We describe our explicit Lorentz-invariant solution of the Einstein and null geodesic equations for the deflection experiment of 2002 September 8 when a massive moving body, Jupiter, passed within 3.7’ of a line-of-sight to a distant quasar. We develop a general relativistic framework which shows that our measurement of the retarded position of a moving light-ray deflecting body (Jupiter) by making use of the gravitational time delay of quasar’s radio wave is equivalent to comparison of the relativistic laws (...) of the Lorentz transformation for gravity and light. Because, according to Einstein, the Lorentz transformation of gravity field variables must depend on a fundamental speed c, its measurement through the retarded position of Jupiter in the gravitational time delay allows us to study the causal nature of gravity and to set an upper limit on the speed of propagation of gravity in the near zone of the solar system as contrasted to the speed of the radio waves. In particular, the v/c term beyond of the standard Einstein’s deflection, which we measured to 20% accuracy, is associated with the aberration of the null direction of the gravity force (“aberration of gravity”) caused by the Lorentz transformation of the Christoffel symbols from the static frame of Jupiter to the moving frame of observer. General relativistic formulation of the experiment identifies the aberration of gravity with the retardation of gravity because the speed of gravitational waves in Einstein’s theory is equal to the speed of propagation of the gravity force. We discuss the misconceptions which have inhibited the acceptance of this interpretation of the experiment. We also comment on other interpretations of this experiment by Asada, Will, Samuel, Pascual–Sánchez, and Carlip and show that their “speed of light” interpretations confuse the Lorentz transformation for gravity with that for light, and the fundamental speed of gravity with the physical speed of light from the quasar. For this reason, the “speed of light” interpretations are not entirely consistent with a retarded Liénard–Wiechert solution of the Einstein equations, and do not properly incorporate how the phase of the radio waves from the quasar is perturbed by the retarded gravitational field of Jupiter. Although all of the formulations predict the same deflection to the order of v/c, our formulation shows that the underlying cause of this deflection term is associated with the aberration of gravity and not of light, and that the interpretations predict different deflections at higher orders of v/c beyond the Shapiro delay, thus, making their measurement highly desirable for deeper testing of general relativity in future astrometric experiments like Gaia, SIM, and SKA. (shrink)

Mass ideology is unique to modern society and rooted in early modern philosophy. Traditionally, knowledge had been viewed as resting on metaphysics. Rejecting metaphysical truth evoked questions about the source of "truth." For nineteenth-century ideologists, "truth" comes either from dominating classes in a progressively determined history or from a post-Copernican freedom of the superior man to create it. In From Physics to Politics Robert C. Trundle, Jr. uncovers the relation of modern philosophy to political ideology. And in rooting truth in (...) human nature and Nature by modal reasoning, he resolves the problem of politicized truth. Our concepts of scientific truth, logic, and necessity are essentially connected. Modern philosophy restricts our understanding of necessity to the political dreams and aspirations of Enlightenment intellectuals. As a result, these intellectuals refuse to acknowledge as factual or meaningful whatever is not intelligible within the practical goals of establishing science as a system of enlightened ideas. The effect of these ideas is that in our time metaphysical principles, speculative truths, our understanding of science, and the nature of logic have become subordinated to ideological dreams. Fascism, Nazism, Marxism, political correctness, and moral relativism are not historical aberrations but essential consequences. Trundle's work is groundbreaking and daring, and his underlying thesis demonstrates why scientific truth demands a modal defense. The defense not only integrates science, ethics, and politics, but shows how "truth" may be ascribed to moral and scientific principles in contrast to a modern philosophical tradition. Since this tradition is the origin of political ideology, it has led to an irrational politicization of truth. The book will appeal particularly to those interested in political history, histories of philosophy, the philosophy of sciences, and ethics. Robert C. Trundle, Jr. is a member of the New York Academy of Sciences and the Scientific Research Society of Sigma Xi, an affiliate scholar for Idealistic Studies, and has served as reader for University de Laval's Laval Theologique et Philosphique. His publications include over three dozen articles in Res Publica, Logique et Analyse, Thought, Philosphy in Science, and New Horizons in the Philosophy of Science. His books include Beyond Absurdity (with R. Puligandla), Ancient Greek Philosophy, and Medieval Reasoning. He is currently professor in the department of social sciences and philosophy at Northern Kentucky University. (shrink)

_A wide ranging consideration of the work of contemporary ethicist David Wong._.

Cancer biology features the ascription of normal functions to parts of cancers. At least some ascriptions of function in cancer biology track local normality of parts within the global abnormality of the aberration to which those parts belong. That is, cancer biologists identify as functions activities that, in some sense, parts of cancers are supposed to perform, despite cancers themselves having no purpose. The present paper provides a theory to accommodate these normal function ascriptions—I call it the Modeling Account (...) of Normal Function (MA). MA comprises two claims. First, normal functions are activities whose performance by the function-bearing part contributes to the self-maintenance of the whole system and, thereby, results in the continued presence of that part. Second, MA holds that models of system-level activities that are (partly) constitutive of self-maintenance are improved by including a representation of the relevant function-bearing part and by making reference to the activity/activities that part performs which contribute(s) to those system-level activities. I contrast MA with two other accounts that seek to explicate the ascription of normal functions in biology, namely, the organizational account and the selected effects account. Both struggle to extend to cancer biology. However, I offer ecumenical readings which allow them to recover some ascriptions of normal function to parts of cancers. So, though I contend that MA excels in this respect, the purpose of this paper is served if it provides materials for bridging the gap between cancer biology, philosophy of cancer, and the literature on function. (shrink)

Relativism and expressivism offer two different semantic frameworks for grappling with a similar cluster of issues. What is the difference between these two frameworks? Should they be viewed as rivals? If so, how should we choose between them? This chapter sheds light on these questions. After providing an overview of relativism and expressivism, I discuss three potential choice points: their relation to truth conditional semantics, their pictures of belief and communication, and their explanations of disagreement.

Microscopy allows us to observe objects we cannot see with our eyes alone. With a light microscope, we can distinguish objects at the scale of the wavelengths of visible light just under a micrometer. Around 1870 Ernst Abbe, who laid the foundation of modern optics, suggested that the resolution of a microscope would improve by using some yet-unknown radiation with shorter wavelengths than visible light, that is, below 390 nanometers (1 nm = 10−9 m). Electrons can have wavelengths near 1 (...) picometer (1 pm = 10−12 m) and should therefore allow atoms to be distinguished since they are typically at least a few hundred pm apart. In this oversimplified view, further decreasing the wavelength of the radiation should allow us to increase the resolution of electron microscopy even more. However, this can only be done by increasing the energy of the radiation, which would ultimately destroy the samples. Other factors also affect the resolution of electron microscopes, among them non-ideal imaging properties of electromagnetic lenses, which result in false images. It took more than half a century to understand and control these aberrations and separate objects less than 1 Ångstrom (1 Å = 10−10 m) apart. (shrink)

Cappelen and Hawthorne present a powerful critique of fashionable relativist accounts of truth, and the foundational ideas in semantics on which the new relativism draws. They argue compellingly that the contents of thought and talk are propositions that instantiate the fundamental monadic properties of truth and falsity.

Relativism has been, in its various guises, both one of the most popular and most reviled philosophical doctrines of our time. Defenders see it as a harbinger of tolerance and the only ethical and epistemic stance worthy of the open-minded and tolerant. Detractors dismiss it for its alleged incoherence and uncritical intellectual permissiveness. Debates about relativism permeate the whole spectrum of philosophical sub-disciplines. From ethics to epistemology, science to religion, political theory to ontology, theories of meaning and even logic, philosophy (...) has felt the need to respond to this heady and seemingly subversive idea. Discussions of relativism often also invoke considerations relevant to the very nature and methodology of philosophy and to the division between the so-called “analytic and continental” camps in philosophy. And yet, despite a long history of debate going back to Plato and an increasingly large body of writing, it is still difficult to come to an agreed definition of what, at its core, relativism is, and what philosophical import it has. This entry attempts to provide a broad account of the many ways in which “relativism” has been defined, explained, defended and criticized. (shrink)

Machine generated contents note: CHAPTER 1. Cultural and Ethical Relativism -- I. Cultural Relativism -- II. Approval Theories -- III. Ethical Relativism -- IV. Institutionalism and Ethical Relationism -- CHAPTER 2. Positivism, Postmodernism and Ethical -- Relativism -- I. Metaethical Theories -- II. Positivism and Ethics -- III. Postmoder Cognitive Relativism -- IV Ethical Relativism -- CHAPTER 3. Cultural-Ethical Relativism: A Critique -- I. The Limited Validity of Cultural Relativism -- II. Approbation Theories -- III. 'Is' and 'Ought' Controversy -- (...) IV Some Further Arguments Concerning Ethical -- Relativism -- CHAPTER 4. Relativism: Positivist and Postmodern: -- A Critique -- I. Recapitulation -- II. Non-cognitivist Theories -- III. Postmodern Cognitive Relativism -- IV. Indeterminacy of Translation, Inscrutability of -- Reference, Conceptual Schemes, and -- Incommensurability -- V Some Further Comments --CHAPTER 5. Anti-Relativist Trends: Realism and -- Universali -- I. Introductory Remarks -- II. Realism: Metaphysical and Epistemological -- m. Realism and Ethical Discourse -- IV Ethical Universalism -- V Are Realism and Universalism Complementary? -- CHAPTER 6. The Moral Point of View -- I. Overridingness -- II. Objectivity and Universality -- II. Impartiality and Reversibility -- IV Equality and Justice -- V Towards Universal Morality -- CHAPTER 7. Self and Others -- I. Early Views -- II. Existentialist View -- III. Liberals and Communitarians -- IV. Kantian Perspective -- V Indian Perspective -- CHAPTER 8. A Rational Approach to Universal -- Morality -- I. Objectivity and Validity -- II. A Rational Approach -- II. Reason and Dialogue -- IV. Concluding Note. (shrink)

Cappelen and Hawthorne present a powerful critique of fashionable relativist accounts of truth, and the foundational ideas in semantics on which the new relativism draws. They argue compellingly that the contents of thought and talk are propositions that instantiate the fundamental monadic properties of truth and falsity.

This paper is about two topics: metaepistemological absolutism and the epistemic principles governing perceptual warrant. Our aim is to highlight—by taking the debate between dogmatists and conservativists about perceptual warrant as a case study—a surprising and hitherto unnoticed problem with metaepistemological absolutism, at least as it has been influentially defended by Paul Boghossian as the principal metaepistemological contrast point to relativism. What we find is that the metaepistemological commitments at play on both sides of this dogmatism/conservativism debate do not line (...) up with epistemic relativism nor do they line up with absolutism, at least as Boghossian articulates this position. What this case study reveals is the need in metaepistemological option space for the recognition of a weaker and less tendentious form of absolutism, what we call “environment relativism”. On this view, epistemic principles are knowable, objective, and they can serve as the basis of particular epistemic evaluations, but their validity is relative to the wider global environment in which they are applied. (shrink)

Aberrant Nuptials' explores the diversity and richness of the interactions between artistic research and Deleuze studies. "Aberrant nuptials" is the expression Gilles Deleuze uses to refer to productive encounters between systems characterised by fundamental difference. More than imitation, representation, or reproduction, these encounters foster creative flows of energy, generating new material configurations and intensive experiences. Within different understandings of artistic research, the contributors to this book - architects, composers, film-makers, painters, performers, philosophers, sculptors, and writers - map current practices at (...) the intersection between music, art, and philosophy, contributing to an expansion of horizons and methodologies. Written by established Deleuze scholars who have been working on interferences between art and philosophy, and by musicians and artists who have been reflecting Deleuzian and Post-Deleuzian discourses in their artworks, this volume reflects the current relevance of artistic research and Deleuze studies for the arts. (shrink)

The issue of realism about the physical world is distinct from the semantic issue of correspondence truth. So it is an aberration to identify the two issues (Dummett), to dismiss the realism issue out of hostility to correspondence truth (Rorty, Fine), to think that that issue is one of interpretation, or to argue against realism by criticizing various claims about truth and reference (Putnam, Laudan). It is also an aberration to identify realism with nonskepticism, truth-as-the-aim-of-science, or scientific convergence. (...) Realism is an overarching metaphysical issue which should be settled before any of these epistemic and semantic issues. (shrink)

The beginning of the twenty-first century saw something of a comeback for relativism within analytical philosophy. Relativism and Monadic Truth has three main goals. First, we wished to clarify what we take to be the key moving parts in the intellectual machinations of self-described relativists. Secondly, we aimed to expose fundamental flaws in those argumentative strategies that drive the pro-relativist movement and precursors from which they draw inspiration. Thirdly, we hoped that our polemic would serve as an indirect defence of (...) a traditional and natural picture concerning truth. According to this picture, what we call ‘Simplicity’, the fundamental structure of semantic reality is best revealed by construing truth as a simple monadic property of propositions that serve as the objects of belief, assertion, meaning and agreement. Our project was not a straightforward one. So-called relativists are not uniform in their key ideology, are often sloppy, casual, obscure or confused in their self-characterization, and differ in their argumentative emphasis among themselves and over time, thereby presenting a target that is both amorphous and shifty. This is an area where parties will frequently claim not to understand each other and where certain parties will sometimes accuse others of failing to make any sense at all. In such a situation, any effort to impose order will inevitably strike some parties as tendentious and unfair. That said, we felt that we had enough of …. (shrink)

This paper reviews arguments concerning the relation between relativism and tolerance, both whether tolerance entails relativism, and whether relativism entails tolerance. Two new arguments are offered to support the contention that there is no necessary relation between relativism and tolerance. In particular, building on the classic argument by Geoffrey Harrison, this paper argues that even if there is no strict dichotomy between facts and values, as Harrison had assumed, relativism still does not entail tolerance for every relativized perspective.

I investigate the implication of the truth-relativist’s alleged ‘ faultless disagreements’ for issues in the epistemology of disagreement. A conclusion I draw is that the type of disagreement the truth-relativist claims to preserve fails in principle to be epistemically significant in the way we should expect disagreements to be in social-epistemic practice. In particular, the fact of faultless disagreement fails to ever play the epistemically significant role of making doxastic revision rationally required for either party in a disagreement. That the (...) truth-relativists’ disagreements over centred content fail to play this epistemically significant role that disagreements characteristically play in social epistemology should leave us sceptical that disagreement is what the truth-relativist has actually preserved. (shrink)

ABSTRACT Contemporary relativists often see their view as contributing to a semantic/post-semantic account of linguistic data about disagreement and retraction. I offer an independently motivated metasemantic account of the same data, that also handles a number of cases and empirical results that are problematic for the relativist. The key idea is that the content of assertions and beliefs is determined in part by facts about other times, including times after the assertion is made or the belief is formed. On this (...) temporal externalist view, speaker behaviours such as retraction of previous assertions play a role in making it the case that a past utterance has a given meaning. (shrink)

The relativist's central objection to contextualism is that it fails to account for the disagreement we perceive in discourse about "subjective" matters, such as whether stewed prunes are delicious. If we are to adjudicate between contextualism and relativism, then, we must first get clear about what it is for two people to disagree. This question turns out to be surprisingly difficult to answer. A partial answer is given here; although it is incomplete, it does help shape what the relativist must (...) say if she is to do better than the contextualist in securing genuine disagreement. (shrink)

One of the first comprehensive treatments of Deleuzian thought. There is always something schizophrenic about logic in Deleuze, which represents another distinctive characteristic: a deep perversion of the very heart of philosophy. Thus, a preliminary definition of Deleuze's philosophy emerges: an irrational logic of aberrant movements. —from Aberrant Movements In Aberrant Movements, David Lapoujade offers one of the first comprehensive treatments of Deleuzian thought. Drawing on the entirety of Deleuze's work as well as his collaborations with Félix Guattari, from the (...) “transcendental empiricism” of Difference and Repetition to the schizoanalysis and geophilosophy of Anti-Oedipus and A Thousand Plateaus, Lapoujade explores the central problem underlying the delirious coherence of Deleuze's philosophy: aberrant movements. These are the movements that Deleuze wrests from Kantian idealism, Nietzsche's eternal return, and the nonsense of Lewis Carroll; they are the schizophrenic processes of the unconscious and the nomadic line of flight traversing history—in short, the forces that permeate life and thought. Tracing and classifying their “irrational logics” represent the quintessential tasks of Deleuzian philosophy. Rather than abstract notions, though, these logics constitute various modes of populating the earth—involving the human as much as the animal, physical, and chemical—and the affective, mental, and political populations that populate human thought. Lapoujade argues that aberrant movements become the figures in a combat against the forms of political, social, philosophical, aesthetic, and scientific organization that attempt to deny, counter, or crush their existence. In this study of a thinker whose insights, theoretical confrontations, and perverse critiques have profoundly influenced philosophy, literature, film, and art over the last fifty years, Lapoujade invites us to join in the discordant harmonies of Deleuze's work—and in the battle that constitutes the thought of philosophy, politics, and life. (shrink)

This chapter explores arguments, ideas, and practices related to relativism in social and cultural anthropology. It covers discussions about cultural relativism, methodological relativism, conceptual relativism, relativism about rationality, moral relativism, epistemic relativism, and ontological relativism.

The “classic” is a vexed term in the work of William Carlos Williams. He uses the category to describe both the stale classicism of T. S. Eliot and Ezra Pound and, conversely, the authentic, “aberrant” classic of James Joyce and surrealism. Analyzing unpublished archival manuscripts alongside the posthumously published collection of essays, The Embodiment of Knowledge, I approach the classic through Williams's theories of pedagogy. Williams parodies and rejects academic modes of reading that cling to the “malignant rigidities” of the (...) past. Yet Paterson and The Embodiment also theorize the reader's interpretive power to disrupt any homogenizing conformity latent in the literary tradition. This dissonant hermeneutics can recuperate the classics and represents a form of resistance to a binary logic of past versus present, or European versus American literature. (shrink)

Relativism, roughly put, is the view that truth and falsity, right and wrong, standards of reasoning, and procedures of justification are products of differing conventions and frameworks of assessment and that their authority is confined to the context giving rise to them. More precisely, ‘relativism’ covers views which maintain that—at a level of high abstraction—at least some class of things have properties they have not simpliciter, but only relative to a given framework of assessment, and correspondingly, that the truth of (...) claims attributing these properties holds only once the relevant framework of assessment is specified or supplied. Relativists characteristically insist, furthermore, that if something is only relatively so, then there can be no framework-independent vantage point from which the matter of whether the thing in question is so can be established. Relativism has been, in its various guises, both one of the most popular and most reviled philosophical doctrines of our time. Defenders see it as a harbinger of tolerance and the only ethical and epistemic stance worthy of the open-minded and tolerant. Detractors dismiss it for its alleged incoherence and uncritical intellectual permissiveness. Debates about relativism permeate the whole spectrum of philosophical sub-disciplines. From ethics to epistemology, science to religion, political theory to ontology, theories of meaning and even logic, philosophy has felt the need to respond to this heady and seemingly subversive idea. Discussions of relativism often also invoke considerations relevant to the very nature and methodology of philosophy and to the division between the so-called ‘analytic and continental’ camps in philosophy. And yet, despite a long history of debate going back to Plato and a still developing large body of writing, it is still difficult to come to an agreed definition of what, at its core, relativism is, and what philosophical import it has. This entry attempts to provide a broad account of the many ways in which ‘relativism’ has been defined, explained, defended and criticized. (shrink)

This article brings together two sets of data that are rarely discussed in concert; namely, disagreement and testimony data. I will argue that relativism yields a much more elegant account of these data than its major rival, contextualism. The basic idea will be that contextualists can account for disagreement data only by adopting principles that preclude a simple account of testimony data. I will conclude that, other things being equal, we should prefer relativism to contextualism. In making this comparative point, (...) I will also defend self-standing relativist accounts of disagreement and testimony data. (shrink)

Many times, what we say proves to be wrong. It might turn out that what we took to be a comforting remark was, in fact, making things worse. Or that a joke was inappropriate. Or that yelling out loud was rude. More importantly for this paper, there are plenty of cases in which what we said turns out to be false: we spoke without paying attention, we were misinformed or tricked, or we made a reasoning mistake. -/- A particular instance (...) of this latter phenomenon is when someone changes their perspective and doesn't find their previous assertions true anymore. For example, imagine that you used to like licorice as a child, and that you went around saying things like "Licorice is tasty." But, growing up, you find licorice too strong and quite boring; your tastes have changed. While the taste of licorice itself has not changed, you are not going around anymore uttering "Licorice is tasty." In fact, in certain cases, you might even think that what you said in your childhood was wrong - at least in light of your present preferences. -/- Sometimes we "take back" the assertions we made when we realize they are no longer true. Such speech acts of taking back can be performed in various ways: more formally, as effected in a court of law or when an official speaks to the press, or more informally in our day-by-day interactions. These acts of taking back are known as retraction. Retraction is usually achieved by employing certain linguistic markers ('I was wrong', 'I was mistaken', 'I retract', "Scratch that' etc.) that signal that the retractor takes their previous speech act to be faulty in a certain way. -/- This phenomenon has formed the basis for a popular argument used by relativists about a variety of natural language expressions (predicates of taste, epistemic modals, moral and aesthetic claims etc.) in support of their view. Recently, several considerations (mostly from contextualists about the same expressions), both from the armchair and based on empirical studies, have been offered to undercut the support retraction was thought to provide for relativism. In this paper, I consider and re-evaluate that support in light of both types of considerations, showing that neither of them decisively undermines it. However, to survive the contextualist counterattack, the relativist needs to pay a price: that is, she will be forced to make some concessions or rethink certain claims. I show what I think those concessions should be and what needs to be rethought (and how). The upshot is that, while the support retraction offers relativism is not as strong as initially believed, appeal to retraction remains a legitimate move in the debate. In section 1, I introduce the views in the debate and clarify the phenomenon of retraction and its dialectical role. Armchair data are investigated in section 2, proper experimental studies in section 3, while section 4 summarizes and concludes. (shrink)

There is a family of metaethical views according to which (i) there are no objectively correct moral standards and (ii) whether a given moral claim is true depends in some way on moral standards accepted by either an individual (forms of subjectivism) or a community (forms of relativism). This chapter outlines the three most important versions of this type of theories: old-fashioned subjectivism and relativism, contextualism and new wave subjectivism and relativism. It also explores the main advantages of these views (...) and the key objections to them. (shrink)

When we look back upon people in past societies, such as slaveholders and colonialists, we judge their actions to have been morally atrocious. Yet we should give some thought to how the future will judge us. Here I argue that future people are likely to regard our behavior as no better than that of the past. If these future people are to be believed, then we are morally hopeless; we have little chance of working out the moral truth for ourselves. (...) I argue that we ought to resist this conclusion, and that our best means for doing so it to reject moral objectivity and accept instead a form of time-linked moral relativism. (shrink)

For some relativists some of the time the evidence for their view is a puzzling data pattern: On the one hand, there's evidence that the terms in question exhibit some kind of content stability across contexts. On the other hand, there's evidence that their contents vary from one context of use to another. The challenge is to reconcile these two sets of data. Truth relativists claim that their theory can do so better than contextualism and invariantism. Truth relativists, in effect, (...) use an argument to the best explanation: they present data they claim to be able to handle better than any competing theory2. (shrink)

Semantic relativism maintains that the truth-value of some propositions is sensitive to a judge parameter, facilitating cases whereby a proposition can be true relative to one judge, but false relative to another. Most prominently, semantic relativism has been applied to predicates of personal tastes (PPTs). Recently, Lasersohn [2007. “Expressives, Perspective and Presupposition.” Theoretical Linguistics 33 (2): 223–230; 2017. Subjectivity and Perspective in Truth-Theoretic Semantics. Oxford: Oxford University Press] has urged an extension of semantic relativism to terms traditionally construed as expressives (...) including derogatory epithets (e.g. ‘asshole’) and, more tentatively, expressions like ‘damn’. In this paper, we challenge Lasersohn’s extension of relativism. Section 1 gives a background on semantic theories for expressives and on semantic relativism. In Section 2, we focus on Lasersohn’s [2007. “Expressives, Perspective and Presupposition.” Theoretical Linguistics 33 (2): 223–230] account where he attempts to apply relativism to a wider range of expressives. We argue that because PPTs and expressives have fundamentally different semantic functions, the prospects for a relativistic account are slim. Several problems are presented. Our focus is on the perspective sensitivity of expressive content and the phenomenon of projection failure, as both reveal a fundamental disparity between expressives and PPTs. (shrink)

Summary The twofold objective of this study is (1) to identify and give a brief review of the historical development of the various designs of early (pre-1850) telescope eyepieces, and (2) to determine by measurements and calculations the axial and lateral chromatic aberrations of a number of extant eyepieces from that period in order to provide basic data on which to judge the relative quality of different eyepiece forms. Eight distinct types of eyepieces containing one to five lens elements are (...) discussed and illustrated. The second objective was addressed by measuring the focal lengths of the individual lens elements and the lens spacings in each eyepiece. The data were processed by a ray-tracing program that yields the chromatic aberration (CA) and focal length of each of the eyepieces. Twenty-one telescopes from that period were studied in this way. Similar calculations were also made using data available in the literature on several additional historic telescopes. The conclusions drawn from the data are: (1) Telescopes with Galilean eyepieces have a smaller CA than those with Keplerian or Huygens eyepieces. (2) The two-lens Keplerian terrestrial eyepieces are demonstrated to have larger axial and lateral CA than any of the other eyepiece types. (3) Calculations from examples of telescopes by Divini and Campani for which data were available indicate that while the axial CAs of the two were the same, Campani's instrument had a much smaller lateral CA. (4) Five element eyepieces were found to be better corrected for CA than the early four-lens systems that replaced them. (5) This study tends to confirm the speculation that the reason makers of early achromatic telescopes overcorrected the objective lenses was to compensate for the CA of the eyepieces. (shrink)

Beginning with a historical overview of relativism, from Pythagoras in ancient Greece to Derrida and postmodernism, Maria Baghramian explores the resurgence of relativism throughout the history of philosophy. She then turns to the arguments for and against the many subdivisions of relativism, including Kuhn and Feyerabend's ideas of relativism in science, Rorty's relativism about truth, and the conceptual relativism of Quine and Putnam. Baghramian questions whether moral relativism leads to moral indifference or even nihilism, and whether feminist epistemology's concerns about (...) the very notion of objectivity can be considered a form of relativism. She concludes the relativism debate by assessing the recent criticisms such as Quine's argument from translation and Davidson's claim that even the motivations behind relativism are unintelligible. Finding these criticisms lacking, Baghramian proposes a moderate form of pluralism which addresses the legitimate worries that give rise to relativism without incurring charges of nihilism or anarchy. (shrink)

Thoroughgoing relativists typically dismiss the realist conviction that competing theories describe just one definite and mind-independent world-structure on the grounds that such theories fail to be relatively translatable even though they are equally correct. This line of argument allegedly brings relativism into direct conflict with the metaphysics of realism. I argue that this relativist line of reasoning is shaky by deriving a theorem about relativistic inquiry in formal epistemology—more specifically, in the approach Kevin Kelly has dubbed “logic of reliable (...) inquiry”. According to the theorem, two scientists, who share some background knowledge but follow different appropriately reliable methods, will converge to relatively formally translatable competing theories, even if meaning, truth, logic and evidence are allowed to vary in time depending on each scientist’s conjectures, actions, or conceptual choices. Some final remarks on the relevance of the theorem to the incommensurability thesis that has vexed twentieth century philosophy of science are adduced. (shrink)

IntroductionIdeas of reference are frequent in psychopathology, mainly in psychotic disorders. The frequency of IR and preoccupation about them are related to the psychotic dimension, and to a lesser extent, to negative or emotional disorganized dimensions. Aberrant salience, has been proposed as an indicator of the onset of psychosis, particularly of schizophrenia. This study analyzed the mediating role of AS, disorganized symptoms and preoccupation about IR in the relationship between IR and the psychotic dimension.MethodThe sample consisted of 330 participants, 62.4% (...) of whom were women aged 18–79. The Referential Thinking Scale, the Aberrant Salience Inventory, and the Brief Psychiatric Rating Scale were administered.ResultsEvidence of a partial mediation model showed that the relationships between IR and the psychotic dimension were mediated jointly by AS and the disorganized dimension, and preoccupation about IR no longer had a role. This relationship was significantly influenced by participant age. The variables in the model explained 54.16% of the variance.ConclusionThe model proposed enabled a set of vulnerabilities to be predicted that could lead to a high-risk general pathological state and proneness to psychosis in particular. These findings are discussed with regard to early detection and prevention of psychosis. (shrink)

Relativism is central to the social sciences for the simple reason that customs and morals are diverse, and explaining this diversity is one of its major tasks. The explanations have relativistic implications, but they vary according to the type of explanation. In the nineteenth century evolutionary explanations dominated: differences were relative to stages. The social determination of ideas followed from these accounts, but could be logically separated from them. In the twentieth century, accounts based on the culture concept, understood (...) loosely in neo-Kantian terms as a matter of different shared presuppositions, dominated. This conception informed a relativistic methodological approach to history and disciplinary differences, exemplified in the methodological writings of Max Weber, where they were related to values. This was more radical, in the sense that there was no further explanation of the presuppositions. They simply differed. As this conception was expanded into the epistemic realm, it became even more radical, by being applied to science itself. The “Strong Programme in the sociology of science” observed a principle of symmetry, which held that true and false scientific beliefs needed to be explained using the same explanatory tools. In each of these cases problems of reflexivity and self-undermining played a role. (shrink)

Moral relativism attracts and repels. What is defensible in it and what is to be rejected? Do we as human beings have no shared standards by which we can understand one another? Can we abstain from judging one another's practices? Do we truly have divergent views about what constitutes good and evil, virtue and vice, harm and welfare, dignity and humiliation, or is there some underlying commonality that trumps it all? These questions turn up everywhere, from Montaigne's essay on cannibals, (...) to the UN Declaration of Human Rights, to the debate over female genital mutilation. They become ever more urgent with the growth of mass immigration, the rise of religious extremism, the challenges of Islamist terrorism, the rise of identity politics, and the resentment at colonialism and the massive disparities of wealth and power between North and South. Are human rights and humanitarian interventions just the latest form of cultural imperialism? By what right do we judge particular practices as barbaric? Who are the real barbarians? In this provocative new book, the distinguished social theorist Steven Lukes takes an incisive and enlightening look at these and other challenging questions and considers the very foundations of what we believe, why we believe it, and whether there is a profound discord between "us" and "them.". (shrink)

Uttered language does not necessarily reflect the planned communications of schizophrenia patients, nor do their delusions necessarily reflect basic failures of inferential reasoning. The role of inhibitory failure in the production of speech and the role of primary experiences of discrepancy between intention and action, and between experience–based expectations and perceived realities account for many of the clinical phenomena that have led to the conclusion that these patients have a ‘thought’ disorder, or a ‘disturbed’ mind. The alternatives and the evidence (...) are summarized in this paper. (shrink)

This chapter contains sections titled: Abstract From the Epistemology of Disagreement to Epistemic Relativism The Irrelevance of Epistemic Externalism Wittgensteinian Epistemology and Epistemic Relativism Williams's Wittgensteinian Contextualism Wittgensteinian Epistemology Reconsidered Concluding Remarks References.

Contemporary issues involving knowledge and science examined from a constructivist-pragmatist perspective often labeled "relativism." Individual chapters include a review of the difference between constructivist-pragmatist epistemology and "social constructivism;" an examination of recent writings by Bruno Latour; a critique of computational methods in literary studies; a skeptical look at current efforts to "integrate" the humanities and the natural sciences; and reflections on the social dynamics of belief in relation to denials of climate change and to hopes expressed by environmentalists.