R.I.G Hughes offers the first detailed and accessible analysis of the Hilbert-space models used in quantum theory and explains why they are so successful.

Modal propositional logic; Modal predicate logic; A survey of modal logic.

Normal propositional modal systems This first chapter has two main aims. One is to give a general account of the propositional modal systems that we shall ...

This is an opinionated guide to the literature on epistemic dilemmas. It discusses seven kinds of situations where epistemic dilemmas appear to arise; dilemmic, dilemmish, and non-dilemmic takes on them; and objections to dilemmic views along with dilemmist’s replies to them.

Hughes approaches his subjects, as he later did with pertinent issues of the twentieth-century, with both reason and compassion.This edition includes an elegant ...

Steve Awodey and Jesse Hughes. The Coalegebraic Dual of Birkoff's Variety Theorem.

Epistemologists often appeal to the idea that a normative theory must provide useful, usable, guidance to argue for one normative epistemology over another. I argue that this is a mistake. Guidance considerations have no role to play in theory choice in epistemology. I show how this has implications for debates about the possibility and scope of epistemic dilemmas, the legitimacy of idealisation in Bayesian epistemology, uniqueness versus permissivism, sharp versus mushy credences, and internalism versus externalism.

I consider a number of reasons one might think we should only accept epistemic dilemmas in our normative epistemology as a last resort and argue that none of them is compelling.

Originally published in 1965. This is a textbook of modern deductive logic, designed for beginners but leading further into the heart of the subject than most other books of the kind. The fields covered are the Propositional Calculus, the more elementary parts of the Predicate Calculus, and Syllogistic Logic treated from a modern point of view. In each of the systems discussed the main emphases are on Decision Procedures and Axiomatisation, and the material is presented with as much formal rigour (...) as is compatible with clarity of exposition. The techniques used are not only described but given a theoretical justification. Proofs of Consistency, Completeness and Independence are set out in detail. The fundamental characteristics of the various systems studies, and their relations to each other are established by meta-logical proofs, which are used freely in all sections of the book. Exercises are appended to most of the chapters, and answers are provided. (shrink)

Epistemologists spend a great deal of time thinking about how we should respond to our evidence. They spend far less time thinking about the ways that evidence can be acquired in the first place. This is an oversight. Some ways of acquiring evidence are better than others. Many normative epistemologies struggle to accommodate this fact. In this article I develop one that can and does. I identify a phenomenon – epistemic feedback loops – in which evidence acquisition has gone awry, (...) with the result that even beliefs based on the evidence are irrational. Examples include evidence acquired under the influence of confirmation bias and evidence acquired under the influence of cognitively penetrated experiences caused by implicit bias. I then develop a theoretical framework which enables us to understand why beliefs that are the outputs of epistemic feedback loops are irrational. Finally, I argue that many popular approaches to epistemic normativity may need to be abandoned on the grounds that they cannot comfortably explain feedback loops. The scope of this last claim is broad: it includes almost all contemporary theories of justified/rational belief and of the epistemology of cognitive penetration. (shrink)

It is necessary that, if the world is divided into nations, conflicts should arise in which there is no strong argument against terrorism or repression. By a strong argument I mean one that would sway all minds not blindly partisan, without moral commitments that are unusual or outlandish in the modern world and with as much aversion to violence as most people have. So I do not here consider, because it is unusual, heroic and absolute pacifism, much as I respect (...) it; on the other hand I do mention Christian moral objections applying specially to terrorism because it seems somewhat outlandish even now to ignore the Christian element in our tradition. (shrink)

I argue that evidentialism should be rejected because it cannot be reconciled with empirical work on bias in cognitive and social psychology.

(1998). Forgetful all too Forgetful: Nietzsche and the Question of Measure. Journal of the British Society for Phenomenology: Vol. 29, No. 3, pp. 252-267.

Dementia affects millions of people throughout the world. Thinking through Dementia offers a critique of the main models used to understand dementia-the biomedical, neuropsychological, and social constructionist. It discusses clinical issues and cases, together with philosophical work that might help us to better understand and treat this illness.

Recently it has been increasingly popular to argue that knowledge is the norm of belief. I present an argument against this view. The argument trades on the epistemic situation of the subject in the bad case. Notably, unlike with other superficially similar arguments against knowledge norms, knowledge normers preferred strategy of appealing to the distinction between permissibility and excusability cannot help them to rebut this argument.

Theology in the modern era often assumes that the consummate form of theological discourse is objective prose—ignoring or condemning apophatic traditions and the spiritual eros that drives them. For too long, Kierkegaard has been read along these lines as a progenitor of twentieth-century neo-orthodoxy and a stern critic of the erotic in all its forms. In contrast, Hughes argues that Kierkegaard envisions faith fundamentally as a form of infinite, insatiable eros. He depicts the essential purpose of Kierkegaard’s writing as (...) to elicit ever-greater spiritual desire, not to provide the satisfactions of doctrine or knowledge. -/- Hughes’s argument revolves around close readings of provocative, disparate, and (in many cases) little-known Kierkegaardian texts. The thread connecting all of these texts is that they each conjure up some sort of performative “stage setting,” which they invite readers to enter. By analyzing the theological function of these texts, the book sheds new light on the role of the aesthetic in Kierkegaard’s authorship, his surprising affinity for liturgy and sacrament, and his overarching effort to conjoin eros for God with this-worldly love. (shrink)

Does the content of a physically dangerous job affect the moral permissibility of hiring for that job? To what extent may employers consider costs in choosing workplace safety measures? Drawing on Kantian ethical theory, this article defends two strong ethical standards of workplace safety. First, the content of a hazardous job does indeed affect the moral permissibility of offering it. Unless employees need hazard pay to meet basic needs, it is permissible to offer a dangerous job only if prospective employees (...) have a reason other than hazard pay to choose this job instead of safer alternatives. Second, employers typically cannot justify omitting expensive safety measures by paying employees more, even if employees prefer higher pay to greater safety. Employers offering dangerous jobs must meet these two standards to avoid treating their employees merely as means. (shrink)

Christopher Hughes; XII*—Is A Thing Just The Sum Of Its Parts?, Proceedings of the Aristotelian Society, Volume 86, Issue 1, 1 June 1986, Pages 213–234, https:/.

Disturbances to one's sense of self, the feeling that one has ‘lost a part of oneself’ or that one ‘no longer feels like oneself,’ are frequently recounted throughout the bereavement literature. Engaging Allan Køster's important contribution to this issue, this article reinforces his suggestion that, by rupturing the existential texture of self-familiarity, bereavement can result in experiences of estrangement that can be meaningfully understood according to the concept of self-alienation. Nevertheless, I suggest that whilst Køster's relational interpretation of alienation as (...) the withdrawal of heteronomy can be applied to the experience of world-collapse in bereavement, what sets bereavement apart from other limit situations is the fact that it involves an intersubjective relation between the living and the dead. In contrast to Køster, therefore, I suggest that the experience of self-alienation that is distinctive to bereavement results from the fact that the bereaved is exposed to, and co-opted by, the absolute alterity of death itself. (shrink)

Drawing on resources from both the Analytical and Continental traditions, Form and World argues that a comprehension of Kant's aesthetics is necessary for grasping the scope and force of his epistemology. Fiona Hughes draws on phenomenological and aesthetic resources to bring out the continuing relevance of Kant's project. One of the difficulties faced in reading the Critique of Pure Reason is finding a way of reading the text as one continuous discussion. This book offers a reading at each stage (...) of Kant's epistemological argument, showing how various elements of Kant's argument, often thought of as extraneous or indefensible, can be integrated. This incisive study, arguing for the centrality of aesthetics in philosophy, and within experience in general, challenges a blind spot in the Anglo-American tradition of philosophy and will contribute to a growing interest in the general significance of aesthetic culture. (shrink)

The author explores the connection between morality and principles of critical thinking as a way to encourage students to take ethic and moral concepts seriously in introductory courses. The skeptical attitude of students in introductory courses often hampers students critically engaging with questions of morality. Moral values and judgments are only valid for students if contextualized in historical epochs or cultures, and often are conceived as opinions. The author examines Bishop Butler's moral theory and argues for its incorporation into the (...) introductory philosophy curriculum. Butler’s moral theory introduces students to philosophical method and moral reasoning, which the author argues counteracts students’ initial skeptical responses to ethical and moral theory. Butler’s theory demonstrates the importance of the clarification of terms, connections between thought and truth, and the overall importance of philosophical argumentation in moral theory. (shrink)

When a loved one dies, it is common for the bereaved to feel profoundly lonely, disconnected from the world with the sense that they no longer belong. In philosophy, this experience of ‘loss and loneliness’ has been interpreted according to both a loss of possibilities and a loss of the past. But it is unclear how these interpretations apply to the distinctive way in which loss and loneliness manifest in old age. Drawing on the phenomenological analyses of old age given (...) by de Beauvoir and Améry, I consider how the diminishment of the capacity for projection and recollection complicate recent interpretations of loss and loneliness, whilst nevertheless reinforcing the conclusion that in old age subjectivity is necessarily impoverished. Developing a critical stance on de Beauvoir and Améry’s underlying conception of subjectivity, I turn to Levinas in considering whether or not there is a way to reimagine subjectivity such that the estrangement and alienation of older adults might be ameliorated rather than exacerbated. Grounded in the passive body-in-itself rather than the self-transcending capacity of the body-for-itself, I suggest it becomes possible to reconceptualise the experience of loss and loneliness in old age; both in terms of what is lost and what needs to be restored if older adults are to be helped to find themselves at home in the world in the midst of, and indeed because of, manifold loss. (shrink)

The utterance “I am humble” is thought to be paradoxical because a speaker implies that they know they are virtuous or reveals an aim to impress others – a decidedly non-humble aim. Such worries lead to the seemingly absurd conclusion that a humble person cannot properly assert that they are humble. In this paper, I reconstruct and evaluate three purported paradoxes of humility concerning its self-attribution, knowledge and belief about our own virtue, and humility's value. I argue that humility is (...) not genuinely paradoxical and that these puzzles do not have meaningful implications for its conceptual analyses. I instead offer error theoretical explanations of humility's apparent paradoxicality. (shrink)

Melancholia is an attunement of despair and despondency that can involve radical disruptions to temporal experience. In this article, I extrapolate from the existing analyses of melancholic time to examine some of the important existential implications of these temporal disruptions. In particular, I focus on the way in which the desynchronization of melancholic time can complicate the melancholic’s relation to death and, consequently, to the meaning and significance of their life. Drawing on Heidegger’s distinction between death and demise, I argue (...) that melancholic time leaves the melancholic in an impossible state of existing, where they are both unable to live and unable to die. Turning to the role of the physician, I consider the significant role that clinical interventions might have in resynchronizing the melancholic with time and examine these ideas further through a case study on physician-assisted suicide. In so doing, I demonstrate that the desynchronization of melancholic time should indeed be understood as a matter of life and death. (shrink)

There has been considerable work on practical reasoning in artificial intelligence and also in philosophy. Typically, such reasoning includes premises regarding means–end relations. A clear semantics for such relations is needed in order to evaluate proposed syllogisms. In this paper, we provide a formal semantics for means–end relations, in particular for necessary and sufficient means–end relations. Our semantics includes a non-monotonic conditional operator, so that related practical reasoning is naturally defeasible. This work is primarily an exercise in conceptual analysis, aimed (...) at clarifying and eventually evaluating existing theories of practical reasoning (pending a similar analysis regarding desires, intentions and other relevant concepts). (shrink)

Hyman (1999, 2006) argues that knowledge is best conceived as a kind of ability: S knows that p iff S can φ for the reason that p. Hyman motivates this thesis by appealing to Gettier cases. I argue that it is counterexampled by a certain kind of Gettier case where the fact that p is a cause of the subject’s belief that p. One can φ for the reason that p even if one does not know that p. So knowledge (...) is not best conceived as an ability of this kind. (shrink)

Increasingly the body is a possession that does not belong to us. It is bought and sold, bartered and stolen, marketed wholesale or in parts. The professions - especially reproductive medicine, transplant surgery, and bioethics but also journalism and other cultural specialists - have been pliant partners in this accelerating commodification of live and dead human organisms. Under the guise of healing or research, they have contributed to a new 'ethic of parts' for which the divisible body is severed from (...) the self, torn from the social fabric, and thrust into commercial transactions -- as organs, secretions, reproductive capacities, and tissues -- responding to the dictates of an incipiently global marketplace. Breaking with established approaches which prioritize the body as 'text', the chapters in this book examine not only images of the body-turned-merchandise but actually existing organisms considered at once as material entities, semi-magical tokens, symbolic vectors and founts of lived experience. The topics covered range from the cultural disposal and media treatment of corpses, the biopolitics of cells, sperm banks and eugenics, to the international trafficking of kidneys, the development of 'transplant tourism', to the idioms of corporeal exploitation among prizefighters as a limiting case of fleshly commodity. This insightful and arresting volume combines perspectives from anthropology, law, medicine, and sociology to offer compelling analyses of the concrete ways in which the body is made into a commodity and how its marketization in turn remakes social relations and cultural meanings. (shrink)