The Ontology for Biomedical Investigations (OBI) is an ontology that provides terms with precisely defined meanings to describe all aspects of how investigations in the biological and medical domains are conducted. OBI re-uses ontologies that provide a representation of biomedical knowledge from the Open Biological and Biomedical Ontologies (OBO) project and adds the ability to describe how this knowledge was derived. We here describe the state of OBI and several applications that are using it, such as adding semantic expressivity to (...) existing databases, building data entry forms, and enabling interoperability between knowledge resources. OBI covers all phases of the investigation process, such as planning, execution and reporting. It represents information and material entities that participate in these processes, as well as roles and functions. Prior to OBI, it was not possible to use a single internally consistent resource that could be applied to multiple types of experiments for these applications. OBI has made this possible by creating terms for entities involved in biological and medical investigations and by importing parts of other biomedical ontologies such as GO, Chemical Entities of Biological Interest (ChEBI) and Phenotype Attribute and Trait Ontology (PATO) without altering their meaning. OBI is being used in a wide range of projects covering genomics, multi-omics, immunology, and catalogs of services. OBI has also spawned other ontologies (Information Artifact Ontology) and methods for importing parts of ontologies (Minimum information to reference an external ontology term (MIREOT)). The OBI project is an open cross-disciplinary collaborative effort, encompassing multiple research communities from around the globe. To date, OBI has created 2366 classes and 40 relations along with textual and formal definitions. The OBI Consortium maintains a web resource providing details on the people, policies, and issues being addressed in association with OBI. (shrink)

Volume 25, Issue 7-8, November - December 2020, Page 861-863.

In this paper Kirsten Fink-Jensen suggests how a phenomenological-hermeneutic perspective can contribute to the knowledge of learning and teaching processes in music education in school. The philosophical frame is Danish philosophy of life, represented by Knud Ejler Løgstrup, and Merleau-Ponty's philosophy of body, both pointing to the wholeness of mind and body in all kinds of actions. Within this framework interpretation is an epistemological, practical-hermeneutic activity based on different analytical methods. Phenomenologically, experiences of music are constituted in an intertwinement (...) of personal, cultural, and local meaning. The challenge facing the teacher is then to understand what becomes meaningful to persons in a given situation. 'Bodily dialogue' is a metaphor of a hermeneutic process of understanding that highlights the importance of bodily aspects in the teacher's answer to a child's musical attuned articulations. This focus can facilitate children's learning processes and change and qualify the teacher's didactic reflections on the impact and progression of music lessons. (shrink)

The past 50 years have seen an accumulation of evidence suggesting that associative learning depends on high-level cognitive processes that give rise to propositional knowledge. Yet, many learning theorists maintain a belief in a learning mechanism in which links between mental representations are formed automatically. We characterize and highlight the differences between the propositional and link approaches, and review the relevant empirical evidence. We conclude that learning is the consequence of propositional reasoning processes that cooperate with the unconscious processes involved (...) in memory retrieval and perception. We argue that this new conceptual framework allows many of the important recent advances in associative learning research to be retained, but recast in a model that provides a firmer foundation for both immediate application and future research. (shrink)

This entry considers the philosophical subject called 'metaphysics'. There have been many conceptions of metaphysics, and metaphysics has faced severe criticism throughout the history of philosophy and continues to do so. Besides discussing some major trends in analytic metaphysics - understood as 'metaphysics done by analytic philosophers' - we consider some of the criticisms and possible responses.

Struggles over precious resources such as oil, water, and land are increasingly evident in the contemporary world. States, indigenous groups, and corporations vie to control access to those resources, and the benefits they provide. These conflicts are rapidly spilling over into new arenas, such as the deep oceans and the Polar regions. How should these precious resources be governed, and how should the benefits and burdens they generate be shared? Justice and Natural Resources provides a systematic theory of natural resource (...) justice. It argues that we should use the benefits and burdens flowing from these resources to promote greater equality across the world, and share governance over many important resources. At the same time, the book takes seriously the ways in which particular resources can matter in peoples lives. It provides invaluable guidance on a series of pressing issues, including the scope of state resource rights, the claims of indigenous communities, rights over ocean resources, the burdens of conservation, and the challenges of climate change and transnational resource governance. It will be required reading for anyone interested in natural resource governance, climate politics, and global justice. (shrink)

Many contemporary philosophers rate error theories poorly. We identify the arguments these philosophers invoke, and expose their deficiencies. We thereby show that the prospects for error theory have been systematically underestimated. By undermining general arguments against all error theories, we leave it open whether any more particular arguments against particular error theories are more successful. The merits of error theories need to be settled on a case-by-case basis: there is no good general argument against error theories.

Philosophers often treat racist and sexist slurs as a special sort of puzzle. What is the difference between a slur and its correlates? In attempting to answer this question, a second distinction has been overlooked: that between slurs and insults. What makes a term count as a slur? This is not an unnecessary taxonomical question as long as ableist terms such as ‘moron’ are dismissed as mere insults. Attempts to resolve the insult/slur distinction by considering the communicative content of slurs (...) are not promising. A better solution is offered by speech act theory, and this paper develops a novel way to describe ordinary slurring utterances as oppressive speech acts. This can both explain the difference between slurs and insults, and challenge the dismissal of ableist terms. (shrink)

We defend Joseph Melia's thesis that the role of mathematics in scientific theory is to 'index' quantities, and that even if mathematics is indispensable to scientific explanations of concrete phenomena, it does not explain any of those phenomena. This thesis is defended against objections by Mark Colyvan and Alan Baker.

In 120 exquisitely reproduced black-and-white images, Minnesota in Our Time: A Photographic Portrait showcases the work of twelve talented photographers who sought to capture the essence of the state and its people at the threshold of the new millennium. Like the Farm Security Administration photographers of the Depression era, these men and women document the details of life in this time and the transformations now taking place in this state. This work is a product of the MINNESOTA 2000 Photo Documentation (...) Project, a three-year effort that has also produced an archival collection of 360 images and a museum exhibition. The project's wealth of images provides a multifaceted look at lives and landscapes in Minnesota, focusing on common experiences and themes among a diverse population of individuals. Edited by photography historian George Slade, the book features a selection of the photographs, a lucid interpretive essay by Slade and art historian Robert Silberman, a preface by exhibition curator Bonnie G. Wilson, and brief introductions to and commentaries about each photographer's work. Minnesota in Our Time features photographs by Joe Allen, Tom Arndt, Stephen Dahl, Chris Faust, George Byron Griffiths, Terry Gydesen, David Heberlein, Wing Young Huie, Mark Jensen, Peter Latner, David Parker, and Keri Pickett. (shrink)

Choice architecture is heralded as a policy approach that does not coercively reduce freedom of choice. Still we might worry that this approach fails to respect individual choice because it subversively manipulates individuals, thus contravening their personal autonomy. In this article I address two arguments to this effect. First, I deny that choice architecture is necessarily heteronomous. I explain the reasons we have for avoiding heteronomous policy-making and offer a set of four conditions for non-heteronomy. I then provide examples of (...) nudges that meet these conditions. I argue that these policies are capable of respecting and promoting personal autonomy, and show this claim to be true across contrasting conceptions of autonomy. Second, I deny that choice architecture is disrespectful because it is epistemically paternalistic. This critique appears to loom large even against non-heteronomous nudges. However, I argue that while some of these policies may exhibit epistemically paternalistic tendencies, these tendencies do not necessarily undermine personal autonomy. Thus, if we are to find such policies objectionable, we cannot do so on the grounds of respect for autonomy. (shrink)

An Introduction to Philosophical Methods is the first book to survey the various methods that philosophers use to support their views. Rigorous yet accessible, the book introduces and illustrates the methodological considerations that are involved in current philosophical debates. Where there is controversy, the book presents the case for each side, but highlights where the key difficulties with them lie. While eminently student-friendly, the book makes an important contribution to the debate regarding the acceptability of the various philosophical methods, and (...) so it will also be of interest to more experienced philosophers. (shrink)

What should we do when faced with powerful theoretical arguments that support a severe change in our personal beliefs and commitments? For example, what should new parents do when confronted by unanswered anti-natalist arguments, or two lovers vexed by social theory that apparently undermines love? On the one hand, it would be irrational to ignore theory just because it’s theory; good theory is evidence, after all. On the other hand, factoring in theory can be objectifying, or risks unraveling one's life, (...) fracturing one's identity or social relations. Sometimes, then, following the evidence where it apparently leads would mean not merely changing what we think but who we are. Some might say that there’s something right about the thought that theory can bear on what we ought to believe, it’s just that when we work with full beliefs, only then do we seriously risk having to substantially alter our doxastic economy when pressed by exceptional theoretical arguments. When we work with partial beliefs, however, this risk is greatly diminished. Others will say that we can advocate or champion revisionary positions whilst rationally retaining our pre-theoretical personal convictions. Still others will argue that we should adopt a Moorean posture towards the revisionary arguments. I argue that each response is inadequate, and argue instead that we are permitted to bracket certain kinds of theoretical evidence against our beliefs because of the personal and ethical risks born out of giving them serious consideration. In turn, some of philosophy's doxastic influence is constrained by its attendant ethical risks: the personal enjoys a partial insulation from the theoretical. I close by addressing what this means for practicing philosophers. (shrink)

There is a recent and growing trend in philosophy that involves deferring to the claims of certain disciplines outside of philosophy, such as mathematics, the natural sciences, and linguistics. According to this trend— deferentialism , as we will call it—certain disciplines outside of philosophy make claims that have a decisive bearing on philosophical disputes, where those claims are more epistemically justified than any philosophical considerations just because those claims are made by those disciplines. Deferentialists believe that certain longstanding philosophical problems (...) can be swiftly and decisively dispatched by appeal to disciplines other than philosophy. In this paper we will argue that such an attitude of uncritical deference to any non-philosophical discipline is badly misguided. With reference to the work of John Burgess and David Lewis, we consider deference to mathematics. We show that deference to mathematics is implausible and that main arguments for it fail. With reference to the work of Michael Blome-Tillmann, we consider deference to linguistics. We show that his arguments appealing to deference to linguistics are unsuccessful. We then show that naturalism does not entail deferentialism and that naturalistic considerations even motivate some anti-deferentialist views. Finally, we set out deferentialism’s failings and present our own anti-deferentialist approach to philosophical inquiry. (shrink)

In our increasingly instrumentalist culture, debates over the privatization of schooling may be beside the point. Whether we hatch some new plan for chartering or funding schools, or retain the traditional model of government-run schools, the ongoing instrumentalization of education threatens the very possibility of public education. Indeed, in the culture of performativity, not only the public school but public life itself is hollowed out and debased. Qualities are recast as quantities, judgments replaced by rubrics, teaching and learning turned into (...) exchange values. Schools should be central to public life: key locations for the regeneration of values, the cultivation of judgment, and the creation of the conditions for positive freedom. In this article Chris Higgins, drawing on Hannah Arendt and Alasdair MacIntyre, goes beyond typical treatments of the schools as equalizer of individual opportunity to explore three aspects of educational publicity: the school as an object of communal concern, schooling as preparation for public life, and the classroom as public space. (shrink)

We consider the influence that John Forrester’s work has had on thinking in, with, and from cases in multiple disciplines. Forrester’s essay ‘If p, Then What? Thinking in Cases’ was published in History of the Human Sciences in 1996 and transformed understandings of what a case was, and how case-based thinking worked in numerous human sciences. Forrester’s collection of essays Thinking in Cases was published posthumously, after his untimely death in 2015, and is the inspiration for the special issue we (...) introduce. This comprises new research from authors working in and across the history of science and medicine, gender and sexuality studies, philosophy of science, semiotics, film studies, literary studies and comparative literature, psychoanalytic studies, medical humanities, and sociology. This research addresses what it means to reason in cases in particular temporal, spatial, or genre-focused contexts; introduces new figures into lineages of case-based reasoning; emphasizes the unfinished and unfinishable character of some case reading and autobiographical accounts; and shows the frequency with which certain kinds of reasoning attempted with cases fail. The special issue opens up new directions for thinking and working with cases and case-based reasoning in the humanities and human sciences. (shrink)

In this essay, the authors analyze and interpret facsimiles of important original documents—published here for the first time—that are deeply relevant to the education of the young Ayn Rand at the University of Petrograd. This definitive reading of source material provides significant documentation of Rand’s courses, teachers, and textbooks—and what she might have learned from them. Other original source materials are revealed to advance further investigations of this key period in Rand’s life. Recent commentary on Rand’s education in Gary H. (...) Merrill’s book, False Wisdom, is also considered. (shrink)

Small businesses in developing countries, as part of global supply chains, are sometimes assumed to respond in a straightforward manner to institutional demands for improved working conditions. This article problematizes this perspective. Drawing upon extensive qualitative data from Tirupur’s knitwear export industry in India, we highlight owner-managers’ agency in avoiding or circumventing these demands. The small businesses here actively engage in irresponsible business practices and “evasion” institutional work to disrupt institutional demands in three ways: undermining assumptions and values, dissociating consequences, (...) and accumulating autonomy and political strength. This “evasion” work is supported by three conditions: void, distance, and contradictions. Through detailed empirical findings, the article contributes to research on both small business social responsibility and institutional work. (shrink)

Throughout history philosophers have relentlessly pursued what may be called "inaccessible domains." This book explores how the traditions of existential phenomenology relate to Freudian psychoanalysis. A clear, succinct, and systematic account of the philosophical presuppositions of psychoanalytic theory and practice, this work offers a deeper and richer understanding and appreciation of Freudian thought, as well as its antecedents and influences. With its unique perspective on Freud's work, Apprehending the Inaccessible puts readers in a better position to appreciate his contributions and (...) evaluate the relationship between his and other philosophical world views. The authors, both of whom have extensive backgrounds in philosophy and psychology, present balanced critical analyses of crucial developments in, for example, the evolution of the Freudian notion of the unconscious, and the engagement of existential phenomenology with Freudian psychoanalysis. Askay and Farquhar then consider-often for the first time-individual thinkers' reflections on and interpretations of Freud, ranging from the primary figures in existential phenomenology to the most prominent figures in the existential psychoanalytic movement. Even as their work offers a new approach to Freudian thought, it reasserts the importance of alternative views found in existential phenomenology as those views pertain to psychoanalysis and the question of apprehending the inaccessible. (shrink)

We address three questions raised by Cummings and Foreman regarding a model of Gitik and Sharon. We first analyze the PCF-theoretic structure of the Gitik–Sharon model, determining the extent of good and bad scales. We then classify the bad points of the bad scales existing in both the Gitik–Sharon model and other models containing bad scales. Finally, we investigate the ideal of subsets of singular cardinals of countable cofinality carrying good scales.

Do numbers exist? Do properties? Do possible worlds? Do fictional characters? Many metaphysicians spend time and effort trying to answer these and other questions about the existence of various entities. These inquiries have recently encountered opposition: a group of philosophers, drawing inspiration from Aristotle, have argued that many or all of the existence questions debated by metaphysicians can be answered trivially, and so are not worth debating. Our task is to defend existence questions from the neo-Aristotelians' attacks.

This paper distinguishes revolutionary fictionalism from other forms of fictionalism and also from other philosophical views. The paper takes fictionalism about mathematical objects and fictionalism about scientific unobservables as illustrations. The paper evaluates arguments that purport to show that this form of fictionalism is incoherent on the grounds that there is no tenable distinction between believing a sentence and taking the fictionalist's distinctive attitude to that sentence. The argument that fictionalism about mathematics is ‘comically immodest’ is also evaluated. In place (...) of those arguments, an argument against fictionalism about abstract objects of any kind is presented in the last section. This argument takes the form of a trilemma against the fictionalist. (shrink)

An epistemologist tells you that knowledge is more than justified true belief. You trust them and thus come to believe this on the basis of their testimony. Did you thereby come to know that this view is correct? Intuitively, there is something intellectually wrong with forming philosophical beliefs on the basis of testimony, and yet it's hard to see why philosophy should be significantly epistemically different from other areas of inquiry in a way that would fully prohibit belief by testimony. (...) This, I argue, is the puzzle of philosophical testimony. In this paper, I explore the puzzle of philosophical testimony and its ramifications. In particular, I examine the case for pessimism about philosophical testimony—the thesis that philosophical belief on the basis of testimony is impossible or is in some way illegitimate—and I argue that it lacks adequate support. I then consider whether the source of the apparent intellectual wrongness of testimonial‐based philosophical belief is grounded in non‐epistemic norms and goals of philosophical practice itself and argue that such norms are implausible, don't conflict with testimonial‐based philosophical belief, or else are mere disciplinary norms, lacking substantial normative force that would make it wrong to form testimonial‐based philosophical belief. (shrink)

Analyzes the intellectual roots and philosophy of Ayn Rand. Second edition adds a new preface and an analysis of transcripts documenting Rand's education at Petrograd State University"--Provided by publisher.

Global distributive justice is now part of mainstream political debate. It incorporates issues that are now a familiar feature of the political landscape, such as global poverty, trade justice, aid to the developing world and debt cancellation. This is the first textbook to focus exclusively on issues of distributive justice on the global scale. It gives clear and up-to-date accounts of the major theories of global justice and spells out their significance for a series of important political issues, including climate (...) change, international trade, human rights and migration. These issues are brought to life through the use of case studies, which emphasise the connection of theories of justice to contemporary politics, and 'Further Issues' sections, which discuss emerging debates or controversies that are likely to command increasing attention in the coming years. (shrink)

Catcalls have been said to insult, intimidate, and silence their targets. The harms that catcalls inflict on individuals are reason enough to condemn them. This paper argues that they also inflict a type of structural harm by subordinating their targets. Catcalling initiates an unwanted conversation where none should exist. This brings the rules and norms governing conversations to bear in such a way that the catcall assigns their target a ‘subordinate discourse role’. This not only constrains the behaviour of the (...) target here and now, but also influences the norms governing future conversations. Catcalls are then not only bad because of the effects on their target, but also because of their pernicious contribution to the wider normative landscape. (shrink)

Support vector machines are being used increasingly in affective science as a data-driven classification method and feature reduction technique. Whereas traditional statistical methods typically compare group averages on selected variables, SVMs use a predictive algorithm to learn multivariate patterns that optimally discriminate between groups. In this review, we provide a framework for understanding the methods of SVM-based analyses and summarize the findings of seminal studies that use SVMs for classification or data reduction in the behavioral and neural study of emotion (...) and affective disorders. We conclude by discussing promising directions and potential applications of SVMs in future research in affective science. (shrink)

Some philosophers deny the existence of composite material objects. Other philosophers hold that whenever there are some things, they compose something. The purpose of this paper is to scrutinize an objection to these revisionary views: the objection that nihilism and universalism are both unacceptably uncharitable because each of them implies that a great deal of what we ordinarily believe is false. Our main business is to show how nihilism and universalism can be defended against the objection. A secondary point is (...) that universalism is harder to defend than nihilism. (shrink)

The Palgrave Handbook of Philosophical Methods contains twenty-six original and substantive papers examining a wide selection of philosophical methods. Drawing upon an international range of leading contributors, this Handbook will help shape future debates about how philosophy should be done. Topics explored include philosophical disagreement, thought experiments, intuitions, rational reflection, conceptual analysis, explanation, parsimony, and experimental philosophy. Written in a clear and accessible form, and drawing upon the most recent thinking in the field, the papers will be of particular interest (...) to researchers and high-level undergraduates. (shrink)

The Trompenaars database (1993) updated with Hampden-Turner (1998) has been assembled to help managers structure their cross cultural experiences in order to develop their competence for doing business and managing across the world. The database comprises more than 50,000 cases from over 100 countries and is one of the world's richest sources of social constructs. Woolliams and Trompenaars (1998) review the analysis undertaken by the authors in the last five years to develop the methodological approach underpinning the work. Recently Trompenaars (...) with Hampden-Turner (Trompenaars and Woolliams, 1999) have extended the concepts into a new model on dilemma reconciliation of cultural differences. This paper reviews these latest updates in relation to dilemmas of cross-cultural business ethics. The paper asserts that knowledge in relation to business ethics is culturally specific; and that ethnocentrism is not easy to avoid. Too great an emphasis on rational-analytic conceptions of reality may mean that syntheses, emotion, and intuition, are not adequately developed. This presents implications for doing business and managing across cultures and for resolving ethical dilemmas. (shrink)

From the Victorian era to our own, critics of Herbert Spencer have portrayed his science‐based philosophical system as irrelevant to the concerns of practicing scientists. Yet, as a number of scholars have recently argued, an extraordinary range of reformist and experimental projects across the human and life sciences took their bearings from Spencer's work. This essay examines Spencerian science as practiced by the biologist, sociologist, and town planner Patrick Geddes (1854–1932). Through a close examination of his experimental natural history of (...) the late 1870s and early 1880s, his wider writings on the evolutionary process in the 1880s, and his efforts later in that decade to improve the slums of Edinburgh, this essay reveals Geddes's deep, unifying, and energizing commitment to Spencer's program. Recapturing that commitment can not only help historians rethink Spencerian science as practice but also suggest ways of overcoming the dichotomy between elite ideas and practical activity that bedevils much contemporary historiography of science. (shrink)

Popper's definition looked initially promising provided that the restriction of classical logic was removed. As we have seen, this promise is not fulfilled. The search for a satisfactory verisimilitude ordering must therefore be pursued along more mainstream lines. The present exercise ought, however, to make us aware of the possibility that breakdowns of proposed definitions might only occur because of strictly classical assumptions.

As Early Years care and education comes under closer outside scrutiny the number of practitioners moving into managerial roles is constantly increasing, this book focuses on how to make policy work in practice: clarifying the manager’s responsibilities and his or her duty to lead exploring the use of policy and procedures, why we have procedure, how to create procedures and how to put it into practice offering advice on effective planning, how to monitor progress and activity, and tips on feedback (...) and reflection providing links to Ofsted. This is a must-have for students, assessors, nursery nurses with an interest in career development into management and anyone working within a early-years environment in a managerial role. (shrink)

How should we understand the relationship between the contents of our color, causal, modal, and evaluative beliefs, on the one hand, and color, causal, modal, and evaluative properties, on the other? According to Barry Stroud (2011), because of the nature of the contents of those types of beliefs, we should also think that what he calls a “negative metaphysical verdict” on the latter is not one that we could consistently maintain. The metaphysical project aims to arrive at an improved conception (...) of ourselves and our relation the world, no matter if that conception is positive or negative. But if Stroud is right that we cannot consistently arrive at the view that all of our causal, modal, and evaluative beliefs are systematically false, we will see that we cannot consistently reach the negative verdict. But failure to reach the negative verdict doesn’t mean that we have reached the positive verdict. Stroud calls this philosophical failure “metaphysical dissatisfaction”. In this paper, I argue that we can appropriate a metaepistemological response to the problem of the external world which shares its core features with Stroud’s (2000, 2011) arguments, but which nevertheless leaves us with a distinctive kind of epistemological dissatisfaction. (shrink)

In the ‘ordinary business of life’, everyone makes claims about what there is. For instance, we say things like: ‘There are some beautiful chairs in my favourite furniture shop’. Within the context of philosophical debate, some philosophers also make claims about what there is. For instance, some ontologists claim that there are chairs; other ontologists claim that there are no chairs. What is the relation between ontologists’ philosophical claims about what there is and ordinary claims about what there is? According (...) to Cian Dorr, ontologists’ claims and denials of existence belong to ‘a sort of professional jargon’. Dorr claims, for example, that ‘There are prime numbers between 20 and 30’ can be used superficially or used fundamentally. Ordinary uses of are superficial: we use the sentence to assert a boring, well-known truth. But in the ontology room, is used fundamentally, to assert that numbers are ‘part of the ultimate furniture of reality’: and this is a substantial metaphysical doctrine, not a boring truth. In this paper, we will show that none of Dorr’s arguments for these claims succeeds. (shrink)

This introduction to the twentieth anniversary volume of The Journal of Ayn Rand Studies celebrates the creating and sustaining of a forum in which writers coming from virtually every discipline, representing a diverse range of critical perspectives, have advanced the scholarly study of Ayn Rand and her times.

The Toulmin diagram layout is very familiar and widely used, particularly in the teaching of critical thinking skills. The conventional box-and-arrow diagram is equally familiar and widespread. Translation between the two throws up a number of interesting challenges. Some of these challenges (such as the relationship between Toulmin warrants and their counterparts in traditional diagrams) represent slightly different ways of looking at old and deep theoretical questions. Others (such as how to allow Toulmin diagrams to be recursive) are diagrammatic versions (...) of questions that have already been addressed in artificial intelligence models of argument. But there are further questions (such as the relationships between refutations, rebuttals and undercutters, and the roles of multiple warrants) that are posed as a specific result of examining the diagram inter-translation problem. These three classes of problems are discussed. To the first class are addressed solutions based on engineering pragmatism; to the second class, are addressed solutions drawn from the appropriate literature; and to the third class, fuller exploration is offered justifying the approaches taken in developing solutions that offer both pragmatic utility and theoretical interest. Finally, these solutions are explored briefly in the context of the Araucaria system, showing the ways in which analysts can tackle arguments either using one diagrammatic style or another, or even a combination of the two. (shrink)

In this article we address the question of how many impossible images Escher produced. To answer requires us first to clarify a range of concepts, including content, ambiguity, illusion, and impossibility. We then consider, and reject, several candidates for impossibility before settling on an answer.

This paper offers an inconsistent model of motion perception. It was prompted by work on inconsistent motion due to Hegel and, following him, Priest. But the paper skirts Hegel's full scale idealism, by proposing that the inconsistency is with the cognitive contents of motion perception. The paper draws on work in the psychology of perception, and in the theory of inconsistency. I begin by noting the prima facie argument that temporal change threatens inconsistency, and canvassing ways in which this might (...) be avoided. The orthodox reply to the prima facie argument is that one and the same thing can have different incompatible properties at different times. This is plausible when applied to motion in the physical world. However, applied to cognition, it can be seen that the phenomenon of phi or beta, combined with the mechanism of a Reichardt detector, lends support to one key step in the prima facie argument, namely re-identification over time. The inconsistency of the model is then seen to follow from application of the Fade Principle. Advantages of the model are stressed: including a simple explanation of the debilitating condition of akinetopsia, that is, motion blindness; and a suggestion as to how to account for the “moving now.”. (shrink)