Die Übernahme des KI-Unternehmens DeepMind durch Google für rund eine halbe Milliarde US-Dollar signalisierte vor einem Jahr, dass von der KI-Forschung vielversprechende Ergebnisse erwartet werden. Spätestens seit bekannte Wissenschaftler wie Stephen Hawking und Unternehmer wie Elon Musk oder Bill Gates davor warnen, dass künstliche Intelligenz eine Bedrohung für die Menschheit darstellt, schlägt das KI-Thema hohe Wellen. Die Stiftung für Effektiven Altruismus (EAS, vormals GBS Schweiz) hat mit der Unterstützung von Experten/innen aus Informatik und KI ein umfassendes Diskussionspapier zu den Chancen (...) und Risiken der künstlichen Intelligenz verfasst und geht darin auf aktuelle, mittel- und langfristige Herausforderungen im Bereich der KI-Entwicklung ein. (shrink)

In this book, which thoroughly revises and greatly expands his classic work Sameness and Substance, David Wiggins retrieves and refurbishes in the light of twentieth-century logic and logical theory certain conceptions of identity, of substance and of persistence through change that philosophy inherits from its past. In this new version, he vindicates the absoluteness, necessity, determinateness and all or nothing character of identity against rival conceptions. He defends a form of essentialism that he calls individuative essentialism, and then a (...) form of realism that he calls conceptualist realism. In a final chapter he advocates a human being-based conception of the identity and individuation of persons, arguing that any satisfactory account of personal memory must make reference to the life of the rememberer himself. This important book will appeal to a wide range of readers in metaphysics, philosophical logic, and analytic philosophy. (shrink)

A leading political theorist’s groundbreaking defense of ideal conceptions of justice in political philosophy Throughout the history of political philosophy and politics, there has been continual debate about the roles of idealism versus realism. For contemporary political philosophy, this debate manifests in notions of ideal theory versus nonideal theory. Nonideal thinkers shift their focus from theorizing about full social justice, asking instead which feasible institutional and political changes would make a society more just. Ideal thinkers, on the other hand, question (...) whether full justice is a standard that any society is likely ever to satisfy. And, if social justice is unrealistic, are attempts to understand it without value or importance, and merely utopian? Utopophobia argues against thinking that justice must be realistic, or that understanding justice is only valuable if it can be realized. David Estlund does not offer a particular theory of justice, nor does he assert that justice is indeed unrealizable—only that it could be, and this possibility upsets common ways of proceeding in political thought. Estlund engages critically with important strands in traditional and contemporary political philosophy that assume a sound theory of justice has the overriding, defining task of contributing practical guidance toward greater social justice. Along the way, he counters several tempting perspectives, including the view that inquiry in political philosophy could have significant value only as a guide to practical political action, and that understanding true justice would necessarily have practical value, at least as an ideal arrangement to be approximated. Demonstrating that unrealistic standards of justice can be both sound and valuable to understand, Utopophobia stands as a trenchant defense of ideal theory in political philosophy. (shrink)

In this article, I take up Marcella Althaus-Reid’s queer strategy that pairs disaffiliation with intimate identification in order to draw out the possibilities and limits of queer strategies of resignification and denaturalization. I will use David M. Halperin’s work on gay femininity, abjection, and camp as the primary site to investigate these queer strategies. This article’s considerations have implications for recent directions taken in contemporary queer theology by challenging projects that presume a certain limitless capacity for queering or (...) that seek to appropriate almost anything – marriage, celibacy, or orthodoxy – as queer. Rather than seeking to mitigate complicity in misogyny or trying to recuperate misogynist theological positions by highlighting their subversive queerness, Althaus-Reid’s demands from queer theologians a prophetic, denunciatory posture that turns away from the imperial theological highways towards the queer ways of knowing and relating to the God at the margins of T-theology. (shrink)

Throughout the darkest moments of human history, evildoers have convinced communities to turn on groups that are regarded as in some way other and, by starting to think of them as less than human, persecute or even eliminate them. We can all recognize the unfathomable evils of dehumanization in slavery, the Holocaust, the Rwandan genocide, and the Jim Crow South, but we are not free from its power today. With climate change and political upheaval driving millions of refugees worldwide to (...) leave their homes, we are likely to see more and more of this ugly and persistent phenomenon. What are we to do? Drawing on his deep and wide-ranging knowledge of the history, psychology, and politics of dehumanization, David Livingstone Smith shows us how to recognize it and how to fight back. (shrink)

In _The Formation of Reason_, philosophy professor David Bakhurst utilizes ideas from philosopher John McDowell to develop and defend a socio-historical account of the human mind. Provides the first detailed examination of the relevance of John McDowell's work to the Philosophy of Education Draws on a wide-range of philosophical sources, including the work of 'analytic' philosophers Donald Davidson, Ian Hacking, Peter Strawson, David Wiggins, and Ludwig Wittgenstein Considers non-traditional ideas from Russian philosophy and psychology, represented by Ilyenkov and (...) Vygotsky Discusses foundational philosophical ideas in a way that reveals their relevance to educational theory and practice. (shrink)

In this new textbook two Catholic ethicists with extensive teaching experience present a moral theology based on vision. David Matzko McCarthy and James M. Donohue draw widely from the Western philosophical tradition while integrating biblical and theological themes in order to explore such fundamental questions as What is good? The fourteen chapters in Moral Vision are short and thematic. Substantive study questions engage with primary texts and encourage students to apply theory to everyday life and common human experiences. The (...) book is accessibly written and flexible enough to fit into any undergraduate or seminary course on ethics. (shrink)

Abstract Gene-selectionists define fundamental terms in non-standard ways. Genes are determinants of difference. Phenotypes are defined as a gene’s effects relative to some alternative whereas the environment is defined as all parts of the world that are shared by the alternatives being compared. Environments choose among phenotypes and thereby choose among genes. By this process, successful gene sequences become stores of information about what works in the environment. The strategic gene is defined as a set of gene tokens that combines (...) ‘actor’ tokens responsible for an effect with ‘recipient’ tokens whose replication is thereby enhanced. This set of tokens can extend across the boundaries of individual organisms, or other levels of selection, as these are traditionally defined. Content Type Journal Article Pages 1-19 DOI 10.1007/s10539-012-9315-5 Authors David Haig, Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA Journal Biology and Philosophy Online ISSN 1572-8404 Print ISSN 0169-3867. (shrink)

"Daimon Life is life-enchancing. To read it is to become richer in word." –John Llewelyn Disclosure of Martin Heidegger’s complicity with the National Socialist regime in 1933-34 has provoked virulent debate about the relationship between his politics and his philosophy. Did Heidegger’s philosophy exhibit a kind of organicism readily transformed into ideological "blood and soil"? Or, rather, did his support of the Nazis betray a fundamental lack of loyalty to living things? David Farrell Krell traces Heidegger’s political authoritarianism to (...) his failure to develop a constructive "life-philosophy"—his phobic reactions to other forms of being. Krell details Heidegger’s opposition to Lebensphilosophie as expressed in Being and Time, in an important but little-known lecture course on theoretical biology given in 1929–30 called "The Basic Concepts of Metaphysics," and in a recently published key text, Contributions to Philosophy, written in 1936–38. Although Heidegger’s attempt to think through the problems of life, sexual reproduction, behavior, environment, and the ecosystem ultimately failed, Krell contends that his methods of thinking nonetheless pose important tasks for our own thought. Drawing on and away from Heidegger, Krell expands on the topics of life, death, sexuality, and spirit as these are treated by Freud, Nietzsche, Derrida, and Irigaray. Daimon Life addresses issues central to contemporary philosophies of politics, gender, ecology, and theoretical biology. (shrink)

Using Kierkegaard's later religious writings as well as his earlier philosophical works, David Gouwens explores this philosopher's religious and theological thought, focusing on human nature, Christ, and Christian discipleship. He helps the reader approach Kierkegaard as someone who both analysed religion and sought to evoke religious dispositions in his readers. Gouwens discusses Kierkegaard's main concerns as a religious and, specifically, Christian thinker, and his treatment of religion using the dialectic of 'becoming Christian', and counters the interpretation of his religious (...) thought as privatistic and asocial. Gouwens appraises both the edifying discourses and the pseudonymous writings, including the particular problems posed by the latter. Between foundationalism and irrationalism, Kierkegaard's ideas are seen to anticipate the end of 'modernity', while standing at the centre of the Christian tradition. (shrink)

In this uplifting book, David Halpin suggests ways of putting the hope back into education, exploring the value of and need for utopian thinking in discussions of the purpose of education and school policy.

In this writing, David Hansen illuminates the aesthetic, moral, and epistemic meaning of bearing witness to teaching and teachers by drawing upon a recently completed field-based endeavor that included extensive school visits. Hansen shows how bearing witness can bring the inquirer close to the truth of teaching. However, the witness must undertake ethical work to ready her- or himself for the task. Even such readiness, which must be continuously re-won on each occasion, guarantees nothing. The witness in the classroom (...) must work with faith, hope, and a deep sense of the worthwhileness of teaching. Hansen suggests that the witness's practice as well as testimony regarding the work can have a valuable influence on the consciousness, and conscience, of all who concern themselves with teaching and teachers. (shrink)

David Gauthier; XII*—In the Neighbourhood of the Newcomb-Predictor (Reflections on Rationality), Proceedings of the Aristotelian Society, Volume 89, Issue 1, 1.

This paper defends the view that the asymmetry of causation can be explained in terms of probabilistic relationships between event types. Papineau first explores three different versions of the "fork asymmetry", namely David Lewis' asymmetry of overdetermination, the screening-off property of common causes, and Spirtes', Glymour's and Scheines' analysis of probabilistic graphs. He then argues that this fork asymmetry is both a genuine phenomenon and a satisfactory metaphysical reduction of causal asymmetry. In his final section he shows how this (...) reduction can account for the relevance of causal direction to human agency, and in particular for the fact that we can manipulate causes to influence their effects, but not vice versa. (shrink)

Truthmakers have come to play a central role in David Armstrong's metaphysics. They are the things that stand in the relation of truthmaking to truthbearers. This chapter focuses on the relation. More specifically, it discusses a thesis Armstrong holds about truthmaking that is of special importance to him; namely, the thesis that truthmaking is an internal relation. It explores what work this thesis is supposed to do for Armstrong, especially for this doctrine of the ontological free lunch, raising questions (...) and pointing out difficulties along the way. At the end of the chapter, it is shown that Armstrong's preferred truthbearers generate a serious difficulty for his thesis that the truthmaking relation is internal. (shrink)

In this book, which distills a lifetime of study, Foulkes shows that dreaming as we normally understand it--active stories in which the dreamer is an actor-...

Do we control what we believe? Are we responsible for what we believe? In a series of ten essays David Owens explores various different forms of control we might have over belief, and the different forms of responsibility these forms of control generate.

This paper provides a new approach to inference to the best explanation based on a new coherence measure for comparing how well hypotheses explain the evidence. It addresses a number of criticisms of the use of probabilistic measures in this context by Clark Glymour, including limitations of earlier work on IBE. Computer experiments are used to show that the new approach finds the truth with a high degree of accuracy in hypothesis selection tasks and that in some cases its accuracy (...) is greater than hypothesis selection based on maximizing posterior probability. Hence, by overcoming some of the problems with the previous approach, this work provides a more adequate defence of IBE and suggests that IBE not only tracks truth but also has practical advantages over the previous approach. Applications of the new approach to parameter estimation and model selection are also explored. (shrink)

Experiments involving delayed-choice entanglement swapping seem to suggest that particles can become entangled after they’ve already been detected. This astonishing result is taken by some to undermine realism about entanglement. In this paper, I argue that one can offer a fully realist explanation of delayed-choice entanglement swapping by countenancing timelike entanglement relations. I argue that such an explanation—radical though it may be—isn’t incoherent and doesn’t invite paradox. I compare this approach to the antirealist alternative and a more deflationary realist strategy (...) defended by Egg, each of which face certain challenges. The upshot is that we should take seriously the possibility of timelike entanglement and seek to develop a framework for quantum theory which allows for it. (shrink)

Book synopsis: David-Hillel Ruben's new book pursues some novel and unusual standpoints in the philosophy of action. He rejects, for example, the most widely held view about how to count actions, and argues for what he calls a 'prolific theory' of act individuation. He also describes and argues against the two leading theories of the nature of action, the causal theory and the agent causal theory. The causal theory cannot account for skilled activity, nor for mental action. The agent (...) causalist theory unnecessarily reifies causings. He identifies an assumption that they share, and that most action theorists have assumed to be unproblematic and uncontroversial, that an action is, or entails the existence of, an event. Several different meanings to that claim are disentangled and in the most interesting sense of that claim, Ruben denies that it is true. His own alternative is simple and unpretentious: nothing informative can be said about the nature of action that explicates action in any other terms. Ruben sketches a theory of causal explanation of action that eschews the requirement for laws or generalisations, and this effectively quashes one argument for the oft-repeated view that no explanations of action can be causal, on the grounds that there are no convincing cases of laws of human action. He addresses a number of questions about the knowledge an agent has of his own actions, looking particularly at examples of pathological cases of action in which, for one reason or another, the agent does not know what he is doing. Inspiring and enlightening in its challenge to received wisdom, and in its convincing defence of some unfashionable positions, Action and its Explanation will be required reading for anyone working in this field. (shrink)

In this groundbreaking book David Roberts sets out to demonstrate the centrality of the total work of art to European modernism since the French Revolution.

How good is an explanation and when is one explanation better than another? In this paper, I address these questions by exploring probabilistic measures of explanatory power in order to defend a particular Bayesian account of explanatory goodness. Critical to this discussion is a distinction between weak and strong measures of explanatory power due to Good (Br J Philos Sci 19:123–143, 1968). In particular, I argue that if one is interested in the overall goodness of an explanation, an appropriate balance (...) needs to be struck between the weak explanatory power and the complexity of a hypothesis. In light of this, I provide a new defence of a strong measure proposed by Good by providing new derivations of it, comparing it with other measures and exploring its connection with information, confirmation and explanatory virtues. Furthermore, Good really presented a family of strong measures, whereas I draw on a complexity criterion that favours a specific measure and hence provides a more precise way to quantify explanatory goodness. (shrink)

This book uncovers the lost history of Christianity's encounters with Pythagorean ideas before the Renaissance. David Albertson skillfully examines ancient and medieval theologians, particularly Thierry of Chartres and Nicholas of Cusa, who successfully reconceived the Trinity and the Incarnation within the framework of Greek number theory. David Albertson challenges modern assumptions about the complex relationship between religion and science.

David Johnson seeks to overthrow one of the widely accepted tenets of Anglo-American philosophy -- that of the success of the Humean case against the rational ...

This collection of essays by leading sinologists, historians, and philosophers both challenges and extends the work of David Nivison, whose contributions range across moral philosophy, religious thought, intellectual history, and Chinese language. Nivison himself replies to each essay.

Food - what we eat, how much we eat, how it is produced and prepared, and its cultural and ecological significance- is an increasingly significant topic not only for scholars but for all of us. Theology on the Menu is the first systematic and historical assessment of Christian attitudes to food and its role in shaping Christian identity. David Grumett and Rachel Muers unfold a fascinating history of feasting and fasting, food regulations and resistance to regulation, the symbolism attached (...) to particular foods, the relationship between diet and doctrine, and how food has shaped inter-religious encounters. Everyone interested in Christian approaches to food and diet or seeking to understand how theology can engage fruitfully with everyday life will find this book a stimulus and an inspiration. (shrink)

This article discusses what David Berliner (2005) has called the perverse ?spectacle of fear? (208) surrounding issues of teacher quality and accountability in contemporary school reform. Drawing principally on the critical semiotics of Roland Barthes' essay, ?The World of Wrestling? (1957), it examines the way that this spectacle works to undermine public education and explicates the powerful mythology behind it. The article then concludes with some suggestions on how this destructive ?spectacle of fear? might potentially be disrupted using the (...) agencies of Deweyan ?strong democracy? (shrink)

Simon Blackburn can be seen as challenging those committed to sui generis moral facts to explain the supervenience of the moral on the descriptive. We (like perhaps Derek Parfit) hold that normative facts in general are sui generis. We also hold that the normative supervenes on the descriptive, and we here endeavour to answer the generalization of Blackburn's challenge. In the course of pursuing this answer, we suggest that Frank Jackson's descriptivism rests on a conception of properties inappropriate to discussions (...) of normativity, and we see reason to reject descriptivism generally. We also discuss the views of David Brink, Jonathan Dancy and Bernard Williams in this area. (shrink)

Originally published in French in 1997 and appearing here in English for the first time, David Lapoujade's _William James: Empiricism and Pragmatism_ is both an accessible and rigorous introduction to James's thought and a pioneering rereading of it. Examining pragmatism's fundamental questions through a Deleuzian framework, Lapoujade outlines how James's pragmatism and radical empiricism encompass the study of experience and the making of reality, and he reopens the speculative side of pragmatist thought and the role of experience in it. (...) The book includes an extensive afterword by translator Thomas Lamarre, who illustrates how James's interventions are becoming increasingly central to the contemporary debates about materialist ontology, affect, and epistemology that strive to bridge the gaps among science studies, media studies, and religious studies. (shrink)

In Playing Politics with Science, David B. Resnik explores the philosophical, political, and ethical issues related to the politicalization of science and ...

Philosophers and theologians from around the world and throughout history have grappled with such fundamental issues as the nature of the world and man's relation to it, as well as the optimal forms of human perception, language and behaviour. Yet it has always been difficult to compare the works of thinkers from different eras and cultures. In this work of systematic philosophy, David Dilworth places the major texts of ancient and modern, and Western and Oriental philosphy and religion into (...) one comparative framework. His study reveals affinities between thinkers who lived centuries and continents apart and produces numerous insights by bringing together the greatest philosophical texts into a single scheme. (shrink)

David Doat ,Olivier Sartenaer | : Peut-on raisonnablement penser qu’un même phénomène naturel, comme l’esprit par exemple, puisse en même temps être continu et discontinu avec les processus physico-chimiques qui conditionnent son advenue au monde ? Autrement dit, est-il possible de construire une philosophie de la nature qui rejette simultanément la dichotomie métaphysique et la pure identité, c’est-à-dire qui se situe sans contradiction sur la ligne de séparation entre le dualisme et le matérialisme ? En y répondant par l’affirmative, (...) John Dewey et Lloyd Morgan, deux pionniers respectifs du pragmatisme et de l’émergentisme au siècle dernier, ouvrirent la voie d’un nouveau naturalisme antiréductionniste. L’objectif de cet article est, d’une part, de montrer comment ces deux auteurs cherchèrent à relever ce défi en mobilisant le concept d’émergence ; d’autre part de préciser la nature des divergences d’interprétation et d’usage du concept chez Morgan et Dewey. | : Can we reasonably conceive of a given natural phenomenon, say, the mind, that can at the same time be continuous and discontinuous with the physico-chemical processes that give rise to it ? In other words, is it possible to vindicate a philosophy of nature that simultaneously rejects the metaphysical dichotomy and the pure identity, or that consistently stands on the line that separates dualism and materialism ? By answering these questions positively, John Dewey and Lloyd Morgan, respectively pioneers of 20th century pragmatism and emergentism, have opened a path towards a new antireductionist naturalism. The purpose of this paper is, on the one hand, to show how both authors have met this challenge through the use of the concept of emergence and, on the other hand, to explicate the different ways in which both authors have construed and used the concept of emergence. (shrink)

When in 2001 Earth Liberation Front activists drove metal spikes into hundreds of trees in Gifford Pinchot National Forest, they were protesting the sale of a section of the old-growth forest to a timber company. But ELF's communiqu on the action went beyond the radical group's customary brief. Drawing connections between the harms facing the myriad animals who make their home in the trees and the struggles for social justice among ordinary human beings resisting exclusion and marginalization, the dispatch declared, (...) "all oppression is linked, just as we are all linked," and decried the "patriarchal nightmare" in the form of "techno-industrial global capitalism." In Total Liberation, David Naguib Pellow takes up this claim and makes sense of the often tense and violent relationships among humans, ecosystems, and nonhuman animal species, expanding our understanding of inequality and activists' uncompromising efforts to oppose it. Grounded in interviews with more than one hundred activists, on-the-spot fieldwork, and analyses of thousands of pages of documents, websites, journals, and zines, Total Liberation reveals the ways in which radical environmental and animal rights movements challenge inequity through a vision they call "total liberation." In its encounters with such infamous activists as scott crow, Tre Arrow, Lauren Regan, Rod Coronado, and Gina Lynn, the book offers a close-up, insider's view of one of the most important--and feared--social movements of our day. At the same time, it shows how and why the U.S. justice system plays to that fear, applying to these movements measures generally reserved for "jihadists"--with disturbing implications for civil liberties and constitutional freedom. How do the adherents of "total liberation" fight oppression and seek justice for humans, nonhumans, and ecosystems alike? And how is this pursuit shaped by the politics of anarchism and anticapitalism? In his answers, Pellow provides crucial in-depth insight into the origins and social significance of the earth and animal liberation movements and their increasingly common and compelling critique of inequality as a threat to life and a dream of a future characterized by social and ecological justice for all. (shrink)

As a member of the National Science Advisory Board for Biosecurity, I was involved in early deliberations about the appropriateness of publishing this avian influenza research when manuscripts were referred to us from two scientific journals during their review process, via the U.S. government. As described by David Resnik in this issue, we grappled with benefits and risks, and in our initial, unanimous decision recommended limited publication, alerting the world to the possibility of evolved transmissibility in these viruses but (...) with redaction of the exact genetic mutations that would enable anyone skilled in the art to synthesize these potentially dangerous viruses. However, after additional discussion, both internal and external to the board, we were asked to reconsider the situation, and this time a majority voted in favor of full publication. I was one of the minority that opposed full publication. Resnik points to the difficulties of performing a formal risk‐benefit assessment without the means of quantifying these two terms and suggests application of reasoning based on the precautionary principle instead. This makes sense. But there are three other issues that should be highlighted. (shrink)

David Thomas takes a close look at the United Kingdom during the 1970s to examine the emergence of “electroculture.” Mapping class struggle, dispossession, and state violence onto a history of oil, Thomas makes the case that labor politics and energy politics are deeply intertwined.

Challenges the conventional view of the nature of time.

In Defense of Religious Liberty contains David Novak’s vigorous—and paradoxical—argument that the primacy of divine law is the best foundation for a secular, multicultural democracy. Novak presents his claim, which will astound both liberal and conservative advocates of democracy, in political, philosophical, and theological terms. He shows how the universal norms of divine law are knowable as natural law, that they are the best formulations of the human rights of life, liberty, and the pursuit of happiness, and that their (...) assertion includes an explicit recognition of God as cosmic lawgiver. Furthermore, Novak maintains that the seemingly disparate ideas of divine command, natural law, and human rights can be integrated into one overall political theory. Novak reveals this integration at work in the classical texts of his own Jewish tradition, as well as in the canonical philosophical tradition of the West, from Plato to the Stoics to Grotius to Kant. He also convincingly makes the case that those who reject any legitimate role for religion in discussions of public morality inevitably substitute arbitrary human power for divine command, arbitrary positive law for natural law, and arbitrary governmental entitlements for human rights that exist prior to the establishment of the state. Novak concludes that religious traditions like Judaism, precisely because they incorporate the doctrines of God the cosmic lawgiver, natural law, and human rights, provide the most coherent ontological foundation for democracy in today’s world. (shrink)

Plato's Affinity Argument for the Immortality of the Soul DAVID APOLLONI VROM Phaedo 78b to 8od, Socrates attempts to answer Simmias' fear that, even if the soul has existed eternally before birth, it might be dispersed and this would be the end of its existence. His answer is an argument which attempts to show that the soul is incomposite because it is similar to the Forms and dissimilar to physical objects. To date, this argument -- the so-called Aftin- ity (...) Argument -- has not received much sympathy from Plato's commentators, who universally consider it the weakest of Plato's arguments for the immortal- ity of the soul? The lack of sympathy and enthusiasm for this argument is not difficult to understand. Just consider the following outline of the argument. The soul is invisible, therefore the soul is more similar to the Invisible, i.e., the Forms, which are always the same, than are bodies, which are visible and which are constantly changing, and which are more similar to the Visible than is the soul. Further, the soul is more like the Always the Same in that when it uses the body to see or hear or perceive, it is "dragged" by the body into the Never the Same, and the soul "wanders and is confused and whirls as if intoxicated" insofar as the soul has come in contact with such things. Whereas when the soul considers by itself, it goes to the realm of the Forms, and ceases its wandering. Therefore the soul is more like the Always... (shrink)

It is often maintained that co-referential terms can be substituted for one another whilst preserving truth-value in extensional contexts, and preserving grammaticality in all contexts. Crispin Wright calls this claim ‘The Reference Principle’ . Since Wright defines extensional contexts as those in which truth-value is determined only by reference, it is the assertion about substitution salva congruitate that is significant. Wright argues that RP is the key to understanding how Frege came to hold, paradoxically, that the concept horse is not (...) a concept, and to providing a resolution to the paradox .RP and Wright's application of it to Frege's Paradox have recently been criticized by Oliver . 1 Oliver argues that the syntax of natural languages is too complicated for the failure of two terms to fit into the same forms of speech to indicate a difference in semantic significance: RP is, he claims, an empirical falsehood.I shall argue that, although Oliver's arguments show that RP is false as it stands, a revised version of the principle, employing a more robust notion of substitution, is nevertheless correct. I shall end by outlining the implications of this revision for the appeal to RP and for Wright's resolution of Frege's Paradox.1. Referring terms and referential positionOliver's case against RP appeals to an impressive array of counter-examples. For our purposes it will be useful to regard these as being of three sorts. The first sort can be dealt with relatively swiftly: examples of the second and third sorts are more challenging.The first sort of counter-example involves referring terms that feature as parts of complex referring expressions. Oliver's examples include ‘William’ in the complex expression ‘William the Conqueror’ . The substitution of expressions co-referential with ‘William’ into sentences employing the complex referring expression often results in ungrammatical …. (shrink)