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)

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.

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 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.

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.

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)

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.

In this important study D. M. Armstrong offers a comprehensive system of analytical metaphysics that synthesises but also develops his thinking over the last twenty years. Armstrong's analysis, which acknowledges the 'logical atomism' of Russell and Wittgenstein, makes facts the fundamental constituents of the world, examining properties, relations, numbers, classes, possibility and necessity, dispositions, causes and laws. All these, it is argued, find their place and can be understood inside a scheme of states of affairs. This is a comprehensive and (...) rigorously this-worldly account of the most general features of reality, argued from a distinctive philosophical perspective, and it will appeal to a wide readership in analytical philosophy. (shrink)

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)

" -- Africa Today "The excellence of this book lies in the wealth of perspectives that it brings to the discussion on what constitutes philosophy, rationality, ...

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

A comprehensive introduction to the ways in which meaning is conveyed in language. Alan Cruse covers semantic matters, but also deals with topics that are usually considered to fall under pragmatics. A major aim is to highlight the richness and subtlety of meaning phenomena, rather than to expound any particular theory. Rich in examples and exercises, Meaning in Language provides an invaluable descriptive approach to this area of linguistics for undergraduates and postgraduates alike.

This book: * assumes no mathematical background and keeps the technicalities to a minimum * explains the most important applications of probability theory to ...

A record of the words and teachings of Confucius, _The Analects_ is considered the most reliable expression of Confucian thought. However, the original meaning of Confucius's teachings have been filtered and interpreted by the commentaries of Confucianists of later ages, particularly the Neo-Confucianists of the Song dynasty, not altogether without distortion.In this monumental translation by Professor D. C. Lau, an attempt has been made to interpret the sayings as they stand. The corpus of the sayings is taken as an organic (...) whole and the final test of the interpretation rests on the internal consistency it exhibits. In other words, _The Analects_ is read in the light of _The Analects._This results in a truer understanding of Confucius' thought than the traditional interpretation and paves the way for a re-assessment of its importance in the history of Chinese thought and its relevance to the present day world.This volume also contains an introduction to the life and teachings of Confucius, and three appendices on the events in the life of Confucius, on his disciples, and on the composition of _The Analects._. (shrink)

In this entry we provide a critical review of recent work on the nature and ethics of blame, including issues of moral standing.

In identifying that the 'essential tension' is the balance between conservative and innovative approaches in the development of knowledge - tried-and tested or new directions - Kuhn pointed out that these two attitudes are both appropriate. This study adds to this picture the social and psychological dynamics that underpin any such balancing.

The Greeks have long been regarded as innovators across a wide range of fields in literature, culture, philosophy, politics and science. However, little attention has been paid to how they thought and felt about novelty and innovation itself, and to relating this to the forces of traditionalism and conservatism which were also present across all the various societies within ancient Greece. What inspired the Greeks to embark on their unique and enduring innovations? How did they think and feel about the (...) new? This book represents the first serious attempt to address these issues, and deals with the phenomenon across all periods and areas of classical Greek history and thought. Each chapter concentrates on a different area of culture or thought, while the book as a whole argues that much of the impulse towards innovation came from the life of the polis which provided its setting. (shrink)

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.

In Rationalities in history, the distinguished historian David d'Avray writes a new comparative history in the spirit of Max Weber. In a strikingly original reassessment of seminal Weberian ideas, d'Avray applies value rationality to the comparative history of religion and the philosophy of law. Integrating theories of rational choice, anthropological reflections on relativism, and the recent philosophy of rationality with Weber's conceptual framework, d'Avray seeks to disengage 'rationalisation' from its enduring association with Western 'modernity.' This mode of analysis is contextualised (...) through the examples of Buddhism, Imperial China, and sixteenth-century Catholicism--in the latter case building upon unpublished archival research. This ambitious synthesis of social theory and comparative history will engage social scientists and historians from advanced undergraduate level upwards, stimulating interdisciplinary discourse, and making a significant contribution to the methodology of history. D'Avray explores the potential of this new Weberian analysis further in his companion volume, Medieval religious rationalities"--Provided by publisher. (shrink)

The verb 'imagine' admits of perspectival modification: we can imagine things from above, from a distant point of view, or from the point of view of a Russian. But in such cases, there need be no person, either real or imagined, who is above or distant from what is imagined, or who has the point of view of a Russian. We call this the puzzle of perspectival displacement. This paper sets out the puzzle, shows how it does not just concern (...) language, but also states of imagining themselves, and then presents a solution. The solution draws on the idea that many reports of imagining conceal a distinctive kind of question, and such concealed questions have an extra argument place for (what we will call) an experiencer from whose perspective things are imagined. This solution has a range of advantages over other proposals in the literature, and helps to advance two debates concerning perspectival engagement with fiction. (shrink)

This paper is an original attempt to understand the foundations of economic reasoning. It endeavors to rigorously define the relationship between subjective interpretations and objective valuations of such interpretations in the context of theoretical economics. This analysis is substantially expanded through a dynamic approach, where the truth of a valuation results in an updated interpretation or changes in the agent's subjective belief regarding the effectiveness of the selected action as well as the objective reality of the effectiveness of all other (...) possible actions (i.e. consequence realization). Complications arise when the economic agent is presented with a set of actions that render ambiguous preference, or when the effectiveness of an action cannot be perceived upon its selection, thereby necessitating a different theory of choice and consequence realization. (shrink)

Classical treatise on Advaita Ontology; critical edition with commentary and supercommentaries.

In diesem Band deckt Diego D'Angelo semiotische Strukturen in der Husserl’schen Phänomenologie der Wahrnehmung auf. Ist es der Phänomenologie darum zu tun, die Erfahrung von Dingen in unserer Umwelt zu beschreiben, so ist dabei der Begriff des Horizontes von zentraler Bedeutung: Was wir unmittelbar wahrnehmen, verweist immer schon auf anderes, was nur „mitgegeben“ ist. Wenn wir Dinge wahrnehmen, haben wir nur eine bestimmte Perspektive, d.h. wir sehen lediglich einen Aspekt. Aber wir nehmen immer ganze Gegenstände wahr (wir sehen Tische und (...) Stühle und andere Menschen). Jeder dieser Gegenstände erscheint in einem Feld weiterer Gegenstände, und es ist der Horizontbegriff, der es erlaubt, das Verhältnis zwischen Selbstgegebenheit und Mitgegebenheit zu explizieren. Dieses Buch stellt den ersten detaillierten Versuch dar, die Ursprünge solcher horizontaler Felder in semiotischen Strukturen zu suchen. Aus der Verbindung zwischen Husserls eigener Semiotik und seiner Phänomenologie der Wahrnehmung ergibt sich, dass das wahrgenommene Phänomen als Zeichen verstanden werden muss. Das Zeichen wiederum bezeichnet etwas, was in leiblicher Bewegung eingeholt werden kann. Mit der Verbindung von Leiblichkeit, Semiotik und Wahrnehmung thematisiert diese Monographie das Verhältnis zwischen folgenden phänomenologischen Forschungsgebieten: • Husserls Semiotik der Wahrnehmung in den Logischen Untersuchungen • Phänomenologische Raumanalyse – kinästhetische Indikation • Horizont und Noema • Passive Anzeige • Zeichen und Leiblichkeit als Grundlagen der Fremderfahrung • Genetische Phänomenologie und Semiotik der Erfahrung • Protentionen und teleologische Semiose • Induktion und Ursprung des menschlichen Ichs Das Buch eröffnet die Möglichkeit, Husserls Phänomenologie jenseits einer Metaphysik der Präsenz zu verstehen. Zudem leisten D'Angelos Einzeluntersuchungen einen Beitrag zu aktuellen Diskussionen in der Philosophie der leiblichen Kognition. – Eine hilfreiche Leseempfehlung für • Interessierte Themenneulinge • Bachelor- und Masterstudenten der Geisteswissenschaften • Hochschulabsolventen sowie Forschungswissenschaftler. (shrink)