Christopher G. Timpson provides the first full-length philosophical treatment of quantum information theory and the questions it raises for our understanding of the quantum world. He argues for an ontologically deflationary account of the nature of quantum information, which is grounded in a revisionary analysis of the concepts of information.

Quantum Information Theory and the Foundations of Quantum Mechanics is a conceptual analysis of one of the most prominent and exciting new areas of physics, providing the first full-length philosophical treatment of quantum information theory and the questions it raises for our understanding of the quantum world. -/- Beginning from a careful, revisionary, analysis of the concepts of information in the everyday and classical information-theory settings, Christopher G. Timpson argues for an ontologically deflationary account of the nature of (...) quantum information. Against what many have supposed, quantum information can be clearly defined (it is not a primitive or vague notion) but it is not part of the material contents of the world. Timpson's account sheds light on the nature of nonlocality and information flow in the presence of entanglement and, in particular, dissolves puzzles surrounding the remarkable process of quantum teleportation. In addition it permits a clear view of what the ontological and methodological lessons provided by quantum information theory are; lessons which bear on the gripping question of what role a concept like information has to play in fundamental physics. Topics discussed include the slogan 'Information is Physical', the prospects for an informational immaterialism (the view that information rather than matter might fundamentally constitute the world), and the status of the Church-Turing hypothesis in light of quantum computation. -/- With a clear grasp of the concept of information in hand, Timpson turns his attention to the pressing question of whether advances in quantum information theory pave the way for the resolution of the traditional conceptual problems of quantum mechanics: the deep problems which loom over measurement, nonlocality and the general nature of quantum ontology. He marks out a number of common pitfalls to be avoided before analysing in detail some concrete proposals, including the radical quantum Bayesian programme of Caves, Fuchs, and Schack. One central moral which is drawn is that, for all the interest that the quantum information-inspired approaches hold, no cheap resolutions to the traditional problems of quantum mechanics are to be had. (shrink)

The Bayesian approach to quantum mechanics of Caves, Fuchs and Schack is presented. Its conjunction of realism about physics along with anti-realism about much of the structure of quantum theory is elaborated; and the position defended from common objections: that it is solipsist; that it is too instrumentalist; that it cannot deal with Wigner's friend scenarios. Three more substantive problems are raised: Can a reasonable ontology be found for the approach? Can it account for explanation in quantum theory? Are subjective (...) probabilities on their own adequate in the quantum domain? The first question is answered in the affirmative, drawing on elements from Nancy Cartwright's philosophy of science. The second two are not: it is argued that these present outstanding difficulties for the project. A quantum Bayesian version of Moore's paradox is developed to illustrate difficulties with the subjectivist account of pure state assignments. (shrink)

This paper surveys some of the questions that arise when we consider how entanglement and relativity are related via the notion of non-locality. We begin by reviewing the role of entangled states in Bell inequality violation and question whether the associated notions of non-locality lead to problems with relativity. The use of entanglement and wavefunction collapse in Einstein's famous incompleteness argument is then considered, before we go on to see how the issue of non-locality is transformed if one considers quantum (...) mechanics without collapse to be a complete theory, as in the Everett interpretation. (shrink)

Whilst a straightforward consequence of the formalism of non-relativistic quantum mechanics, the phenomenon of quantum teleportation has given rise to considerable puzzlement. In this paper, the teleportation protocol is reviewed and these puzzles dispelled. It is suggested that they arise from two primary sources: (1) the familiar error of hypostatizing an abstract noun (in this case, ‘information’) and (2) failure to differentiate interpretation dependent from interpretation independent features of quantum mechanics. A subsidiary source of error, the simulation fallacy, is also (...) identified. The resolution presented of the puzzles of teleportation illustrates the benefits of paying due attention to the logical status of ‘information’ as an abstract noun. Introduction The quantum teleportation protocol 2.1 Some information-theoretic aspects of teleportation 2.1.1 Preamble 2.1.2Application to teleportation The puzzles of teleportation Resolving (dissolving) the problem 4.1 The simulation fallacy The teleportation process under different interpretations 5.1 Collapse interpretations:Dirac/von Neumann, GRW 5.2 No collapse and no extra values: Everett 5.3 No collapse, but extra values: Bohm 5.3.1 A note on active information 5.4 Ensemble and statistical viewpoints Concluding remarks. (shrink)

What ontology does realism about the quantum state suggest? The main extant view in contemporary philosophy of physics is wave-function realism . We elaborate the sense in which wave-function realism does provide an ontological picture, and defend it from certain objections that have been raised against it. However, there are good reasons to be dissatisfied with wave-function realism, as we go on to elaborate. This motivates the development of an opposing picture: what we call spacetime state realism , a view (...) which takes the states associated to spacetime regions as fundamental. This approach enjoys a number of beneficial features, although, unlike wave-function realism, it involves non-separability at the level of fundamental ontology. We investigate the pros and cons of this non-separability, arguing that it is a quite acceptable feature, even one which proves fruitful in the context of relativistic covariance. A companion paper discusses the prospects for combining a spacetime-based ontology with separability, along lines suggested by Deutsch and Hayden. (shrink)

The distinction between proper and improper mixtures is a staple of the discussion of foundational questions in quantum mechanics. Here we note an analogous distinction in the context of the theory of entanglement. The terminology of `proper' versus `improper' separability is proposed to mark the distinction.

In <em>Phys. Rev. A</em> <strong>63</strong> 022113 (2001), Brukner and Zeilinger claim that the Shannon information is not well defined as a measure of information in quantum mechanics, adducing arguments that seek to show that it is inextricably tied to classical notions of measurement. It is shown here that these arguments do not succeed: the Shannon information does not have problematic ties to classical concepts. In a further argument, Brukner and Zeilinger compare the Shannon information unfavourably to their preferred information measure, (...) I(p), with regard to the definition of a notion of `total information content'. This argument is found unconvincing and the relationship betwen measures of information and notions of `total information content' investigated. (shrink)

Deutsch and Hayden claim to have provided an account of quantum mechanics which is particularly local, and which clarifies the nature of information transmission in entangled quantum systems. In this paper, a perspicuous description of their formalism is offered and their claim assessed. It proves essential to distinguish, as Deutsch and Hayden do not, between two ways of interpreting the formalism. On the first, conservative, interpretation, no benefits with respect to locality accrue that are not already available on either an (...) Everettian or a statistical interpretation; and the conclusions regarding information flow are equivocal. The second, ontological, interpretation, offers a framework with the novel feature that global properties of quantum systems are reduced to local ones; but no conclusions follow concerning information flow in more standard quantum mechanics. (shrink)

Between 1964 and 1990, the notion of nonlocality in Bell's papers underwent a profound change as his nonlocality theorem gradually became detached from quantum mechanics, and referred to wider probabilistic theories involving correlations between separated beables. The proposition that standard quantum mechanics is itself nonlocal became divorced from the Bell theorem per se from 1976 on, although this important point is widely overlooked in the literature. In 1990, the year of his death, Bell would express serious misgivings about the mathematical (...) form of the local causality condition, and leave ill-defined the issue of the consistency between special relativity and violation of the Bell-type inequality. In our view, the significance of the Bell theorem, both in its deterministic and stochastic forms, can only be fully understood by taking into account the fact that a fully Lorentz-covariant version of quantum theory, free of action-at-a-distance, can be articulated in the Everett interpretation. (shrink)

'Correlations without correlata' is an influential way of thinking of quantum entanglement as a form primitive correlation which nonetheless maintains locality of quantum theory. A number of arguments have sought to suggest that such a view leads either to internal inconsistency or to conflict with the empirical predictions of quantum mechanics. Here wew explicate and provide a partial defence of the notion, arguing that these objections import unwarranted conceptions of correlation properties as hidden variables. A more plausible account sees the (...) properties in terms of Everettian relative states. The ontological robustness of entanglement is also defended from recent objections. (shrink)

Recently, Brukner and Zeilinger have presented a number of arguments suggesting that the Shannon information is not well defined as a measure of information in quantum mechanics. If established, this result would be highly significant, as the Shannon information is fundamental to the way we think about information not only in classical but also in quantum information theory. On consideration, however, these arguments are found unsuccessful; I go on to suggest how they might be arising as a consequence of Zeilinger`s (...) proposed foundational principle for quantum mechanics. (shrink)

Deutsch and Hayden have proposed an alternative formulation of quantum mechanics which is completely local. We argue that their proposal must be understood as having a form of ‘gauge freedom’ according to which mathematically distinct states are physically equivalent. Once this gauge freedom is taken into account, their formulation is no longer local.

In a comparison of the principles of special relativity and of quantum mechanics, the former theory is marked by its relative economy and apparent explanatory simplicity. A number of theorists have thus been led to search for a small number of postulates - essentially information theoretic in nature - that would play the role in quantum mechanics that the relativity principle and the light postulate jointly play in Einstein's 1905 special relativity theory. The purpose of the present paper is to (...) resist this idea, at least in so far as it is supposed to reveal the fundamental form of the theory. It is argued that the methodology of Einstein's 1905 theory represents a victory of pragmatism over explanatory depth; and that its adoption only made sense in the context of the chaotic state state of physics at the start of the 20th century - as Einstein well knew. (shrink)

No More Dying: The Conquest of Aging and the Extension of Human Life. By Joel Kurtzman and Phillip Gordon. Prolongevity. By Albert Rosenfeld.

Plausible (eikotic) reasoning known from ancient Greek (late Academic) skeptical philosophy is shown to be a clear notion that can be analyzed by argumentation methods, and that is important for argumentation studies. It is shown how there is a continuous thread running from the Sophists to the skeptical philosopher Carneades, through remarks of Locke and Bentham on the subject, to recent research in artificial intelligence. Eleven characteristics of plausible reasoning are specified by analyzing key examples of it recognized as important (...) in ancient Greek skeptical philosophy using an artificial intelligence model called the Carneades Argumentation System (CAS). By applying CAS to ancient examples it is shown how plausible reasoning is especially useful for gaining a better understanding of evidential reasoning in law, and argued that it can also be applied to everyday argumentation. Our analysis of the snake and rope example of Carneades is also used to point out some ways CAS needs to be extended if it is to more fully model the views of this ancient philosopher on argumentation. (shrink)

The disclosure of prognosis to terminally ill patients has emerged as a recent concern given greater demands for patient involvement in medical decision‐making in the United States. As part of the informed consent process, American physicians are legally and ethically obligated to provide information to such patients about the risks, benefits, and alternatives of all available treatment options including the use of experimental therapies. Although not legally required, the disclosure of a terminal prognosis is ethically justified because it upholds the (...) principle of self‐determination and enables patients to make treatment decisions consistent with their life goals. To understand oncologists’ attitudes about disclosing prognostic information to cancer patients with advanced disease, we interviewed fourteen oncologists and conducted one focus group of medical fellows. Although oncologists reported to disclose prognosis in terms of cancer not being curable, they tend to avoid using percentages to convey prognosis. Oncologists’ reported reluctance to disclosing prognosis was conveyed through the use of metaphors depicting the perceived violent impact of such information on patients. Oncologists’ reluctance to disclose prognosis and preserve patient hope are held in check by their need to ensure that patients have ‘realistic expectations’ about therapy. We discuss these data in light of the cultural, ethical, and legal dimensions of prognosis disclosure, patient hope and the doctor–patient relationship, and recommend ways to enhance the communication process. (shrink)

(2013). Multiple paths to transfer and constraint relaxation in insight problem solving. Thinking & Reasoning: Vol. 19, No. 1, pp. 96-136. doi: 10.1080/13546783.2012.742852.

Transcription is a fundamental cellular process and the first step in gene regulation. Although RNA polymerase (RNAP) is highly processive, in growing cells the progression of transcription can be hindered by obstacles on the DNA template, such as damaged DNA. The authors recent findings highlight a trade‐off between transcription fidelity and DNA break repair. While a lot of work has focused on the interaction between transcription and nucleotide excision repair, less is known about how transcription influences the repair of DNA (...) breaks. The authors suggest that when the cell experiences stress from DNA breaks, the control of RNAP processivity affects the balance between preserving transcription integrity and DNA repair. Here, how the conflict between transcription and DNA double‐strand break (DSB) repair threatens the integrity of both RNA and DNA are discussed. In reviewing this field, the authors speculate on cellular paradigms where this equilibrium is well sustained, and instances where the maintenance of transcription fidelity is favored over genome stability. (shrink)

The essays in this book engage the original and controversial claims from Michael Boylan's A Just Society. Each essay discusses Boylan's claims from a particular chapter and offers a critical analysis of these claims. Boylan responds to the essays in his lengthy and philosophically rich reply.

The authors examine the internal and external motivating factors behind the actions of the House Committee on Ethics members by looking at the procedural efficiency of the Committee on Ethics (or lack thereof), as a natural consequence of the committee members' implicit public policy actions.

During the set-up phase of an international study of genetic influences on outcomes from sepsis, we aimed to characterise potential differences in ethics approval processes and outcomes in participating European countries. Between 2005 and 2007 of the FP6-funded international Genetics Of Sepsis and Septic Shock project, we asked national coordinators to complete a structured survey of research ethic committee approval structures and processes in their countries, and linked these data to outcomes. Survey findings were reconfirmed or modified in 2017. Eighteen (...) countries participated in the study, recruiting 2257 patients from 160 ICUs. National practices differed widely in terms of composition of RECs, procedures and duration of the ethics approval process. Eight countries used a single centralised process for approval, seven required approval by an ethics committee in each participating hospital, and three required both. Outcomes of the application process differed widely between countries because of differences in national legislation, and differed within countries because of interpretation of the ethics of conducting research in patients lacking capacity. The RECs in four countries had no lay representation. The median time from submission to final decision was 1.5 months; in nine approval was received within 1 month; six took over 6 months, and in one 24 months; had all countries been able to match the most efficient approvals processes, an additional 74 months of country or institution-level recruitment would have been available. In three countries, rejection of the application by some local RECs resulted in loss of centres; and one country rejected the application outright. The potential benefits of the single application portal offered by the European Clinical Trials Regulation will not be realised without harmonisation of research ethics committee practices as well as national legislation. (shrink)

This paper describes the application of eight statistical and machine-learning methods to derive computer models for predicting mortality of hospital patients with pneumonia from their findings at initial presentation. The eight models were each constructed based on 9847 patient cases and they were each evaluated on 4352 additional cases. The primary evaluation metric was the error in predicted survival as a function of the fraction of patients predicted to survive. This metric is useful in assessing a model’s potential to assist (...) a clinician in deciding whether to treat a given patient in the hospital or at home. We examined the error rates of the models when predicting that a given fraction of patients will survive. We examined survival fractions between 0.1 and 0.6. Over this range, each model’s predictive error rate was within 1% of the error rate of every other model. When predicting that approximately 30°K of the patients will survive, all the models have an error rate of less than 1.5%. The models are distinguished more by the number of variables and parameters that they contain than by their error rates; these differences suggest which models may be the most amenable to future implementation as paper-based guidelines. (shrink)

Christopher Hill and Joseph Levine have argued that the conceivabilities involved in anti-materialist arguments are defeated as evidence of possibility. Their strategy assumes the following principle: the conceivability of a state of affairs S constitutes evidence for the possibility of S only if the possibility of S is the best explanation of the conceivability of S. So if there is a better explanation of the conceivability of S than its possibility, then the conceivability of S is thereby defeated as (...) evidence of possibility. Hill and Levine proceed to offer alternative explanations of these conceivabilities, concluding that these conceivabilities are thereby defeated as evidence. However, this strategy fails because their explanations generalize to all conceivability judgments concerning phenomenal states. Consequently, one could defend absolutely any theory of phenomenal states against conceivability arguments in just this way. This result conflicts with too many of our common sense beliefs about the evidential value of conceivability with respect to phenomenal states. The general moral is that the application of such principles of explanatory defeat is neither simple nor straightforward. (shrink)

Robert Gordon’s trip to the Mogok ruby mines in northern Burma, as reported in his testament to the Royal Geographical Society in 1888, represents one of the most blatant uses of travel as empire building in the Mekong Region. While European explorers and adventurers had been travelling to and along the region for centuries, most had been intent on mapping, surveying and categorizing its contents for purposes of their own profit, in one way or another. Gordon, while of (...) course not unmindful of his own career, represents the traveller aiming to be of service to the greater power. He was strongly motivated by the desire to bring the ruby mines of Mogok into the reach of the British Empire through the building of a railway and the necessary infrastructure to pacify the countryside and its people, thereby enabling the enclosure of another type of commons. (shrink)

Spätestens mit dem Aufkommen der modernen Naturwissenschaften im 19. Jahrhundert wird die Rolle der Metaphysik für die naturwissenschaftliche Begriffsbildung in Frage gestellt. Bereits Kant identifiziert die Schwächen einer Metaphysik, die in ihren wesentlichen Begriffen allein dem aristotelischen Vorbild treu geblieben ist. Das heißt aber nicht, dass bewährte traditionelle metaphysische Begriffe völlig aufgegeben werden müssen. Gerade in den modernen Naturwissenschaften gibt es Fragen, die aus der einzelnen Wissenschaft heraus nicht beantwortet werden können, ohne begriffliche Anleihen bei traditionellen metaphysischen Konzepten zu nehmen. (...) Anhand der metaphysischen und naturphilosophischen Konzeptionen Kants und Whiteheads untersucht Gordon Seitz den von Whitehead behaupteten Gegensatz zwischen Prozess- und Transzendentalphilosophie im Hinblick auf die Idee einer Einheit der Natur und unter Berücksichtigung moderner naturwissenschaftlicher Theorien. (shrink)

Radulphus Brito's Quaestiones super Priora analytica Aristotelis is a major work written in the early 1300s which treated Aristotle's text devoted to the theory of the syllogism. Brito, one of the most influential of the group of medieval thinkers known as the Modistae, examines both categorical and hypothetical syllogisms. In the text offered here, based on six known manuscripts which are complete or nearly complete, Brito was critical of many of the theories of his contemporary, Simon of Faversham. Brito edited (...) his work several times; there are at least two versions which indicate Brito returned to this material during his long career at the university in Paris. This volume is the first critical text edition of Brito's Quaestiones super Priora analytica Aristotelis and will therefore be of great interest to those studying the history of logic and its development during the medieval period. (shrink)

"No matter who you are or what you aim to achieve, power determines whether you succeed or fail. But while power dynamics permeate every interaction in the workplace, the concept is very poorly understood or managed in practice. Everyone has influence over some people and is under the influence of others, and must choose how to deal with these realities in daily interactions. This book offers a comprehensive and applied understanding of power in a professional scenario: where it comes from, (...) how it moves and what that means in practice for how professionals work together. Drawing on numerous recent case studies, this book offers a toolbox that anyone can apply, including explanations of the different forms of power, the two ways power can move between parties, the perils of power, how to create accountability, the intersection of power and ethics, and tools for maintaining power relationships with both superiors and subordinates. It provides employers and employees alike the means to understand, manage, and exert the power necessary to control their own circumstances."-Provided by publisher. (shrink)

With his insightful and wide-ranging theory of recognition, Axel Honneth has decisively reshaped the Frankfurt School tradition of critical social theory. Combining insights from philosophy, sociology, psychology, history, political economy, and cultural critique, Honneth’s work proposes nothing less than an account of the moral infrastructure of human sociality and its relation to the perils and promise of contemporary social life. This book provides an accessible overview of Honneth’s main contributions across a variety of fields, assessing the strengths and weaknesses of (...) his thought. Christopher Zurn clearly explains Honneth’s multi-faceted theory of recognition and its relation to diverse topics: individual identity, morality, activist movements, progress, social pathologies, capitalism, justice, freedom, and critique. In so doing, he places Honneth’s theory in a broad intellectual context, encompassing classic social theorists such as Kant, Hegel, Marx, Freud, Dewey, Adorno and Habermas, as well as contemporary trends in social theory and political philosophy. Treating the full range of Honneth’s corpus, including his major new work on social freedom and democratic ethical life, this book is the most up-to-date guide available. _Axel Honneth_ will be invaluable to students and scholars working across the humanities and social sciences, as well as anyone seeking a clear guide to the work of one of the most influential theorists writing today. (shrink)

This article provides a methodology for the interpretation of AI ethics principles to specify ethical criteria for the development and deployment of AI systems in high-risk domains. The methodology consists of a three-step process deployed by an independent, multi-stakeholder ethics board to: (1) identify the appropriate level of abstraction for modelling the AI lifecycle; (2) interpret prescribed principles to extract specific requirements to be met at each step of the AI lifecycle; and (3) define the criteria to inform purpose- and (...) context-specific balancing of the principles. The methodology presented in this article is designed to be agile, adaptable, and replicable, and when used as part of a pro-ethical institutional culture, will help to foster the ethical design, development, and deployment of AI systems. The application of the methodology is illustrated through reference to the UK Ministry of Defence AI ethics principles. (shrink)

Political epistemology is the intersection of political philosophy and epistemology. This paper develops a political 'hinge' epistemology. Political hinge epistemology draws on the idea that all belief systems have fundamental presuppositions which play a role in the determination of reasons for belief and other attitudes. It uses this core idea to understand and tackle political epistemological challenges, like political disagreement, polarization, political testimony, political belief, ideology, and biases, among other possibilities. I respond to two challenges facing the development of a (...) political hinge epistemology. The first is about nature and demarcation of political hinges, while the second is about rational deliberation over political hinges. I then use political hinge epistemology to analyze ideology, dealing with the challenge of how an agent's ideology 'masks' or distorts their understanding of social reality, along with the challenge of how ideology critique can change the beliefs of agents who adhere to dominant ideologies, if agents only have their own or the competing ideology to rely on (see Haslanger 2017). I then explore how political hinge epistemology might be extended to further our understanding of political belief polarization. (shrink)

Plato's dialogues are usually understood as simple examples of philosophy in action. In this book Professor Rowe treats them rather as literary-philosophical artefacts, shaped by Plato's desire to persuade his readers to exchange their view of life and the universe for a different view which, from their present perspective, they will barely begin to comprehend. What emerges is a radically new Plato: a Socratic throughout, who even in the late dialogues is still essentially the Plato (and the Socrates) of the (...) Apology and the so-called 'Socratic' dialogues. This book aims to understand Plato both as a philosopher and as a writer, on the assumption that neither of these aspects of the dialogues can be understood without the other. The argument of the book is closely based in Plato's text, but should be accessible to any serious reader of Plato, whether professional philosopher, classicist, or student. (shrink)