whether institutional reform can provide us with all that morality may require in the racial domain. (shrink)

Objective—To determine the prevalence of, and attitudes towards, observed and personal research misconduct among newly appointed medical consultants. Design—Questionnaire study.Setting—Mersey region, United Kingdom.Participants—Medical consultants appointed between Jan 1995 and Jan 2000 in seven different hospital trusts (from lists provided by each hospital's personnel department). Main outcome measures—Reported observed misconduct, reported past personal misconduct and reported possible future misconduct.Results—One hundred and ninety-four replies were received (a response rate of 63.6%); 55.7% of respondents had observed some form of research misconduct; 5.7% of (...) respondents admitted to past personal misconduct; 18% of respondents were either willing to commit or unsure about possible future research misconduct. Only 17% of the respondents reported having received any training in research ethics. Anaesthetists reported a lower incidence of observed research misconduct (33.3%) than the rest of the respondents (61.5%) (p<0.05). Conclusion—There is a higher prevalence of observed and possible future misconduct among newly appointed consultants in the UK than in the comparable study of biomedical trainees in California. Although there is a need for more extensive studies, this survey suggests that there is a real and potential problem of research misconduct in the UK. (shrink)

It was proposed that the data from Monte Carlo statistical investigations be subjected to analysis of variance methods rather than the conventional techniques of tabling, graphing, and inspecting the data. Two examples in which analysis of variance methods were applied to published Monte Carlo studies were presented. It was suggested that balanced factorial designs should be used whenever possible in Monte Carlo studies so that analysis of variance methods would be directly applicable. Finally, three advantages of analysis of variance methods (...) over conventional techniques were described and analysis of variance methods were contrasted with a possible alternative analytical method, multiple regression analysis. (shrink)

This is Part 1 of a paper on fibred semantics and combination of logics. It aims to present a methodology for combining arbitrary logical systems L i , i ∈ I, to form a new system L I . The methodology `fibres' the semantics K i of L i into a semantics for L I , and `weaves' the proof theory (axiomatics) of L i into a proof system of L I . There are various ways of doing this, we (...) distinguish by different names such as `fibring', `dovetailing' etc, yielding different systems, denoted by L F I , L D I etc. Once the logics are `weaved', further `interaction' axioms can be geometrically motivated and added, and then systematically studied. The methodology is general and is applied to modal and intuitionistic logics as well as to general algebraic logics. We obtain general results on bulk, in the sense that we develop standard combining techniques and refinements which can be applied to any family of initial logics to obtain further combined logics. The main results of this paper is a construction for combining arbitrary, (possibly not normal) modal or intermediate logics, each complete for a class of (not necessarily frame) Kripke models. We show transfer of recursive axiomatisability, decidability and finite model property. Some results on combining logics (normal modal extensions of K) have recently been introduced by Kracht and Wolter, Goranko and Passy and by Fine and Schurz as well as a multitude of special combined systems existing in the literature of the past 20-30 years. We hope our methodology will help organise the field systematically. (shrink)

Purpose. The research is devoted to the analysis of the urgent problem of the information society: the overload of a person with information and, as a result, the impossibility of adequate formation and development of the personality; as well as the problem of "digitization" of human existence and the formation of a new reality of dataism. Theoretical basis. A lot of modern scientific works are devoted to the analysis of the information society, its problems and features. The information society is (...) a logical continuation of the scientific and technological revolution, which led to the rapid growth of scientific knowledge and the technology development. In the 20th century, technologies have touched the sphere of knowledge and information, as a result of which the formation and development of the information society, or "knowledge society", takes place. Information becomes the main resource in it, and, one way or another, a person’s life is inextricably connected with the information space. With the information society formation, the problem of information search and processing becomes one of the most urgent. It turns out that despite the abundance and availability of information, it is very difficult to determine its relevance. A lot of effort is spent on developing information retrieval algorithms. Another problem is related to the person’s inability to process large amounts of data. This situation begins to influence not only the education process and professional activity, but also the formation of a person’s personality. A person is "lost" in the information space and gradually loses his/her "I". Algorithms for data analysis come to the rescue, but gradually, instead of giving a person material for thought, they begin to make decisions on their own, and therefore, live life instead of a person. With the advent of Big Data processing algorithms, a new ideological paradigm appears – dataism, which predicts the merger of a person with the general data flow. Originality. The authors make assumptions that the dataistic future is "natural". A lot of works, including in the framework of philosophy, are focused on the problem of "dissolving" a person in the information space and finding ways to overcome it. But, in our opinion, this process is a completely logical continuation of human evolution. Conclusions. Existence of a person as a data flow is not a problem and a threat, but a new dimension of his/her being, and, therefore, requires a careful study and formulation of the main principles of this form of existence. (shrink)

A guide for scientists who would like to contribute to the professional development of science teachers for elementary schools. Based on information from over 180 programs, describes what activities work and why, and suggests how to identify programs teachers have found to be effective and take the initial steps to become involved. Also provides vignettes illustrating the daily work of science teachers. Annotation copyright by Book News, Inc., Portland, OR.

De unione Verbi incarnati est sans doute celle des Questions disputees qui a suscite parmi les disciples de saint Thomas d'Aquin les plus apres controverses. Seule en effet, elle mentionne, a cote de l'unique esse personnel du Christ, un autre etre de ce suppot, correspondant a la nature humaine. Comment concilier cette affirmation avec la doctrine thomasienne de l'unite d'etre substantiel? Et ne risque-t-elle pas de remettre en cause l'unite ontologique du Christ, et par la de detruire Jesus? Mais au-dela (...) de ces controverses, notre QuAestio revele l'emerveillement d'un contemplatif fascine par la nouveaute ineffable de l'Incarnation. 2000 ans apres la naissance du Christ, cette oeuvre puissante, publiee pour la premiere fois en edition latin-francais, ne pourra manquer de susciter un ardent interet. (shrink)

Worship is a topic that is rarely considered by philosophers of religion. In a recent paper, Tim Bayne and Yujin Nagasawa challenge this trend by offering an analysis of worship and by considering some difficulties attendant on the claim that worship is obligatory. I argue that their case for there being these difficulties is insufficiently supported. I offer two reasons that a theist might provide for the claim that worship is obligatory: a divine command, and the demands of justice with (...) respect to God's redemption of humanity. I also challenge the soundness of some of the analogies they employ in their argument. (shrink)

[D. H. Mellor] Kant's claim that our knowledge of time is transcendental in his sense, while false of time itself, is true of tenses, i.e. of the locations of events and other temporal entities in McTaggart's A series. This fact can easily, and I think only, be explained by taking time itself to be real but tenseless. /// [J. R. Lucas] Mellor's argument from Kant fails. The difficulties in his first Antinomy are due to topological confusions, not the tensed nature (...) of time. Nor are McTaggart' s difficulties due to the tensed nature of time. The ego-centricity of tensed discourse is an essential feature of communication between selves, each of whom refers himself as 'I', and is required for talking about time as well as experience and agency. Arguments based on the Special Theory are misconceived. Some rest on a confused notion of 'topological simultaneity'. In the General Theory a cosmic time is defined, as also in quantum mechanics, where a natural present is defined by a unique hyperplane of collapse into eigen-ness. (shrink)

In 1999, da Silva, D'Ottaviano and Sette proposed a general definition for the term translation between logics and presented an initial segment of its theory. Logics are characterized, in the most general sense, as sets with consequence relations and translations between logics as consequence-relation preserving maps. In a previous paper the authors introduced the concept of conservative translation between logics and studied some general properties of the co-complete category constituted by logics and conservative translations between them. In this paper we (...) present some conservative translations involving classical logic, Lukasiewicz three-valued system L3, the intuitionistic system I1 and several paraconsistent logics, as for instance Sette's system P1, the D'Ottaviano and da Costa system J3 and da Costa's systems Cn, 1≤ n≤ω. (shrink)

This paper suggests that empirical educational research has not, on the whole, been treated well by philosophers of education. A variety of criticisms have been offered, ranging from triviality, conceptual confusion and the impossibility of empirically studying normative processes. Furthermore, many of those who criticise, or dismiss, empirical research do so without subjecting any specific examples to careful scholarly scrutiny. It is suggested that both philosophy of education, and the empirical research enterprise, stand to profit if philosophers pay more attention (...) to real cases—and this attention is especially important at present, when research funding is being based on spurious scientistic criteria such as the use of ‘gold standard’ randomised experimental research designs. (shrink)