The paper points out that the modern formulation of Bohm’s quantum theory known as Bohmian mechanics is committed only to particles’ positions and a law of motion. We explain how this view can avoid the open questions that the traditional view faces according to which Bohm’s theory is committed to a wave-function that is a physical entity over and above the particles, although it is defined on configuration space instead of three-dimensional space. We then enquire into the status of the (...) law of motion, elaborating on how the main philosophical options to ground a law of motion, namely Humeanism and dispositionalism, can be applied to Bohmian mechanics. In conclusion, we sketch out how these options apply to primitive ontology approaches to quantum mechanics in general. (shrink)

Using the example of classical electrodynamics, I argue that the concept of fields as mediators of particle interactions is fundamentally flawed and reflects a misguided attempt to retrieve Newtonian concepts in relativistic theories. This leads to various physical and metaphysical problems that are discussed in detail. In particular, I emphasize that physics has not found a satisfying solution to the self-interaction problem in the context of the classical field theory. To demonstrate the superiority of a pure particle ontology, I defend (...) the direct interaction theory of Wheeler and Feynman against recent criticism and argue that it provides the most cogent formulation of classical electrodynamics. (shrink)

We discuss Boltzmann’s probabilistic explanation of the second law of thermodynamics providing a comprehensive presentation of what is called today the typicality account. Countering its misconception as an alternative explanation, we examine the relation between Boltzmann’s H-theorem and the general typicality argument demonstrating the conceptual continuity between the two. We then discuss the philosophical dimensions of the concept of typicality and its relevance for scientific reasoning in general, in particular for understanding the reduction of macroscopic laws to microscopic laws. Finally, (...) we reply to various common criticisms of the typicality account. (shrink)

The paper provides a critical discussion of the Super-Humean view of spacetime and the “minimalist ontology” in terms of Leibnizian relations and primitive matter points, recently developed by Esfeld et al. It investigates, in particular, the empirical adequacy of the proposed metaphysics, arguing that Super-Humeanism cannot provide a plausible account of space and time without committing to bona fide geometric structure in the fundamental relations. Against this backdrop, I propose a moderate version of Super-Humeanism and discuss its possible application to (...) Euclidean space and General Relativity. (shrink)

We discuss the no-go theorem of Frauchiger and Renner based on an "extended Wigner's friend" thought experiment which is supposed to show that any single-world interpretation of quantum mechanics leads to inconsistent predictions if it is applicable on all scales. We show that no such inconsistency occurs if one considers a complete description of the physical situation. We then discuss implications of the thought experiment that have not been clearly addressed in the original paper, including a tension between relativity and (...) nonlocal effects predicted by quantum mechanics. Our discussion applies in particular to Bohmian mechanics. (shrink)

The article addresses the debate about the empirical status of particles versus wave functions in Bohmian quantum mechanics. It thereby clarifies questions and misconceptions about the role of the...

The paper discusses recent proposals by Carroll and Chen, as well as Barbour, Koslowski, and Mercati to explain the arrow of time without a Past Hypothesis, i.e. the assumption of a special initial state of the universe. After discussing the role of the Past Hypothesis and the controversy about its status, we explain why Carroll's model - which establishes an arrow of time as typical - can ground sensible predictions and retrodictions without assuming something akin to a Past Hypothesis. We (...) then propose a definition of a Boltzmann entropy for a classical N-particle system with gravity, suggesting that a Newtonian gravitating universe might provide a relevant example of Carroll's entropy model. This invites comparison with the work of Barbour, Koslowski, and Mercati that identifies typical arrows of time in a relational formulation of classical gravity on shape space. We clarify the difference between this gravitational arrow in terms of shape complexity and the entropic arrow in absolute spacetime, and work out the key advantages of the relationalist theory. We end by pointing out why the entropy concept relies on absolute scales and is thus not relational. (shrink)

The article sets out a primitive ontology of the natural world in terms of primitive stuff—that is, stuff that has as such no physical properties at all—but that is not a bare substratum either, being individuated by metrical relations. We focus on quantum physics and employ identity-based Bohmian mechanics to illustrate this view, but point out that it applies all over physics. Properties then enter into the picture exclusively through the role that they play for the dynamics of the primitive (...) stuff. We show that such properties can be local, as well as holistic, and discuss two metaphysical options to conceive them, namely, Humeanism and modal realism in the guise of dispositionalism. 1 Introduction2 Primitive Ontology: Primitive Stuff3 The Physics of Matter as Primitive Stuff4 The Humean Best System Analysis of the Dynamical Variables5 Modal Realism about the Dynamical Variables6 Conclusion. (shrink)

By means of the examples of classical and Bohmian quantum mechanics, we illustrate the well-known ideas of Boltzmann as to how one gets from laws defined for the universe as a whole to dynamical relations describing the evolution of subsystems. We explain how probabilities enter into this process, what quantum and classical probabilities have in common and where exactly their difference lies.

The paper uses the concept of typicality to spell out an argument against Humean supervenience and the best system account of laws. It proves that, in a very general and robust sense, almost all possible Humean worlds have no Humean laws. They are worlds of irreducible complexity that do not allow for any systematization. After explaining typicality reasoning in general, the implications of this result for the metaphysics of laws are discussed in detail.

Charlotte Werndl and Roman Frigg discuss the relationship between the Boltzmannian and Gibbsian framework of statistical mechanics, addressing, in particular, the question when equilibrium values calculated in both frameworks agree. This note points out conceptual confusions that could arise from their discussion, concerning, in particular, the authors’ use of “Boltzmann equilibrium.” It also clarifies the status of the Khinchin condition for the equivalence of Boltzmannian and Gibbsian equilibrium predictions and shows that it follows, under the assumptions proposed by Werndl and (...) Frigg, from standard arguments in probability theory. (shrink)

The essay traces the following idea from the presocratic philosopher Heraclitus, to the Pythagoreans, to Newton’s Principia: Laws of nature are laws of proportion for matter in motion. Proportions are expressed by numbers or, as the essay proposes, even identical to real numbers. It is argued that this view is still relevant to modern physics and helps us understand why physical laws are mathematical.

AbstractBohmian mechanics grounds the predictions of quantum mechanics in precise dynamical laws for a primitive ontology of point particles. In an appraisal of the de-Broglie–Bohm theory, the paper discusses the crucial epistemological and conceptual role that a primitive ontology plays within a physical theory. It argues that quantum theories without primitive ontology fail to make contact with observable reality in a clear and consistent manner. Finally, it discusses Einstein’s epistemological model and why it supports the primitive ontology approach.

Parkinsonism (PD) is a neurodegenerative disorder of the brain resulting in dopamine deficiency caused by the progressive death of dopaminergic neurons. PD is characterized by a combination of rigidity, poverty of movement, tremor and postural instability. Selegiline is a selective and irreversible propargylamine type B monoamine oxidase (MAO‐B) inhibitor. This drug, which inhibits dopamine metabolism, has been effectively used in the treatment of PD. However, its therapeutic effects are compromised by its many neurotoxic metabolites. To circumvent this obstacle, a novel (...) MAO‐B inhibitor, rasagiline, was developed. Paradoxically, the neuroprotective mechanism of propargylamines in different neuronal models appears to be independent of MAO‐B inhibition. Recent investigations into the neuroprotective mechanism of propargylamines indicate that glyceraldehyde‐3‐phosphate dehydrogenase (GAPDH), MAO‐B and/or other unknown proteins may represent pivotal proteins in the survival of the injured neurons. Delineation of the mechanism(s) involved in the neuroprotective effects exerted by MAO‐B inhibitors may provide the key to preventive novel therapeutic modalities. BioEssays 26:80–90, 2004. © 2003 Wiley Periodicals, Inc. (shrink)

In my commentary, I will argue that the conclusions drawn in the paper Noncommutative causality in algebraic quantum field theory by Gábor Hofer-Szaboó are incorrect. As proven by J.S. Bell, a local common causal explanation of correlations violating the Bell inequality is impossible.

In a recent paper, Werndl and Frigg discuss the relationship between the Boltzmannian and Gibbsian framework of statistical mechanics, addressing in particular the question when equilibrium values calculated in both frameworks coincide. In this comment, I point out serious flaws in their work and try to put their results into proper context. I also clarify the concept of Boltzmann equilibrium, the status of the "Khinchin condition" and their connection to the law of large numbers.

This note clarifies several details about the description of the measurement process in Bohmian mechanics and responds to a recent preprint by Shan Gao, wrongly claiming a contradiction in the theory.

Authors philosophical notes on life, conduct of life from the perspective of a life.

Das vorliegende Buch richtet sich an Studierende der Physik, für die nach der Quantenmechanik-Vorlesung die wesentliche Frage offen geblieben ist: „Was sagt denn nun der mathematische Formalismus, den ich jetzt ausgiebig und ach so mühsam studiert habe, über die Natur aus?“. Bei der Suche nach der Antwort besprechen die Autoren unter anderem die modernen Quantentheorien, die von John Stuart Bell „Theorien ohne Beobachter“ genannt wurden: die Bohmsche Mechanik, die Kollaps-Theorie und die Viele-Welten-Theorie. -/- Neben zielgerichteten mathematischen Aussagen, die in Kursvorlesungen (...) selten vorkommen, erklärt das Buch anhand der neuen Theorien die Rolle der Wellenfunktion und des Zufalls in der Quantenmechanik. Insbesondere beschäftigen sich die Autoren auch mit der Gedankenwelt des Physikers John Stuart Bell, der mit den berühmten, aber leider oft missverstandenen Bellschen Ungleichungen unser physikalisches Weltbild nachhaltig verändert hat. Das Buch eignet sich damit begleitend oder ergänzend zu einer Kursvorlesung über Quantenmechanik oder aber auch zum Selbststudium. (shrink)

D. D. Raphael examines the moral philosophy of Adam Smith (1723-90), best known for his famous work on economics, The Wealth of Nations, and shows that his thought still has much to offer philosophers today. Raphael gives particular attention to Smith's original theory of conscience, with its emphasis on the role of 'sympathy' (shared feelings).

The Problem of Perception offers two arguments against direct realism--one concerning illusion, and one concerning hallucination--that no current theory of ...

This is not your psychoanalyst's unconscious.

Abstract:Contemporary common sense holds that authenticity is an ethical ideal: that there is something bad about inauthenticity, and something good about authenticity. Here we criticize the view that authenticity is bad because it detracts from the wellbeing of the inauthentic person, and propose an alternative moral account of the badness of inauthenticity, based on the idea that inauthentic behaviour is potentially misleading.

" En écrivant son Traité de l'Interprétation, Aristote a trempé sa plume à l'encre de son esprit! " L'antique remarque de Cassiodore vaut encore aujourd'hui tant la matière étudiée est complexe et le style ramassé. Aristote démonte les mécanismes du langage philosophique, aux confins de la linguistique et de la métaphysique. Il offre à cette occasion des développements fondateurs sur la formulation de la vérité, les règles de mise en contradiction, les propositions universelles, la contingence des jugements sur le futur, (...) ou encore les redoutables énonciations modales. S'appuyant sur ses prédécesseurs, Thomas d'Aquin en rédige un commentaire hautement structuré, reconnu comme l'un des plus explicites. Demeuré cependant inachevé, il est complété par Thomas de Vio, dit Cajetan, un des premiers grands thomistes et maître logicien. C'est de l'ensemble de ces deux parties de commentaires que nous proposons la traduction ; la seconde pour la première fois en langue française. (shrink)

1. Hobbes-Gay.--2. Hume-Bentham and Index.

On se souvient de la formule de Churchill : " La démocratie est le pire des régimes, à l'exception de tous les autres". A l'évidence, nous n " aimons " pas la démocratie. Et pourtant nous sommes tous démocrates... Étrange procès en désamour que celui-là, dont la virulence égale l'ancienneté : toute petite déjà, à Athènes, la démocratie ne manquait pas de détracteurs... Myriam Revault d'Allonnes s'interroge, non pas sur les critiques ou les sarcasmes dont la démocratie est l'objet, mais (...) sur la nature de l'expérience démocratique, travaillée par l'incertitude, le conflit, l'inachèvement, inextricablement liée à ce qui s'oppose à elle et la menace. Comment l'homme démocratique, confronté à cette existence toujours problématique, ne serait-il pas en proie à l'insatisfaction et à la déception permanentes? Cependant, si nous n' "aimons" pas la démocratie, pouvons-nous ne pas la vouloir? Car c'est bien l'expérience démocratique qui fait de nous des sujets éthiques et politiques, des citoyens qui ne veulent pas être ainsi gouvernés : " pas comme ça, pas pour ça, pas par eux ". (shrink)

Theologien de haut vol et pasteur zele, Guillaume d'Auvergne a ete eveque de Paris de 1228 a 1249. Proche de la cour capetienne et des milieux mendiants de Paris, il a ete temoin et acteur des principaux evenements politiques et culturels qui ont caracterise la vie du royaume et de sa capitale. Ses sermons, au nombre de 582, dont 25 transmis en deux ou trois versions differentes et plusieurs sous la forme de reportationes, sont ici edites pour la premiere fois. (...) Apres les deux premiers volumes consacres aux sermons de tempore, les deux autres proposeront l'edition des sermons de sanctis et de communi sanctorum et de occasionibus.". (shrink)

An Arabic language summary of the history and principles of four key Hellenic schools of philosophy: Cynicism, Skepticism, Epicureanism, and Stoicism.

"L'irruption récente de la notion de "post-vérité", désignée comme mot de l'année 2016 par le dictionnaire d'Oxford, a suscité d'innombrables commentaires journalistiques, notamment sur le phénomène des fake news, mais peu de réflexions de fond. Or, cette notion ne concerne pas seulement les liens entre politique et vérité, elle brouille la distinction essentielle du vrai et du faux, portant atteinte à notre capacité à vivre ensemble dans un monde commun. En questionnant les rapports conflictuels entre politique et vérité, Myriam Revault (...) d'Allonnes déconstruit nombre d'approximations et de confusions. Elle montre que le problème majeur de la politique n'est pas celui de sa conformité à la vérité mais qu'il est lié à la constitution de l'opinion publique et à l'exercice du jugement. L'exploration du "régime de vérité" de la politique éclaire ce qui distingue fondamentalement les systèmes démocratiques, exposés en permanence à la dissolution des repères de la certitude, à la tentation du relativisme et à la transformation des "vérités de fait" en opinions, des systèmes totalitaires, où la toute-puissance de l'idéologie fabrique un monde entièrement fictif. Loin d'enrichir le monde, la "post-vérité" appauvrit l'imaginaire social et met en cause les jugements et les expériences sensibles que nous pouvons partager. Il est urgent de prendre conscience de la nature et de la portée du phénomène si nous voulons en conjurer les effets éthiques et politiques."--Page 4 de la couverture. (shrink)

Предпринимается попытка связать результаты самопознания со взглядами человека на историю всего человеческого и мир в целом. Для тех, кто интересуется антропологическими проблемами философии.

God and the City, based on the Aquinas Lecture delivered at the University of Dallas in 2022, aims to think about politics ontologically. In other words, it seeks to reflect on, not some political theory or other, nor on the legitimacy of political action or the distinctiveness of particular regimes, but on the nature of political order as such, and how this order implicates the fundamental questions of existence, those concerning man, being, and God. Aristotle, and Aquinas after him, identified (...) metaphysics and politics as "architectonic" sciences, since each concerns in some respect the whole of reality, of which the particular sciences study a part. Chapter one of this book argues that, just as metaphysics, in studying being as a whole, cannot but address the question of God in some respect, so too does politics, the ordering of human life as a whole, necessarily implicate the existence of God. In this regard, the modern liberal project has deluded itself in attempting to render religion a private, rather than a genuinely political, matter. We cannot organize human existence without making some claim, whether implicitly or explicitly, about the nature of God and God's relation to the world. The second chapter approaches this theme from the anthropological dimension. As Plato affirmed, the "city is the soul writ large": if man is religious by nature, he cannot be properly understood, and the human good cannot be properly secured and fostered, if the "God question" is "bracketed out" of the properly political order. Moreover, if we fail to recognize the essentially political dimension of relation to God, we will be unable properly to grasp the presence of God in the (ecclesial and sacramental) Body of Christ: God cannot be real in the Church as Church unless he is also real in the city as city (and vice versa). In his De regno, Aquinas famously affirms that "the king is to be in the kingdom what the soul is in the body and what God is in the world." Chapter three offers a careful study of the body-soul relationship in order to illuminate, on the one hand, the nature of political authority, and, on the other, the precise way that God is present in human community. (shrink)

As Anthony Tol explains in his general introduction to (his translation of) Vollenhoven's 1926 inaugural address, the Reformed epistemology that Vollenhoven espouses here is essentially three-layered. Most basic is the intuition - the starting point of all knowing. It starts with discerning. Then there is knowledge. At this point language, communication, and judgments are relevant. The third layer is thought. Thought may disclose and renew or criticize and correct against the background of what we know. Thought is also central to (...) concept formation. The factor that runs through these three layers is truth, taken realistically. It has its seat in the intuition of discerning. It is central to knowledge, for the essence of knowledge is said to be "possessing truth." And in connection with thought, or more particularly in concept formation, the latter is described as "truth grasped in a form." Apart from advocating his own understanding of epistemology in this inaugural address, Vollenhoven takes issue with how epistemology is generally understood. The critique is cast in a historical overview. (shrink)

Averroës, 1126-1198; criticism and interpretation; Islamic philosophy; Religion and ploitics.

Spanning a wide range of texts, figures, and traditions from the ancient Mediterranean world, this volume gathers far-reaching, interdisciplinary papers on Greek philosophy from an international group of scholars. The book's sixteen chapters address an array of topics and themes, extending from the formation of philosophy from its first stirrings in archaic Greek as well as Egyptian, Persian, Mesopotamian, and Indian sources, through central concepts in ancient Greek philosophy and literatures of the classical period and into the Hellenistic age. Studies (...) in Ancient Greek Philosophy offers both in-depth, rigorous, attentive investigations of canonical texts in western philosophy, such as Plato's Phaedo, Gorgias, Republic, Phaedrus, Protagoras and the Metaphysics, De Caelo, Nichomachean Ethics, Generation and Corruption of Aristotle's corpus, as well as inquiries that reach back into the rich archives of the Mediterranean Basin and forward into the traditions of classical philosophy beyond the ancient world. Studies in Ancient Greek Philosophy is of interest to students and scholars working on different aspects of ancient Greek philosophy, as well as ancient philosophy more broadly. (shrink)