How the visual systems of different species enable them to detect and discriminate colour patterns and how such visual abilities contribute to their survival is discussed. The influence of evolutionary and environmental pressures on both perceptual capacity and colour trait production is to be considered. Visual systems with different functional anatomy have evolved in response to such pressures.

In this impressive second edition of Theory of Knowledge, Keith Lehrer introduces students to the major traditional and contemporary accounts of knowing. Beginning with the traditional definition of knowledge as justified true belief, Lehrer explores the truth, belief, and justification conditions on the way to a thorough examination of foundation theories of knowledge,the work of Platinga, externalism and naturalized epistemologies, internalism and modern coherence theories, contextualism, and recent reliabilist and causal theories. Lehrer gives all views careful examination and concludes (...) that external factors must be matched by appropriate internal factors to yield knowledge. This match of internal and external factors follows from Lehrer’s new coherence theory of undefeated justification. In addition to doing justice to the living epistemological traditions, the text smoothly integrates several new lines that will interest scholars. Also, a feature of special interest is Lehrer’s concept of a justification game.This second edition of Theory of Knowledge is a thoroughly revised and updated version that contains several completely new chapters. Written by a well-known scholar and contributor to modern epistemology, this text is distinguished by clarity of structure, accessible writing, and an elegant mix of traditional material, contemporary ideas, and well-motivated innovation. (shrink)

This book is about one of the most baffling of all paradoxes – the famous Liar paradox. Suppose we say: 'We are lying now'. Then if we are lying, we are telling the truth; and if we are telling the truth we are lying. This paradox is more than an intriguing puzzle, since it involves the concept of truth. Thus any coherent theory of truth must deal with the Liar. Keith Simmons discusses the solutions proposed by medieval philosophers and (...) offers his own solutions and in the process assesses other attempts to solve the paradox. Unlike such attempts, Simmons' 'singularity' solution does not abandon classical semantics and does not appeal to the kind of hierarchical view found in Barwise's and Etchemendy's The Liar. Moreover, Simmons' solution resolves the vexing problem of semantic universality – the problem of whether there are semantic concepts beyond the expressive reach of a natural language such as English. (shrink)

The eminent philosopher Keith Lehrer offers an original and distinctively personal view of central aspects of the human condition, such as reason, knowledge, wisdom, autonomy, love, consensus, and consciousness. He argues that what is uniquely human is our capacity for evaluating our own mental states (such as beliefs and desires), and suggests that we have a system for such evaluation which allows the resolution of personal and interpersonal conflict. The keystone in this system is self-trust, on which reason, knowledge, (...) and wisdom are grounded. (shrink)

Nietzsche's vision of the 'overman' continues to haunt the postmodern imagination. His call that 'man is something that must be overcome' can no longer be seen as simple rhetoric. Our experiences of the hybrid realities of artificial life have made the 'transhuman' a figure that looks over us all. Inspired by this vision, Keith Ansell Pearson sets out to examine if evolution is 'out of control' and machines are taking over. In a series of six fascinating perspectives, he links (...) Nietzsche's thought with the issues at stake in contemporary conceptions of evolution from the biological to the technological. _Viroid Life; Perspectives on Nietzsche and the Transhuman Condition_ considers the hybrid, 'inhuman' character of our future with the aid of Nietzsche's philosophy. Keith Ansell Pearson contrasts Nietzsche and Darwin before introducing the more recent figures such as Giles Deleuze and Guy Debord to sketch a new thinking of technics and machines and stress the ambiguous character of our 'machine enslavement'. (shrink)

This book addresses a fundamental question in the philosophy of religion. Can religious experience provide evidence for religious belief? If so, how? Keith Yandell argues against the notion that religious experience is ineffable, while advocating the view that strong numinous experience provides some evidence that God exists. An attractive feature of the book is that it does not confine its attention to any one religious cultural tradition, but tracks the nature of religious experience across different traditions in both the (...) East and the West. (shrink)

This article considers an interpretative model for the study of Heraclitus, which was first put forward by Alexander Mourelatos in 1973, and draws upon a related model put forward by Julius Moravcsik beginning in 1983. I further develop this combined model and provide a motivation for an interpretation of Heraclitus. This is also of interest for modern metaphysics due to the recurrence of structurally similar problems, including the ‘colour exclusion’ problem that was faced by Wittgenstein. Further, I employ the model (...) to shed new light on Heraclitus’ image of the river, while relating potential readings to various contemporary metaphysical views. (shrink)

Informed by the philosophy of the virtual, Keith Ansell Pearson offers up one of the most lucid and original works on the central philosophical questions. He asks that if our basic concepts on what it means to be human are wrong then, what is this to mean for our ideas of time, being, consciousness? A critical examination ensues, one informed by a multitude of responses to a large number of philosophers. Under discussion is the mathematical limits as found in (...) Russell, questions on Relativity, Kant's notion of judgement, Popper, Dennett, Dawkins and Proust. He brings into the rapport the concepts of Bergson and their explosive insights into the idea of time. (shrink)

I offer an examination of a core element in the reflectiveness of Heraclitus’ thought, namely, his rebuke of polymathy . In doing so, I provide a response to a recent claim that Heraclitus should not be considered to be a philosopher, by attending to his paradigmatically philosophical traits. Regarding Heraclitus’ attitude to that naïve form of ‘wisdom’, i.e., polymathy, I argue that he does not advise avoiding experience of many things, rather, he advises rejecting experience of things as merely many (...) independent things in their manifoldness , and, instead, to understand their unity and thereby to unify our knowledge of them. (shrink)

Because every single one of us will die, most of us would like to know what—if anything—awaits us afterward, not to mention the fate of lost loved ones. Given the nearly universal vested interest we personally have in deciding this question in favor of an afterlife, it is no surprise that the vast majority of books on the topic affirm the reality of life after death without a backward glance. But the evidence of our senses and the ever-gaining strength of (...) scientific evidence strongly suggest otherwise. -/- In The Myth of an Afterlife: The Case against Life after Death, Michael Martin and Keith Augustine collect a series of contributions that redress this imbalance in the literature by providing a strong, comprehensive, and up-to-date casebook of the chief arguments against an afterlife all in one place. Divided into four separate sections, this essay collection opens the volume with a broad overview of the issues, as contributors consider the strongest available evidence as to whether or not we survive death—in particular the biological basis of all mental states and their grounding in brain activity that ceases to function at death. Next contributors consider a host of conceptual and empirical difficulties that confront the various ways of "surviving" death—from bodiless minds to bodily resurrection to any form of posthumous survival. Then essayists turn to internal inconsistencies between traditional theological conceptions of an afterlife—Heaven, Hell, karmic rebirth—and widely held ethical principles central to the belief systems undergirding those notions. In the final section, authors offer critical evaluations of the main types of evidence for an afterlife. -/- Fully interdisciplinary, The Myth of an Afterlife: The Case against Life after Death brings together a variety of fields of research to make that case, including cognitive neuroscience, philosophy of mind, personal identity, philosophy of religion, moral philosophy, psychical research, and anomalistic psychology. As the definitive casebook of arguments against life after death, this collection is required reading for any instructor, researcher, and student in philosophy, religious studies, and theology. It is sure to raise provocative issues new to readers, regardless of background, from those who believe fervently in the reality of an afterlife to those who do not or are undecided on the matter. (shrink)

This volume covers the period between the 1890s and 1930s, a period that witnessed revolutions in the arts and society which set the agenda for the rest of the century. In philosophy, the period saw the birth of analytic philosophy, the development of new programmes and new modes of inquiry, the emergence of phenomenology as a new rigorous science, the birth of Freudian psychoanalysis, and the maturing of the discipline of sociology. This period saw the most influential work of a (...) remarkable series of thinkers who reviewed, evaluated and transformed 19th-century thought. A generation of thinkers - among them, Henri Bergson, Emile Durkheim, Sigmund Freud, Martin Heidegger, Edmund Husserl, Karl Jaspers, Max Scheler, and Ludwig Wittgenstein - completed the disenchantment of the world and sought a new re-enchantment. (shrink)

The three main kinds of theory in normative ethics, namely, consequentialism, deontology, and virtue ethics, are often presented as the ‘palette’ from which we may choose, or use as a starting point for an investigation. However, this way of doing ethics and philosophy, by the palette, may be leading some of us astray. It has led some to believe that all that there is to ethics, and to ethics of AI, is given in terms of these already devised petrified categories (...) of theory. It has also led others to abandon normative ethics and philosophy altogether and to resort to descriptive methods that are then used to justify action. I wish to argue that (1) we should not abandon traditional philosophical approaches, but (2a) this does not entail that the petrified palette should constitute the beginning of our philosophical investigations. Further, (2b) I recommend a non-methodological approach in which it is instead radical questions that spur these investigations, which arise through consideration of the practical actions (potential or otherwise) of machines and their programmers. (shrink)

Zygmunt Bauman has always approached sociology as an imagination, as an ongoing conversation with experience rather than a discipline within tight boundaries. This has enabled his work to move outside of the academy, and over the past decade or so he has become a leading public sociologist. But what does this status mean for the practice and possibilities of sociology? In this conversation Bauman reflects on the role, status and opportunities of sociology, who it is for, and what this means (...) for the sociologist. (shrink)

The concept of the 'social Trinity', which posits three conscious subjects in God, radically revised the traditional Christian idea of the Creator. It promoted a view of God as a passionate, creative and responsive source of all being. Keith Ward argues that social Trinitarian thinking threatens the unity of God, however, and that this new view of God does not require a 'social' component. Expanding on the work of theologians such as Barth and Rahner, who insisted that there was (...) only one mind of God, Ward offers a coherent, wholly monotheistic interpretation of the Trinity. Christ and the Cosmos analyses theistic belief in a scientific context, demonstrating the necessity of cosmology to theological thinking that is often overly myopic and anthropomorphic. This important volume will benefit those who seek to understand what the Trinity is, why it matters and how it fits into a scientific account of the universe. (shrink)

Suitable for those conducting research or teaching in philosophy, this title provides analyses of the continental tradition of philosophy from Kant. Placing continental philosophy within a historical context, it helps define what the continental tradition has been and where it is moving.

The concept of care has occupied a central place in nursing philosophy and scholarship since the modern formation of the profession. Perhaps the defining character of the scholarship has been the recognition not only of the complexity of the concept of care, its elusiveness and ambiguity, but also the lack of consensus or agreement regarding its meaning and value. I will make two interconnected arguments: first, I will argue that disputes around care are not an accidental feature or an unfortunate (...) condition of its applicability. Rather, care is an example of what I will call, following W.B. Gallie (1956), an “essentially contested” concept. Secondly, I will employ insights from the French philosopher Henri Bergson (1859‐1941) to explore the concept of care and argue that the essentially contested processual nature of care is the source of its meaning and value. (shrink)

The chapter presents Bergson’s conception of philosophy as a way of life, as a thinking that seeks to make contact with the creativity of life as a whole. This endeavor to alter our vision of the world, and ultimately, our action and sense of being in the world, seeks to operate a “conversion of attention.” For Bergson, such a conversion is tied in with what he calls the “true empiricism” that allows us to experience and think change as that which (...) makes up living reality as a whole. Bergson conceptualizes this move beyond the human in terms of sympathy, a term employed both descriptively, to develop the notion of a sympathetic whole of life in which philosophy as a way of life resituates the self, and prescriptively, as urging us to overcome our estrangement from “the ocean of life” to which we owe our existence. This effort of sympathy takes the form of a spiritual exercise. Not limited to mere contemplation of the world, it transforms the manner in which we perceive the reality of duration and thus opens the path for a different way of living. (shrink)

A consideration of Nietzsche on Epicurean teaching on self-cultivation and making a contrast with Kant on this teaching.

Description: One of the foremost leaders of the devotional revolution which swept through Hindu society in the 15th and 16th centuries was Vallabhacarya. In terms of religion, Vallabhacarya's main contribution was his demonstration of the way in which a human being can shed his or her limited, mortal ego in order to rediscover an eternal individual participation in an unlimited divine being. With regard to literature, some of the earliest prose writing in any form of Hindi was produced by Vallabhacarya's (...) followers in the Caurasi Vaisnavan Ki Varta a collection of accounts of personal efforts to apply the teachings of Vallabhacarya to everyday life. The first part of the Bhakti sect of Vallabhacarya deals with Vallabhacarya's life and with his establishment of an organisation for his followers, a philosophical system to explain his view of the world and a spiritual method for putting his teachings into practice. The second part of the book is made up of an English translation of the sections of the Caurasi Vaisnavan ki Varta describing the lives of four early disciples of Vallabhacarya, one of whom was the poet Suradasa. (shrink)

Some critiques of cybermedicine claim that it is problematic because it fails to create physician–patient relationships. But, electronically mediated encounters do create such relationships. The issue is the nature and quality of those relationships and whether they are conducive to good patient care and meet the ethical ideals and standards of medicine. In this paper, I argue that effective communication and compassion are, in most cases, necessary for the establishment of trusting and morally appropriate physician–patient relationships. The creation of these (...) relationships requires patients and physicians to take psychological and emotional risks and to make commitments to each other. The problem is that by altering the form and content of verbal and non-verbal behaviors and by limiting the kinds of interactions that can take place, cybermedicine makes risk-free interactions easier and more commonplace and retards the development of physician compassion and patient trust. In doing so, cybermedicine encourages morally inappropriate physician–patient relationships. I argue that Merleau-Ponty''s notion of embodiment and Kierkegaard''s criticisms of disinterested reflection help us to understand how cybermedicine can undermine patient health and well being and why it should be seen as a possible threat to the moral integrity of physician–patient relationships. (shrink)

Based on a general review of international, representative tissue banking policies that were described in the medical, ethics, and legal literature, this paper reviews the range of standards, both conceptually and in existing regulations, relevant to four main factors:(1) commercialization, (2) confidentiality, (3) informed consent, and (4) quality of research. These four factors were selected as reflective of some of the major ethical considerations that arise in the conduct of tissue banking research. The authors emphasize that any policy or ethical (...) guidelines designed to regulate tissue bank research should address all four factors. Whenever this sort of research is conducted between several institutions or several countries, the paper suggests that the relevant entities work collaboratively to harmonize their standards. (shrink)

This article interprets Foucault's life-long involvement with transgressive experiences as an art of not being oneself, an effort to escape identity and become other. By bringing together Foucault's own theoretical practices with those drawn from Deleuze and Blanchot, and linking these with biographical material (modes of existence), I show how Foucault's `encounters' with passion and pleasure in film, philosophy, S/M, drugs, the Greeks and suicide amount to an `art of living', an intensification of the power to affect oneself and others (...) in processes of `subjectivation', creating new possibilities of life. This is what Foucault more precisely called an `ethics' - an immanent ethics in which one becomes worthy of what happens to oneself by becoming a work of art. (shrink)

This chapter discusses the nature of software maintenance in light of software’s ontological status. A realist view of software need not commit us to the otiose position that software maintenance is impossible. Many philosophers and computer scientists have been concerned with drawing attention to software’s dual nature, its being both symbolic and physical, abstract and concrete. There are strong connections to be found between this topic and recent investigations in the philosophy of linguistics, particularly the metaphysics of words. It is (...) shown, contra Irmak, that software can be best understood through a realist type-token distinction employing an ontology of composite objects that was put forward by Katz. This approach employs both non-spatiotemporal abstract types and tokens of those types. Further developing Katz’s realist approach can help to make better sense of the dual nature of computational artefacts and their maintenance than the alternatives outlined. Young claims that a prevalent imbalanced view of maintenance as solely conservative is due to a misunderstanding of the nature of artefacts as being realisations of their producers’ intentions. This is a problem for theories of artefacts that employ intentions, such as the one involved with the realist view of software and software maintenance. Software maintenance on this view is not solely conservative but also adaptive and enhancive, constituting a source of counterexamples to Young’s claim. An alternative explanation of the imbalanced view is provided, based on observations by software engineers, especially Sommerville. (shrink)

The issues the commentators have raised and which we address, include: the debate over how attention is allocated during reading; our distinction between early and late stages of lexical processing; our assumptions about saccadic programming; the determinants of skipping and refixations; and the role that higher-level linguistic processing may play in influencing eye movements during reading. In addition, we provide a discussion of model development and principles for evaluating and comparing models. Although we acknowledge that E-Z Reader is incomplete, we (...) maintain that it provides a good framework for systematically trying to understand how the cognitive, perceptual, and motor systems influence the eyes during reading. (shrink)

Throughout all of Deleuze’s work one finds an extended encounter with the Event of Difference. Deleuze’s extraordinary work on Leibniz is no exception. In the ‘later’ work, and regarding Leibniz, Deleuze remarks, “no philosophy has ever pushed to such an extreme the affirmations of one and the same world, and of an infinite difference and variety in this world”. This positive identification with Leibniz is not found in the ‘earlier’ wave of Deleuzian texts from the sixties where Leibniz is captured (...) hesitating over the possible and the virtual. Any such hesitation over the possible and the virtual is “disastrous” for a philosophy of the event and difference since it abolishes the reality of the virtual and subordinates it to the identical, replacing pure immanence with a ‘theological model’ of creation. Is the Leibniz of Deleuze’s early texts compossible with the later? What is the significance of the event of difference or fold that joins and separates Deleuze’s continuing encounter with Leibniz? We will examine what is at stake in these differing understandings of Leibniz to Deleuze’s philosophy of events of difference. (shrink)

Imbalance in analytical legal theory's approach to prima facie legal phenomena : re-balancing after imbalance : an incremental addition to analytical legal theory -- Legal officials, the rule of recognition, and international law -- The hierarchical view of legal system and non-state legality -- Meta-theoretical-evaluative motivations -- An inter-institutional theory -- An inter-institutional account of non-state legality -- Pathologies of legality : novel technologies and their implications for conceptions of legality : the consequences of re-socializing a descriptive-explanatory view of law.

We attempt to defend the species-as-individuals hypothesis by examining the logical role played by the binomials (e.g., "Homo sapiens," "Pinus ponderosa") in biological discourse about species. Those who contend that the binomials can be properly understood as functioning in biological theory as singular terms opt for an objectual account of species and view species as individuals. Those who contend that the binomials can in principle be eliminated from biological theory in favor of predicate expressions opt for a predicative account of (...) species and view species as kinds. We contend that biologists' talk about species is talk about species as individuals, and we conclude that the most plausible account of species is an objectual account. (shrink)

Everyday reasoning requires more evidence than raw data alone can provide. We explore the idea that people can go beyond this data by reasoning about how the data was sampled. This idea is investigated through an examination of premise non-monotonicity, in which adding premises to a category-based argument weakens rather than strengthens it. Relevance theories explain this phenomenon in terms of people's sensitivity to the relationships among premise items. We show that a Bayesian model of category-based induction taking premise sampling (...) assumptions and category similarity into account complements such theories and yields two important predictions: First, that sensitivity to premise relationships can be violated by inducing a weak sampling assumption; and second, that premise monotonicity should be restored as a result. We test these predictions with an experiment that manipulates people's assumptions in this regard, showing that people draw qualitatively different conclusions in each case. (shrink)

Everyday reasoning requires more evidence than raw data alone can provide. We explore the idea that people can go beyond this data by reasoning about how the data was sampled. This idea is investigated through an examination of premise non‐monotonicity, in which adding premises to a category‐based argument weakens rather than strengthens it. Relevance theories explain this phenomenon in terms of people's sensitivity to the relationships among premise items. We show that a Bayesian model of category‐based induction taking premise sampling (...) assumptions and category similarity into account complements such theories and yields two important predictions: First, that sensitivity to premise relationships can be violated by inducing a weak sampling assumption; and second, that premise monotonicity should be restored as a result. We test these predictions with an experiment that manipulates people's assumptions in this regard, showing that people draw qualitatively different conclusions in each case. (shrink)

In recent years there has been an explosion of interest in Artificial Intelligence (AI) both in health care and academic philosophy. This has been due mainly to the rise of effective machine learning and deep learning algorithms, together with increases in data collection and processing power, which have made rapid progress in many areas. However, use of this technology has brought with it philosophical issues and practical problems, in particular, epistemic and ethical. In this paper the authors, with backgrounds in (...) philosophy, maternity care practice and clinical research, draw upon and extend a recent framework for shared decision-making (SDM) that identified a duty of care to the client's knowledge as a necessary condition for SDM. This duty entails the responsibility to acknowledge and overcome epistemic defeaters. This framework is applied to the use of AI in maternity care, in particular, the use of machine learning and deep learning technology to attempt to enhance electronic fetal monitoring (EFM). In doing so, various sub-kinds of epistemic defeater, namely, transparent, opaque, underdetermined, and inherited defeaters are taxonomized and discussed. The authors argue that, although effective current or future AI-enhanced EFM may impose an epistemic obligation on the part of clinicians to rely on such systems' predictions or diagnoses as input to SDM, such obligations may be overridden by inherited defeaters, caused by a form of algorithmic bias. The existence of inherited defeaters implies that the duty of care to the client's knowledge extends to any situation in which a clinician (or anyone else) is involved in producing training data for a system that will be used in SDM. Any future AI must be capable of assessing women individually, taking into account a wide range of factors including women's preferences, to provide a holistic range of evidence for clinical decision-making. (shrink)

Shared decision-making involves health professionals and patients/clients working together to achieve true person-centred health care. However, this goal is infrequently realized, and most barriers are unknown. Discussion between philosophers, clinicians, and researchers can assist in confronting the epistemic and moral basis of health care, with benefits to all. The aim of this paper is to describe what shared decision-making is, discuss its necessary conditions, and develop a definition that can be used in practice to support excellence in maternity care. Discussion (...) between the authors, with backgrounds in philosophy, clinical maternity care, health care management, and maternity care research, assisted the team to confront established norms in maternity care and challenge the epistemic and moral basis of decision-making for caesarean section. The team concluded that shared decision-making must start in pregnancy and continue throughout labour and birth, with equality in discourse facilitated by the clinician. Clinicians have a duty of care for the adequacy of women's knowledge, which can only be fulfilled when relevant knowledge is offered freely and when personal beliefs and biases that may impinge on decision-making (defeaters) are disclosed. Informed consent is not shared decision-making. Key barriers include existing cultural norms of “the doctor knows best” and “patient acquiescence” that prevent defeaters being acknowledged and discussed and can lead to legal challenges, overuse of medical intervention and, in some areas, obstetric violence. Shared decision-making in maternity care can thus be defined as an enquiry by clinician and expectant woman aimed at deciding upon a course of care or none, which takes the form of a dialogue within which the clinician fulfils their duty of care to the client's knowledge by making available their complete knowledge (based on all types of evidence) and expertise, including an exposition of any relevant and recognized potential defeaters. Research to develop measurement tools is required. (shrink)