Successful prototype marine chronometers, developed by Harrison and others in the eighteenth century, stimulated a sector of the British watchmaking industry to supply Admiralty and commercial demand for this instrument. Chronometers, like other British-made timepieces, were constructed by an elaborate pre-industrial method of production. The instrument's static technology and extreme durability meant replacement demand was minimal, and new demand was low relative to existing stock and the industry's capacity. The First World War created a final surge of demand that left (...) supplies far in excess of peacetime needs; and a new technology—radio transmissions of time signals—offered an alternative method of determining Greenwich time, and thus longitude, at sea. (shrink)

Jason Stanley has proposed that we can account for the effects of extralinguistic context on truth-conditional content whilst remaining loyal to a compositional semantics for natural language. This is possible, he argues, because there are covert variables present in the logical forms of certain sentences whose values are fixed relative to contexts, but which do not register in the overt structure of those sentences. In the present article I assess the plausibility of positing such variables in logical form, focusing particularly (...) on the examples Stanley provides in order to corroborate their presence. I argue that these examples are apt for an alternative treatment than that offered by Stanley—one which does not make recourse to covert variables, and is hence more credible. I end by spelling out some consequences of this argument for Stanley’s proposal. (shrink)

ABSTRACTThere is a growing body of literature describing conceptual frameworks for working with participatory visual methods. Through a global health lens, this paper examines some key themes within these frameworks. We reflect on our experiences of working with with an array of PVM to engage community members in Vietnam, Kenya, the Philippines and South Africa in biomedical research and public health. The participants that we have engaged in these processes live in under-resourced areas with high prevalence of communicable and non-communicable (...) diseases. Our paper describes some of the challenges that we have encountered while using PVM to foster knowledge exchange, build relationships and facilitate change among individuals and families, community members, health workers, biomedical scientists and researchers. We consider multiple ethical situations that have arisen through our work and discuss the ways in which we have navigated and negotiated them. We offer our reflections and learning from facil... (shrink)

International research guidance has shifted towards an increasingly proactive inclusion of children and adolescents in health research in recognition of the need for more evidence-based treatment. Strong calls have been made for the active involvement of children and adolescents in developing research proposals and policies, including in decision-making about research participation. Much evidence and debate on this topic has focused on high-income settings, while the greatest health burdens and research gaps occur in low-middle income countries, highlighting the need to take (...) account of voices from more diverse contexts. Between January and March 2014, 56 community representatives and secondary school students were involved in eight group discussions to explore views on the acceptability of involving children and adolescents in research, and how these groups should be involved in decision-making about their own participation. Discussions were voice-recorded and transcriptions analyzed using Framework Analysis, combining deductive and inductive approaches. Across these discussions, the idea of involving children and adolescents in decision-making about research participation was strongly supported given similar levels of responsibility carried in everyday life; existing capacity that should be recognized; the opportunity for learning involved; varying levels of parental control; and generational shifts towards greater understanding of science for adolescents than their parents. Joint decision-making processes were supported for older children and adolescents, with parental control influenced by perceptions of the risks involved in participation. Moves towards more active involvement of children and adolescents in planning studies and in making decisions about their participation are supported by these findings from Kenya. Important emerging considerations include the need to take account of the nature of proposed studies and prevailing attitudes and understanding of research in identifying children’s and adolescents’ roles. More research is needed to expand diversity and develop approaches to joint assent and consent processes that would fairly represent children’s and adolescents’ wishes and interests, towards their long term benefit. (shrink)

BackgroundCarefully planned research is critical to developing policies and interventions that counter physical, psychological and social challenges faced by young people living with HIV/aids, without increasing burdens. Such studies, however, must navigate a ‘vulnerability paradox’, since including potentially vulnerable groups also risks unintentionally worsening their situation. Through embedded social science research, linked to a cohort study involving Adolescents Living with HIV/aids (ALH) in Kenya, we develop an account of researchers’ responsibilities towards young people, incorporating concepts of vulnerability, resilience, and agency (...) as ‘interacting layers’.MethodsUsing a qualitative, iterative approach across three linked data collection phases including interviews, group discussions, observations and a participatory workshop, we explored stakeholders’ perspectives on vulnerability and resilience of young people living with HIV/aids, in relation to home and community, school, health care and health research participation. A total of 62 policy, provider, research, and community-based stakeholders were involved, including 27 ALH participating in a longitudinal cohort study. Data analysis drew on a Framework Analysis approach; ethical analysis adapts Luna’s layered account of vulnerability.ResultsALH experienced forms of vulnerability and resilience in their daily lives in which socioeconomic context, institutional policies, organisational systems and interpersonal relations were key, interrelated influences. Anticipated and experienced forms of stigma and discrimination in schools, health clinics and communities were linked to actions undermining ART adherence, worsening physical and mental health, and poor educational outcomes, indicating cascading forms of vulnerability, resulting in worsened vulnerabilities. Positive inputs within and across sectors could build resilience, improve outcomes, and support positive research experiences.ConclusionsThe most serious forms of vulnerability faced by ALH in the cohort study were related to structural, inter-sectoral influences, unrelated to study participation and underscored by constraints to their agency. Vulnerabilities, including cascading forms, were potentially responsive to policy-based and interpersonal actions. Stakeholder engagement supported cohort design and implementation, building privacy, stakeholder understanding, interpersonal relations and ancillary care policies. Structural forms of vulnerability underscore researchers’ responsibilities to work within multi-sectoral partnerships to plan and implement studies involving ALH, share findings in a timely way and contribute to policies addressing known causes of vulnerabilities. (shrink)

The book Philosophy of Sport: International Perspectives represents the work of some of the leading moral and philosophical academics in the popular practice of sport. All contributors are scholars and researchers in the area of the Philosophy of Sport, a growing area of serious study within universities and colleges across the world. The contributors are also active members of the International Association for the Philosophy of Sport a worldwide organisation dedicated to the development of the philosophy of sport as a (...) serious and influential area of academic study. The book adds to the growing literature, which focuses on rigorously examining the global significance that sport plays in the fabric of twenty-first century life. Articles within the book provide a diverse set of ideas related to sport from more familiar issue related to the ethics of performance enhancing substances and fair play, to issue of nationalism, and the way sport can contribute to human well-being. (shrink)

The potential of the folic acid biosynthesis pathway as a target for the development of antibiotics has been acknowledged for many years and validated by the clinical use of several drugs. Recently, the crystal structures of all but one of the enzymes in the pathway from GTP to dihydrofolate have been determined. Given that structure‐based drug design strategies are now widely employed, these recent developments have prompted a re‐evaluation of the potential of each of the enzymes in the pathway as (...) a target for development of specific inhibitors. Here, we review the current knowledge of the structure and mechanism of each enzyme in the bacterial folic acid biosynthesis pathway from GTP to dihydrofolate and draw conclusions regarding the potential of each enzyme as a target for therapeutic intervention. BioEssays 24:637–648, 2002. © 2002 Wiley Periodicals, Inc. (shrink)

I begin by examining perception of photographs from two directions: what we think photographs are, and the aspects of mind involved when viewing photographs. Traditional photographs are shown to be mnemonic tools, and memory identified as a key part of the process by which photographs are fully perceived. Second, I describe the metamorphogram; a non-traditional photograph which fits specific, author-defined criteria for being memory. The metamorphogram is shown to be analogous to a composite of all an individual’s episodic memories. Finally, (...) using the metamorphogram in artistic works suggests a bi-directional relationship between individual autobiographical memory and shared cultural memory. A model of this relationship fails to align with existing definitions of cultural memory, and may represent a new form: sociobiographical memory. I propose that the experiences documented here make the case for promoting a mutually beneficial relationship between philosophy and other creative disciplines, including photography. (shrink)

Many philosophers and psychologists argue that out everyday ability to predict and explain the actions and mental states of others is grounded in out possession of a primitive 'folk' psychological theory. Recently however, this theory has come under challenge from the simulation alternative. This alternative view says that human beings are able to predict and explain each other's actions by using the resources of their own minds to simulate the psychological aetiology of the actions of the others. This book and (...) the companion volume Folk Psychology: The Theory of Mind Debate together offer a richly woven fabric of philosophical and psychological theory, which promises to yield real insights into the nature of our mental lives. (shrink)

Presents general information about meteorology, weather, and climate and includes more than thirty activities to help study these topics, including making a ...

La menzogna è irrinunciabile per vincere in politica? Davi ci spiega quali sono i meccanismi di persuasione a cui ricorrono taluni politici per farsi eleggere e quali le responsabilità di quegli elettori che scelgono comunque di votare chi sostiene anche ciò che non può essere vero. È indubbio che la comunicazione politica si rifaccia al simbolismo e al linguaggio delle favole; non necessariamente per occultare la realtà, ma più direttamente per esprimere con maggiore efficacia il suo messaggio. Alle celebri favole (...) di 'Biancaneve', 'Cenerentola', 'Il brutto anatroccolo' sono ricorsi infatti uomini politici del calibro di Berlusconi, Prodi, Nixon, Carter, Mitterrand e partiti quali la Democrazia Cristiana; l'hanno fatto per conquistare voti ma anche per attivare ampi meccanismi di consenso che attingessero direttamente dall'inconscio collettivo. Le conseguenze - ammonisce l'autore - possono essere molto serie, come nel caso dell'attuale politica americana che ha portato la manipolazione e l'inganno a essere riconosciuti come tratti identitari della presidenza di George W. Bush. (shrink)

How do we think about the word politeia when this involves a reaching back to the past? The response, pursued in this paper, is that in the classical understanding of politeia there is a significant connection between the question of the ‘good’ and the constitution; a connection which has become occluded or obscured by modern constitutional thought. In support of this understanding of politeia it must be acknowledged that what is meant, in this paper, by ‘good’ is very different from (...) that conventionally found in contemporary constitutional, legal or political theory. In an effort to disclose how politeia unravels this novel sense of ‘the good’ the paper will closely consider the philosophical work of Hans-Georg Gadamer on Plato. The paper claims that this largely neglected work is of importance to contemporary constitutional philosophy, particularly in so far as it focuses, as in this paper, on classical traditions or origins within constitutional thought. (shrink)

This philosophical treatise on the foundations of semantics is a systematic effort to clarify, deepen, and defend the classical doctrine that words are conventional signs of mental states, principally thoughts and ideas, and that meaning consists in their expression. This expression theory of meaning is developed by carrying out the Gricean program, explaining what it is for words to have meaning in terms of speaker meaning, and what it is for a speaker to mean something in terms of intention. But (...) Grice's own formulations are rejected and alternatives developed. The foundations of the expression theory are explored at length, and the author develops the theory of thought as a fundamental cognitive phenomenon distinct from belief and desire, argues for the thesis that thoughts have parts, and identifies ideas or concepts with parts of thoughts. This book will appeal to students and professionals interested in the philosophy of language. (shrink)

Constitutional dialogue has become an influential concept to understand the relationship between courts and other the institutional branches of the state, with the primary focus being on legislatures. More recently, the place of dialogue within the constitutional literature has been challenged as vague; providing a potential to over-reach or overstate the judicial role and distorting the reality of practices which in fact shape the relationship between courts and other institutions. Critics have placed into focus the question: should constitutional scholarship abandon (...) ‘constitutional dialogue’ as a way of understanding the relationship between courts and other institutions within the constitutional order? This article seeks to respond to this question by arguing that constitutional dialogue remains an important aspect of understanding the development of constitutional understanding about inter-institutional roles but does so by acknowledging the criticisms levelled against constitutional dialogue. Developing this approach, the argument made in this article seeks to recast the theoretical foundations of dialogue in constitutional theory by shifting the understanding of dialogue away from its normative and descriptive tethers. In its place, constitutional dialogue should be considered in the context of a philosophical understanding of language and the role that it plays to create constitutional meanings and experiences. Dialogue has a deeper and more significant register than a metaphor conveying a ‘conversation’, ‘communication’ or a ‘deliberative rationality’ between the institutions of the constitutional order—dialogue must be understood through the perspective of language as disclosing a world of common meaning and experience. (shrink)

Michael Davis, a leading figure in the study of professional ethics, offers here both a compelling exploration of engineering ethics and a philosophical analysis of engineering as a profession. After putting engineering in historical perspective, Davis turns to the Challenger space shuttle disaster to consider the complex relationship between engineering ideals and contemporary engineering practice. Here, Davis examines how social organization and technical requirements define how engineers should (and presumably do) think. Later chapters test his analysis of engineering judgement and (...) autonomy empirically, engaging a range of social science research including a study of how engineers and managers work together in ten different companies. (shrink)

Extending a normal 24 hours day by four hours is unexpectedly highly disruptive to daily rhythms in gene expression in the blood. Using a paradigm in which human subjects were exposed to a 28 hours day, Archer and colleagues show how this sleep‐altering forced desynchrony protocol caused complex disruption to daily rhythms in distinct groups of genes. Such perturbations in the temporal organisation of the blood transcriptome arise quickly, and point to the fragile nature of coordinated genomic activity. Chronic disruption (...) of the daily and circadian rhythms in sleep compromise health and well‐being and this study reveals potential new molecular targets to combat the disruptive effects of shift work and jetlag. (shrink)

This paper addresses a problem about epistemic warrant. The problem is posed by philosophical arguments for externalism about the contents of thoughts, and similarly by philosophical arguments for architecturalism about thinking, when these arguments are put together with a thesis of first person authority. In each case, first personal knowledge about our thoughts plus the kind of knowledge that is provided by a philosophical argument seem, together, to open an unacceptably ‘non-empirical’ route to knowledge of empirical facts. Furthermore, this unwelcome (...) prospect of transferring a ‘non-empirical’ warrant from premises about our own mental states and about philosophical theory to a conclusion about external environment or internal architecture seems to depend upon little more than the possibility of knowledge by inference. (The use of the scare-quoted term ‘non-empirical’ is explained a couple of paragraphs further on.). (shrink)

In recent years it has become increasingly the norm in football1 to kick the ball out of play when a player is, or appears to be, inadvertently injured. Kicking the ball out of play in football represents a particular instantiation of a generally understood fair play norm, the voluntary suspension of play (VSP). In the philosophical literature, support for the VSP norm is provided by John Russell (2007) who claims that his interpretivist account of sport is helpful for evaluating complex (...) moral issues in sport in general and issues related to injury in football in particular. This paper examines whether Russell's interpretivist-backed account of autonomy can adequately inform football players as to the nuanced and ambiguous moral considerations that arise in relation to the VSP norm. The paper goes on to identify the highly complex dynamic circumstances football players need to consider in order to better discharge their moral responsibilities when faced with inadvertent injuries. (shrink)

Article copyright 2002. We provide a battery of examples of delusions against which theoretical accounts can be tested. Then we identify neuropsychological anomalies that could produce the unusual experiences that may lead, in turn, to the delusions in our battery. However, we argue against Maher's view that delusions are false beliefs that arise as normal responses to anomalous experiences. We propose, instead, that a second factor is required to account for the transition from unusual experience to delusional belief. The second (...) factor in the etiology of delusions can be described superficially as a loss of the ability to reject a candidate for belief on the grounds of its implausibility and its inconsistency with everything else that the patient knows, but we point out some problems that confront any attempt to say more about the nature of this second factor. (shrink)

Western philosophers have traditionally concentrated on theory as the means for expressing knowledge about a variety of phenomena. This absorbing book challenges this fundamental notion by showing how objects themselves, specifically scientific instruments, can express knowledge. As he considers numerous intriguing examples, Davis Baird gives us the tools to "read" the material products of science and technology and to understand their place in culture. Making a provocative and original challenge to our conception of knowledge itself, _Thing Knowledge _demands that we (...) take a new look at theories of science and technology, knowledge, progress, and change. Baird considers a wide range of instruments, including Faraday's first electric motor, eighteenth-century mechanical models of the solar system, the cyclotron, various instruments developed by analytical chemists between 1930 and 1960, spectrometers, and more. (shrink)

This paper investigates the medical law and ethics learning needs of Foundation doctors by means of a national survey developed in association with key stakeholders including the General Medical Council and Health Education England. Four hundred sevnty-nine doctors completed the survey. The average self-reported level of preparation in MEL was 63%. When asked to rate how confident they felt in approaching three cases of increasing ethical complexity, more FYs were fully confident in the more complex cases than in the more (...) standard case. There was no apparent relationship with confidence and reported teaching at medical school. The less confident doctors were no more likely to ask for further teaching on the topic than the confident doctors. This suggests that FYs can be vulnerable when facing ethical decisions by being underprepared, not recognising their lack of ability to make a reasoned decision or by being overconfident. Educators need to be aware of this and provide practical MEL training based on trainee experiences and real-world ethics and challenge learners’ views. Given the complexities of many ethical decisions, preparedness should not be seen as the ability to make a difficult decision but rather a recognition that such cases are difficult, that doubt is permissible and the solution may well be beyond the relatively inexperienced doctor. Educators and supervisors should therefore be ensuring that this is clear to their trainees. This necessitates an environment in which questions can be asked and uncertainty raised with the expectation of a supportive response. (shrink)

It is often thought that traditional recidivism prediction tools used in criminal sentencing, though biased in many ways, can straightforwardly avoid one particularly pernicious type of bias: direct racial discrimination. They can avoid this by excluding race from the list of variables employed to predict recidivism. A similar approach could be taken to the design of newer, machine learning-based (ML) tools for predicting recidivism: information about race could be withheld from the ML tool during its training phase, ensuring that the (...) resulting predictive model does not use race as an explicit predictor. However, if race is correlated with measured recidivism in the training data, the ML tool may ‘learn’ a perfect proxy for race. If such a proxy is found, the exclusion of race would do nothing to weaken the correlation between risk (mis)classifications and race. Is this a problem? We argue that, on some explanations of the wrongness of discrimination, it is. On these explanations, the use of an ML tool that perfectly proxies race would (likely) be more wrong than the use of a traditional tool that imperfectly proxies race. Indeed, on some views, use of a perfect proxy for race is plausibly as wrong as explicit racial profiling. We end by drawing out four implications of our arguments. (shrink)

Read this excellent collection of informative papers in the field to stimulate your ow the field and readers interested in the nature of the discipline of ...

Grice’s Razor is a methodological principle that many philosophers and linguists have used to help justify pragmatic explanations of linguistic phenomena over semantic explanations. A number of authors in the debate over contextualism argue that an invariant semantics together with Grice’s (1975) conversational principles can account for the contextual variability of knowledge claims. I show here that the defense of Grice’s Razor found in these “Gricean invariantists,” and its use against epistemic contextualism, display all the problems pointed out earlier in (...) Davis (1998). The everyday variation in acceptable knowledge claims is better explained in terms of implicature than indexicality, but general conversational principles shed little light on whether ‘know’ is used hyperbolically, meiotically, or loosely in a context, although this issue is crucial in deciding what if anything ‘S knows p’ implicates. I present reasons favoring an account of the representative bank case in terms of loose use, making clear how they differ from Grice’s Razor. (shrink)

In recent years there has been a resurgence of interest in the work of Emmanuel Levinas, widely recognized as one of the most important yet difficult philosophers of the 20th century. In this much-needed introduction, Davis unpacks the concepts at the centre of Levinas's thought - alterity, the Other, the Face, infinity - concepts which have previously presented readers with major problems of interpretation. Davis traces the development of Levinas's thought over six decades, describing the context in which he worked, (...) and the impact of his writings. He argues that Levinas's work remains tied to the ontological tradition with which he wants to break, and demonstrates how his later writing tries to overcome this dependency by its increasingly disruptive, sometimes opaque, textual practice. He discusses Levinas's theological writings and his relationship to Judaism, as well as the reception of his work by contemporary thinkers, arguing that the influence of his work has led to a growing interest in ethical issues among poststructuralist and postmodernist thinkers in recent years. Comprehensive and clearly written, this book will be essential reading for students and researchers in continental philosophy, French studies, literary theory and theology. (shrink)

Representing Stephen Davies's best shorter writings, these essays outline developments within the philosophy of music over the last two decades, and summarize the state of play at the beginning of a new century. Including two new and previously unpublished pieces, they address both perennial questions and contemporary controversies, such as that over the 'authentic performance' movement, and the impact of modern technology on the presentation and reception of musical works. Rather than attempting to reduce musical works to a single (...) type, Davies recognizes a great variety of kinds, and a complementary range of possibilities for their rendition. (shrink)

This study aimed to develop a valid and reliable performance analysis template for quantifying team action variables in elite men’s wheelchair basketball. First action variables and operational definitions were identified by the authors and verified by an expert panel of wheelchair basketball coaching staff in order to establish expert validity. A total of 109 action variable were then placed into 17 agreed Categorical Predictor Variable categories. The action variables were then used to develop a computerized performance analysis template for post-event (...) analysis. Each possession (n = 200) from an international men’s wheelchair basketball game was analyzed by the first author on two occasions for assessment of intra-observer reliability and by a coach and a performance analyst for inter-observer reliability. Percentage error and Weighted Kappa coefficients were calculated to compare the levels of error and agreement for each action variable. Intra-observer reliability demonstrated perfect or almost perfect agreement (. (shrink)

An examination of the state of journalism and the need for change. For students and professionals on journalism fields.

In this paper, I shall defend externalism for the contents of perceptual experience. A perceptual experience has representational properties; it presents the world as being a certain way. A visual experience, for example, might present the world to a subject as containing a surface with a certain shape, lying at a certain distance, in a certain direction; perhaps a square with sides about 30 cm, lying about one metre in front of the subject, in a direction about 20 degrees to (...) the left of straight ahead. (shrink)

We build on Morgan’s deep conventionalist base by offering a pragmatic approach for achieving normative progress on sports most intractable problems (e.g. performance enhancemen...

Narrative and History explains the key concepts and practices in the composition and writing of history. It explores how knowledge of the ways in which historians author history affects many conventional understandings of its nature. Major concepts such as truth, objectivity, reference and representation are re-evaluated and re-thought in radical ways. Combining theory with practice, Alun Munslow expands the boundaries of the discipline and charts a new role for unconventional historical forms and modes of expression.

Humanism offers students a clear and lucid introductory guide to the complexities of Humanism, one of the most contentious and divisive of artistic or literary concepts. Showing how the concept has evolved since the Renaissance period, Davies discusses humanism in the context of the rise of Fascism, the onset of World War II, the Holocaust, and their aftermath. Humanism provides basic definitions and concepts, a critique of the religion of humanity, and necessary background on religious, sexual and political themes (...) of modern life and thought, while enlightening the debate between humanism, modernism and antihumanism through the writings and works of such key figures as Pico Erasmus, Milton, Nietzsche, and Foucault. (shrink)

This chapter contains sections titled: Introduction: Questions of Meaning Theories of Meaning Language, Mind and Metaphysics: Questions of Priority Semantic Theories: Davidson's Programme Analysing the Concept of Meaning: Grice's Programme Pragmatics: Conversational Implicature and Relevance Theory.

Utilitarianism has an apparent pedigree when it comes to animal welfare. It supports the view that animal welfare matters just as much as human welfare. And many utilitarians support and oppose various practices in line with more mainstream concern over animal welfare, such as that we should not kill animals for food or other uses, and that we ought not to torture animals for fun. This relationship has come under tension from many directions. The aim of this article is to (...) add further considerations in support of that tension. I suggest three ways in which utilitarianism comes significantly apart from mainstream concerns with animal welfare. First, utilitarianism opposes animal cruelty only when it offers an inefficient ratio of pleasure to pain; while this may be true of eating animal products, it is not obviously true of other abuses. Second, utilitarianism faces a familiar problem of the inefficacy of individual decisions; I consider a common response to this worry, and offer further concerns. Finally, the common utilitarian argument against animal cruelty ignores various pleasures that humans may get from the superior status that a structure supporting exploitation confers. (shrink)

A COMPANION TO AESTHETICS This second edition of A Companion to Aesthetics examines questions that were among the earliest discussed by ancient philosophers, such as the nature of beauty and the relation between morality and art, while also addressing a host of new issues prompted by recent developments in the arts and in philosophy, including coverage of non-Western art traditions and of everyday and environmental aesthetics. The volume also canvases debates regarding the nature of representation, the relation between art and (...) truth, and the criteria for interpretation, which are among the most hotly discussed topics in contemporary philosophy. In this extensively revised and updated edition, 168 alphabetically arranged articles provide comprehensive treatment of the main topics and writers in aesthetics. Major additions include historical overviews from the prehistoric to the present and a section on the individual arts. A Companion to Aesthetics will serve students of philosophy, literary criticism, and cultural studies - as well as the educated general reader - both as a work of reference and, with its many substantial essays, as a guide to the best thinking about the arts from the ancient Greeks to the dawn of the twenty-first century. (shrink)

This essay (a revised version of my undergraduate honors thesis at Stanford) constructs a theory of analogy as it applies to argumentation and reasoning, especially as used in fields such as philosophy and law. The word analogy has been used in different senses, which the essay defines. The theory developed herein applies to analogia rationis, or analogical reasoning. Building on the framework of situation theory, a type of logical relation called determination is defined. This determination relation solves a puzzle about (...) analogy in the context of logical argument, namely, whether an analogous situation contributes anything logically over and above what could be inferred from the application of prior knowledge to a present situation. Scholars of reasoning have often claimed that analogical arguments are never logically valid, and that they therefore lack cogency. However, when the right type of determination structure exists, it is possible to prove that projecting a conclusion inferred by analogy onto the situation about which one is reasoning is both valid and non-redundant. Various other properties and consequences of the determination relation are also proven. Some analogical arguments are based on principles such as similarity, which are not logically valid. The theory therefore provides us with a way to distinguish between legitimate and illegitimate arguments. It also provides an alternative to procedures based on the assessment of similarity for constructing analogies in artificial intelligence systems. (shrink)

Cognitive approaches contribute to our understanding of delusions by providing an explanatory framework that extends beyond the personal level to the sub personal level of information-processing systems. According to one influential cognitive approach, two factors are required to account for the content of a delusion, its initial adoption as a belief, and its persistence. This chapter reviews Bayesian developments of the two-factor framework.