If one formulates Helmholtz's ideas about perception in terms of modern-day theories one arrives at a model of perceptual inference and learning that can explain a remarkable range of neurobiological facts. Using constructs from statistical physics it can be shown that the problems of inferring what cause our sensory inputs and learning causal regularities in the sensorium can be resolved using exactly the same principles. Furthermore, inference and learning can proceed in a biologically plausible fashion. The ensuing scheme rests on (...) Empirical Bayes and hierarchical models of how sensory information is generated. The use of hierarchical models enables the brain to construct prior expectations in a dynamic and context-sensitive fashion. This scheme provides a principled way to understand many aspects of the brain's organisation and responses. In this paper, we suggest that these perceptual processes are just one emergent property of systems that conform to a free-energy principle. The free-energy considered here represents a bound on the surprise inherent in any exchange with the environment, under expectations encoded by its state or configuration. A system can minimise free-energy by changing its configuration to change the way it samples the environment, or to change its expectations. These changes correspond to action and perception, respectively, and lead to an adaptive exchange with the environment that is characteristic of biological systems. This treatment implies that the system's state and structure encode an implicit and probabilistic model of the environment. We will look at models entailed by the brain and how minimisation of free-energy can explain its dynamics and structure. (shrink)

If one formulates Helmholtz’s ideas about perception in terms of modern-day theories one arrives at a model of perceptual inference and learning that can explain a remarkable range of neurobiological facts. Using constructs from statistical physics it can be shown that the problems of inferring what cause our sensory inputs and learning causal regularities in the sensorium can be resolved using exactly the same principles. Furthermore, inference and learning can proceed in a biologically plausible fashion. The ensuing scheme rests on (...) Empirical Bayes and hierarchical models of how sensory information is generated. The use of hierarchical models enables the brain to construct prior expectations in a dynamic and context-sensitive fashion. This scheme provides a principled way to understand many aspects of the brain’s organisation and responses. In this paper, we suggest that these perceptual processes are just one emergent property of systems that conform to a free-energy principle. The free-energy considered here represents a bound on the surprise inherent in any exchange with the environment, under expectations encoded by its state or configuration. A system can minimise free-energy by changing its configuration to change the way it samples the environment, or to change its expectations. These changes correspond to action and perception, respectively, and lead to an adaptive exchange with the environment that is characteristic of biological systems. This treatment implies that the system’s state and structure encode an implicit and probabilistic model of the environment. We will look at models entailed by the brain and how minimisation of free-energy can explain its dynamics and structure. (shrink)

The Repugnant Conclusion served an important purpose in catalyzing and inspiring the pioneering stage of population ethics research. We believe, however, that the Repugnant Conclusion now receives too much focus. Avoiding the Repugnant Conclusion should no longer be the central goal driving population ethics research, despite its importance to the fundamental accomplishments of the existing literature.

This thought-provoking book discusses the concept of progress in economics and investigates whether any advance has been made in its different spheres of research. The authors look back at the history, successes and failures of their respective fields and thoroughly examine the notion of progress from an epistemological and methodological perspective. The idea of progress is particularly significant as the authors regard it as an essentially contested concept which can be defined in many ways – theoretically or empirically; locally or (...) globally; or as encouraging or impeding the existence of other research traditions. The authors discuss the idea that for progress to make any sense there must be an accumulation of knowledge built up over time rather than the replacement of ideas by each successive generation. Accordingly, they are not concerned with estimating the price of progress, reminiscing in the past, or assessing what has been lost. Instead they apply the complex mechanisms and machinery of the discipline to sub-fields such as normative economics, monetary economics, trade and location theory, Austrian economics and classical economics to critically assess whether progress has been made in these areas of research. -/- Bringing together authoritative and wide-ranging contributions by leading scholars, this book will challenge and engage those interested in philosophy, economic methodology and the history of economic thought. It will also appeal to economists in general who are interested in the advancement of their profession. (shrink)

Dondeyne, A. Pluriformiteit en eenheid van de filosofie.--Peperzak, A. Wegwijzers naar een dialogiek?--Boer, T. de. De eindigheid van de mens en de oneindigheid van de waarheid.--Hollak, J. Wijsgerige reflecties over de scheppingsidee : St. Thomas, Hegel en de Grieken.--Plat, J. Kants kritiek op de rationele psychologie.--Melsen, A. van. Wijsgerige antropologie en de ontwikkeling van natuurwetenschap en techniek.--Buytendijk, F. Het pathisch aspect van de eindigheid.--Struyker Boudier, H. 's Bergbeklimmers einder.

There is a deeply entrenched view in philosophy and physics, the closed systems view, according to which isolated systems are conceived of as fundamental. On this view, when a system is under the influence of its environment this is described in terms of a coupling between it and a separate system which taken together are isolated. We argue against this view, and in favor of the alternative open systems view, for which systems interacting with their environment are conceived of as (...) fundamental, and the environment's influence is represented via the dynamical equations that govern the system's evolution. Taking quantum theories of closed and open systems as our case study, and considering three alternative notions of fundamentality: (i) ontic fundamentality, (ii) epistemic fundamentality, and (iii) explanatory fundamentality, we argue that the open systems view is fundamental, and that this has important implications for the philosophy of physics, the philosophy of science, and for metaphysics. (shrink)

We say that A≤LRB if every B-random set is A-random with respect to Martin–Löf randomness. We study this relation and its interactions with Turing reducibility, classes, hyperimmunity and other recursion theoretic notions.

It is argued that those who defend the Everett, or ‘many-worlds’, interpretation of quantum mechanics should embrace what we call the general quantum theory of open systems (GT) as the proper framework in which to conduct foundational and philosophical investigations in quantum physics. GT is a wider dynamical framework than its alternative, standard quantum theory (ST). This is true even though GT makes no modifications to the quantum formalism. GT rather takes a different view, what we call the open systems (...) view, of the formalism; i.e., in GT, the dynamics of systems whose physical states are fundamentally represented by density operators are represented as fundamentally open as specified by an in general non-unitary dynamical map. This includes, in principle, the dynamics of the universe as a whole. We argue that the more general dynamics describable in GT can be physically motivated, that there is as much prima facie empirical support for GT as there is for ST, and that GT could be fully in the spirit of the Everett interpretation—that there might, in short, be little reason for an Everettian not to embrace the more general theoretical landscape that GT allows one to explore. (shrink)

Researchers from diverse disciplines, including organismal and cellular physiology, sports science, human nutrition, evolution and ecology, have sought to understand the causes and consequences of the surprising variation in metabolic rate found among and within individual animals of the same species. Research in this area has been hampered by differences in approach, terminology and methodology, and the context in which measurements are made. Recent advances provide important opportunities to identify and address the key questions in the field. By bringing together (...) researchers from different areas of biology and biomedicine, we describe and evaluate these developments and the insights they could yield, highlighting the need for more standardisation across disciplines. We conclude with a list of important questions that can now be addressed by developing a common conceptual and methodological toolkit for studies on metabolic variation in animals. (shrink)

A number of distinct definitions ofsustainable agriculture have been proposed. In this paper we criticize two such definitions, primarily for conflating sustainability with other objectives such as economic viability and ecological integrity. Finally, we propose and defend a definition which avoids our objections to the other definitions.

This is a review of the issue of randomness in quantum mechanics, with special emphasis on its ambiguity; for example, randomness has different antipodal relationships to determinism, computability, and compressibility. Following a philosophical discussion of randomness in general, I argue that deterministic interpretations of quantum mechanics are strictly speaking incompatible with the Born rule. I also stress the role of outliers, i.e. measurement outcomes that are not 1-random. Although these occur with low probability, their very existence implies that the no-signaling (...) principle used in proofs of randomness of outcomes of quantum-mechanical measurements should be reinterpreted statistically, like the second law of thermodynamics. In three appendices I discuss the Born rule and its status in both single and repeated experiments, review the notion of 1-randomness that in various guises was investigated by Kolmogorov and others and treat Bell’s Theorem and the Free Will Theorem with their implications for randomness. (shrink)

Previously conducted structural magnetic resonance imaging (MRI) studies on the neuroanatomical correlates of mathematical abilities and competencies have a number of methodological limitations. Besides small sample sizes, the majority of these studies have employed voxel-based morphometry (VBM) – a method that, although it is easily to implement, has some major drawbacks. Taking this into account, the current study is the first to investigate in a large sample of typically developed adults the associations between mathematical abilities and variations in brain surface (...) structure by using surface-based morphometry (SBM). SBM is a method that also allows the investigation of brain morphometry by avoiding the pitfalls of VBM. Eighty-nine young adults were tested with a large battery of psychometric tests to measure mathematical competencies in four different areas: (1) simple arithmetic, (2) complex arithmetic, (3) higher-order mathematics and (4) numerical intelligence. In addition, we asked participants for their mathematics grade of their final school exam. Inside the MRI scanner, we collected high-resolution T1-weighted anatomical images from each subject. SBM analyses were performed with the computational anatomy toolbox (CAT12) and indices for cortical thickness, for cortical surface complexity, for gyrification and for sulcal depth were calculated. Further analyses revealed associations between (1) the cortical surface complexity of the right superior temporal gyrus and numerical intelligence, (2) the depth of the right central sulcus and adults’ ability to solve complex arithmetic problems and (3) the depth of the left parieto-occipital sulcus and adults’ higher-order mathematics competence. Interestingly, no relationships with previously reported brain regions were observed, thus, suggesting the importance of similar research to confirm the role of the brain regions found in this study. (shrink)

ZusammenfassungDieser Beitrag konzentriert sich auf eine starke und auf eine schwache Seite von Bayers Zugang zu Luthers Theologie. So wird als Stärke angesehen, dass das Thema der Rechtfertigung in Luthers Theologie als allumfassend angesetzt wird. Dagegen besteht eine Schwäche in der Art und Weise, wie Bayer durch Luthers Dialektik der zwei Arten, in denen Gott sich verbirgt – also verborgen »unter dem Gegenteil« und absolut verborgen – hindurch bricht, indem er die beiden trennt und diese Aufteilung als Kriterium verwendet, um (...) zwischen einer Periode, in der Luther die reformatorische Einsicht vollständig ausarbeitet, und einem vor-reformatorischen Luther zu unterscheiden. Diese Luther-Interpretation sollte nochmals überdacht werden, denn sie verneint die Entsprechung und die kontrapunktisch zu verstehende Beziehung zwischen dieser doppelten Verborgenheit im Lichte des »offenbaren Gottes«. Ein ähnliches Problem taucht dann auf, wenn Bayer die Rede vom dreieinigen Gott, die ausschließlich am Evangelium orientiert ist, unterscheidet von einer allgemeinen Art und Weise, von Gott zu reden, die allein auf dem Gesetz basiert. Luthers Vorstellung, dass die Unterscheidung zwischen Gesetz und Evangelium vollständig in Gottes Offenbarung des Evangeliums integriert ist, widerspricht einer solchen Unterscheidung. Dieser Beitrag betrachtet nicht nur die Unterscheidung zwischen einem unreifen und einem reifen Luther, der alle Implikationen der reformatorischen Einsicht ausgearbeitet hat, als unnötig, sondern er würdigt den jungen Luther als einen Theologen, der in der Lage ist, dasjenige zusammen zu halten, was beim späten Luther auseinander zu fallen droht. Glücklicherweise beinhaltet Bayers Studie auch Anknüpfungsmöglichkeiten für eine solche Interpretation Luthers, die die positiven ebenso wie die negativen Aspekte beider Arten der Verborgenheit ebenso wie Gesetz und Evangelium in einem einzigen kontinuierlichen Prozess integriert.SummaryThis contribution concentrates on one strong and one weak side of Bayer's approach to Luther's theology. It finds a strength in the universally implemented theme of justification in Luther's theological thought. A weakness is however found in the way Bayer breaks through Luther's dialectics concerning the dual way God hides himself – i. e. hidden ‘under the opposite’ and absolutely hidden – by separating them and using this division as a criterion to distinguish between the period where Luther had fully worked out the insight of the Reformation and the pre-Reformation Luther. Such an interpretation of Luther needs to be reconsidered because it neglects the correspondence and the contrapuntal relation between this double hiddeness in the light of the ‘revealed God’.A similar problem arises when Bayer divides speaking about the triune God, which is exclusively orientated towards the Gospel, from a general way of speaking about God, which is only based on the Law. Luther's idea that the distinction between Law and Gospel is fully integrated into God's revelation of the Gospel contradicts such a division.This contribution considers not only a distinction between an immature and a mature Luther who has worked out all the implications of the reformation insight unnecessary, but appreciates the young Luther as a theologian who is capable of holding together what the later Luther is in danger of letting fall apart. Fortunately, in Bayer's study there are also openings for a Luther interpretation that includes the positive as well as the negative aspect of both kinds of hiddeness and of Law and Gospel in a single continuous process. (shrink)

Tudo se passa como se a escrita filosófica de Voltaire se desenvolvesse em uma dupla oposição: de um lado, ela visa denunciar o palavrório dos fazedores de sistemas e a cacofonia a que ele conduz, opondo-lhes a prudência e a modéstia; de outro, ela pretende restaurar, contra a tentação cética, o direito à busca da verdade. Em Voltaire, o discurso filosófico nasce desta tensão, do desejo de dizer o mundo e da vontade de se calar, tensão que a escolha do (...) diálogo tem por função explicitar, dramatizando-a. Perguntamo-nos, então, sobre o lugar e o estatuto da filosofia nos Diálogos . Conteúdo ou continente, conjunto de temas ou modalidade discursiva, a filosofia não está tranquila nesses textos, ela aparece em muitos aspectos como uma exigência problemática. (shrink)

Tudo se passa como se a escrita filosófica de Voltaire se desenvolvesse em uma dupla oposição: de um lado, ela visa denunciar o palavrório dos fazedores de sistemas e a cacofonia a que ele conduz, opondo-lhes a prudência e a modéstia; de outro, ela pretende restaurar, contra a tentação cética, o direito à busca da verdade. Em Voltaire, o discurso filosófico nasce desta tensão, do desejo de dizer o mundo e da vontade de se calar, tensão que a escolha do (...) diálogo tem por função explicitar, dramatizando-a. Perguntamo-nos, então, sobre o lugar e o estatuto da filosofia nos Diálogos. Conteúdo ou continente, conjunto de temas ou modalidade discursiva, a filosofia não está tranquila nesses textos, ela aparece em muitos aspectos como uma exigência problemática. (shrink)

Name der Zeitschrift: Klio Jahrgang: 99 Heft: 2 Seiten: 747-752.

Dans le courant du XVII e siècle se multiplient en Chine les discours sur l’amitié. En partie liés à la déliquescence des structures traditionnelles et notamment familiales qui servaient de base au fonctionnement social de l’empire, ils proposent de réévaluer le lien amical dans l’organisation politique. He Xinyin (1517-1579) est à cet égard l’un des penseurs les plus innovants et radicaux. À travers la lecture de quelques essais majeurs recueillis dans le recueil de ses œuvres complètes, l’article entend expliciter la (...) réévaluation de l’amitié et sa dimension subversive chez cet auteur et montrer comment une telle redéfinition a pu instiller dans la culture chinoise du XVII e siècle et au-delà de nouveaux rapports subjectifs où l’individu émerge comme une entité cardinale dans les rapports sociaux ainsi que les idées de liberté d’expression. (shrink)

Abstract The view that mirror self-recognition (MSR) is a definitive demonstration of self-awareness is far from universally accepted, and those who do support the view need a more robust argument than the mere assumption that self-recognition implies a self-concept (e.g. Gallup in Socioecology and Psychology of Primates, Mouton, Hague, 1975 ; Gallup and Suarez in Psychological Perspectives on the Self, vol 3, Erlbaum, Hillsdale, 1986 ). In this paper I offer a new argument in favour of the view that MSR (...) shows self-awareness by examining the nature of the mirror image itself. I argue, using the results of ‘symbol-mindedness’ experiments by Deloache (Trends Cogn Sci 8(2):66–70, 2004) , that where self-recognition exists, the mirror image must be functioning as a symbol from the perspective of the subject and the subject must therefore be ‘symbol-minded’ and hence concept possessing. Further to this, according to the Concept Possession Hypothesis of Self-Consciousness (Savanah in Conscious Cogn 2011 ), concept possession alone is sufficient to demonstrate the existence of self-awareness. Thus MSR as a demonstration of symbol-mindedness implies the existence of self-awareness. I begin by defending the ‘mark test’ protocol as a robust methodology for determining self-recognition. Then follows a critical examination of the extreme views both for and against the interpretation of MSR as an indication of self-awareness: although the non-mentalistic interpretation of MSR is unconvincing, the argument presented by Gallup is also inadequate. I then present the symbol-mindedness argument to fill in the gaps in the Gallup approach. Content Type Journal Article Pages 1-17 DOI 10.1007/s10539-012-9318-2 Authors Stephane Savanah, ARC Centre of Excellence in Cognition and its Disorders (CCD), Macquarie University, Sydney, NSW 2109, Australia Journal Biology and Philosophy Online ISSN 1572-8404 Print ISSN 0169-3867. (shrink)

ObjectiveIn this study we used functional magnetic resonance imaging to investigate whether motor imagery of handwriting and circle drawing activates a similar handwriting network as writing and drawing itself.MethodsEighteen healthy right-handed participants wrote the German word “Wellen” and drew continuously circles in a sitting and lying position to capture kinematic handwriting parameters such as velocity, pressure and regularity of hand movements. Afterward, they performed the same tasks during fMRI in a MI and an executed condition.ResultsThe kinematic analysis revealed a general (...) correlation of handwriting parameters during sitting and lying except of pen pressure during drawing. Writing compared to imagined writing was accompanied by an increased activity of the ipsilateral cerebellum and the contralateral sensorimotor cortex. Executed compared to imagined drawing revealed elevated activity of a fronto–parieto-temporal network. By contrasting writing and drawing directly, executed writing induced an enhanced activation of the left somatosensory and premotor area. The comparison of the MI of these tasks revealed a higher involvement of occipital activation during imagined writing.ConclusionThe kinematic results pointed to a high comparability of writing in a vertical and horizontal position. Overall, we observed highly overlapping cortical activity except of a higher involvement of motor control areas during motor execution. The sparse difference between writing and drawing can be explained by highly automatized writing in healthy individuals. (shrink)

It has been shown that, when observing an action, infants can rely on either outcome selection information (i.e., actions that express a choice between potential outcomes) or means selection information (i.e., actions that are causally efficient toward the outcome) in their goal attribution. However, no research has investigated the relationship between these two types of information when they are present simultaneously. In an experiment that addressed this question directly, we found that when outcome selection information could disambiguate the goal of (...) the action (e.g., the action is directed toward one of two potential targets), but means selection information could not (i.e., the action is not efficiently adjusted to the situational constraints), 7- and 9-month-old infants did not attribute a goal to an observed action. This finding suggests that means selection information takes primacy over outcome selection information. The early presence of this bias sheds light on the nature of the notion of goal in action understanding. (shrink)

The aim of this article is to investigate and discuss the notions of difference and representation in Emmanuel Levinas and Gilles Deleuze, articulating such notions through the example of a university extension project involving the formation of a musical ensemble composed of autistic children. Our research involved a review of four major philosophical works—Emmanuel Levinas’ Totality and Infinity; Among Us: Essays On Alterity; and “The Concept Of Difference In Bergson”; and Gilles Deleuze’s Difference and Repetition--in addition to secondary references. The (...) main articulations of the investigation carried out in the project consist of aspects such as: taking responsibility for the autistic child through cultivating asymmetrical relationships, a process that takes place through sensibility, below any representation; and not totalizing the alterity involved while maintaining, at the same time, its radical difference. In addition, there is an emphasis in the work on the difference of each child, beyond his or her diagnostic identity, understanding that all participants are undergoing unique processes of differentiation, and that some differences are not more privileged than others, in that that such hierarchies are determined by power relations. Another contribution of this research is the emphasis on the intensive affective flows of children, and the construction of relationships of mutual affection, which increases the circulation of vital energy in each one. Finally, the results of the project are offered as guidelines for clinical practice, and for the cultivation of a politics of difference, as an alternative to hegemonic practices in autism studies in contemporary times. (shrink)

I introduce an effective enumeration of all effective enumerations of classes of r. e. sets and define with this the index set IE of injectively enumerable classes. It is easy to see that this set is ∑5 in the Arithmetical Hierarchy and I describe a proof for the ∑5-hardness of IE.

Since the Renaissance, dramatic theory has been strongly influenced, sometimes even dominated by Aristotle’s Poetics. Aristotle’s concept of tragedy has been perceived as both a descriptive and a normative concept: a description of a practice as it should be continued. This biased reading of ancient theory is not exceptional, but in the case of Aristotle’s Poetics, a particular question can be raised. Aristotle has written about tragedy, at a moment that tragedy had no meaningful political or civic function anymore. As (...) political theory—e.g. as developed in the Politics and the Art of Rhetoric—should contain the risks of transgression in political practice, so poetic theory can contain the risks of the representation of transgressions in poetic practices such as the performance of tragedy. Apart from an account on Aristotle’s Poetics as a integral part of his ethical and political theory, this article argues the (mis)readings of Aristotelian dramatic theory since the Renaissance, and especially in 17th century France are not coincidental. Aristotle’s theory itself fits neatly into a political-theoretical framework or, if one puts it more brutally, an ideology. The particular theatricality of French absolutism took clearly its advantage from this ideological (mis)readings of Aristotle. (shrink)

The volume documents, and makes an original contribution to, an astonishing period in twentieth-century philosophy—the progress of Arne Naess's ecophilosophy from its inception to the present. It includes Naess's most crucial polemics with leading thinkers, drawn from sources as diverse as scholarly articles, correspondence, TV interviews and unpublished exchanges. The book testifies to the skeptical and self-correcting aspects of Naess's vision, which has deepened and broadened to include third world and feminist perspectives. Philosophical Dialogues is an essential addition to the (...) literature on environmental philosophy. (shrink)

This study examined the hypothesis that a key process in conditional reasoning with concrete premises involves on-line retrieval of information about potential alternate antecedents. Participants were asked to solve reasoning problems with causal conditional premises (If cause P then effect Q). These premises were inserted into short contexts. The availability of potential alternatives was varied from one context to another by adding statements that explicitly invalidated one or more of these alternatives (i.e., other causes that lead to the effect Q). (...) The invalidated alternatives differed in the degree of their semantic association to the consequent term (Q). The results show that the effect of invalidating one or more potential alternatives on the two uncertain logical forms, AC and DA, was largely determined by their relative associative strength. These results strongly support a model for conditional reasoning with causal premises that supposes that a key element in responding to the uncertain logical forms is on-line retrieval of at least one potential alternative antecedent. (shrink)