The dark matter problem in astrophysics exposes an underappreciated weakness in the evidential warrant for General Relativity (GR). The "dark matter double bind" entails that GR gets no differential evidential support from dynamical phenomena occurring at scales larger than our solar system, as compared to members of a significant class of rival gravitation theories. These rivals are each empirically indistinguishable from GR for phenomena taking place at solar system scales, but make predictions that may differ radically from GR's at larger (...) scales. Thus the typical confidence in the universal applicability of GR is insufficiently warranted in the present evidential context. (shrink)

This paper compares four techniques for measuring the masses of galaxies and larger astrophysical systems from their dynamics. The apparent agreement of these techniques is sometimes invoked as reason for hypothesizing the existence of huge quantities of “dark matter” as the best solution to “the dynamical discrepancy”, the 100-fold disparity between the amount of mass visible in large scale astrophysical systems and the amount calculated from dynamics. This paper argues that the agreement, though suggestive, is not definitive. The coincident measurements (...) remain the best reason for preferring dark matter over revisions to General Relativity for solving the dynamical discrepancy, but the resulting warrant for this preference is weak. (shrink)

This dissertation examines the dynamical dark matter problem in twentieth century astrophysics from the point of view of History and Philosophy of Science. The dynamical dark matter problem describes the situation astronomers find themselves in with regard to the dynamics of large scale astrophysical systems such as galaxies and galaxy clusters: The observed motions are incompatible with the visible distribution matter given the accepted law of gravitation. This discrepancy has two classes of possible solutions: either there exists copious amounts of (...) some kind of matter that neither emits nor absorbs radiation , or the law of gravitation must be revised. ;Chapter 2 describes the physical and philosophical foundations of dynamical inferences---inferences from discrepancies between well-founded theoretical expectations and reliable observations to the characteristics of candidate solutions. Chapter 3 discusses the history of dark matter . Chapter 4 reviews the present evidence bearing on the dark matter problem. Chapter 5 evaluates the important candidate matter solutions in light of the available evidence. Chapter 6 evaluates two candidate gravitational solutions on evidential and methodological grounds, and addresses the problem of theory choice. I do not try to solve the dark matter problem, but to uncover and evaluate patterns of inference involved in evidential arguments for and against candidate solutions. ;I show that Newton's "Reasoning from Phenomena" is a good framework from which to understand what is going on in this field. I argue that "higher order" and especially non-dynamical evidence is the best hope for solving this problem in dynamics. This is so in part because of "the dark matter double bind": the very existence of the dark matter problem means that we cannot be sure of the overall matter distribution in astrophysical systems, and this in turn means that the observed motions by themselves cannot provide relative confirmation of any theory of gravitational interactions taking place at these scales. I use Newton's Rules of Reasoning to argue that we should retain General Relativity as our theory of gravity at galactic and greater scales, despite the lack of positive evidence to confirm it over its rivals at these scales. (shrink)

Peter Kosso discusses the weak gravitational lensing observations of the Bullet Cluster and argues that dark matter can be detected in this system solely through the equivalence principle without the need to specify a full theory of gravity. This paper argues that Kosso gets some of the details wrong in his analysis of the implications of the Bullet Cluster observations for the Dark Matter Double Bind and the possibility of constructing robust tests of theories of gravity at galactic and greater (...) scales. Even the Bullet Cluster evidence is not sufficiently detailed to allow precision tests of General Relativity that would distinguish it from its rivals at galactic and greater scales. Taking into account the total evidence available, we cannot rule out “ugly” solutions to the dynamical discrepancy in astrophysics that involve both a large quantity of dark matter and a theory of gravity whose predictions differ significantly from those of General Relativity for interactions taking place at galactic and greater scales. (shrink)

When a scientist is the first to perform a difficult type of observation and correctly interprets the result as a significant challenge to then-widely accepted core theories, and the result is later recognized as seminal work in a field of major importance, it is a surprise to find that that work was essentially ignored by the scientific community for thirty years. Such was the fate of the doctoral research on the rotations of the Andromeda Nebula (M31) conducted by Horace Welcome (...) Babcock (1912–2003), who went on to become a very prominent astronomer — in an entirely different sub-field, never working on the subject of his dissertation again. This paper seeks to explain the ‘non-reception’ of Babcock’s work on galactic dynamics and the reasons he did no further work in that sub-field. In particular this paper shows that, contrary to the claims of some commentators, the non-reception of Babcock’s work should not be understood as an example of the unjust treatment of a young scientist by the conservative establishment. (shrink)

Baker argues that quantitative parsimony—the principle that hypotheses requiring fewer entities are to be preferred over their empirically equivalent rivals—is a rational methodological criterion because it maximizes explanatory power. Baker lends plausibility to his account by confronting it with the example of postulating of the neutrino in order to resolve a discrepancy in Beta decay experiments. Baker’s account is initially attractive, but I argue that its details are problematic and that it yields undesirable consequences when applied to the case of (...) astrophysical dark matter. Baker has not succeeded in showing why quantitative parsimony is a theoretical virtue. (shrink)

This paper defends David Hume's "Of Miracles" from John Earman's (2000) Bayesian attack by showing that Earman misrepresents Hume's argument against believing in miracles and misunderstands Hume's epistemology of probable belief. It argues, moreover, that Hume's account of evidence is fundamentally non-mathematical and thus cannot be properly represented in a Bayesian framework. Hume's account of probability is show to be consistent with a long and laudable tradition of evidential reasoning going back to ancient Roman law.

Hume says we never have grounds to believe in miracles. He’s right, but many commentators misunderstand his theory of probability and therefore his argument. This book shows that Humean probability descends from Roman law, and once properly contextualized historically and philosophically, Hume’s argument survives the criticisms leveled against it.

A review of Martin Harwit, Cosmic Messengers (2021).

Ethics, Policy & Environment, Volume 15, Issue 1, Page 131-132, March 2012.

The book falls into four segments. In the first (Chapter 1), the particular conception of deity that has been predominant in western civilization—the theistic idea of God—is explicated and distinguished from several other notions of the divine. The second segment considers the major reasons that have been advanced in support of the belief that the theistic God exists. In chapters 2 through 4 the three major arguments for the existence of God are discussed, arguments which appeal to facts supposedly available (...) to any rational person, whether religious or not. Chapter 5 considers religious and mystical experience as a source and justification for theistic belief. And in Chapter 6 we examine the role that faith may play in the formation and justification of religious belief. We also consider the important issue of whether belief in God may be entirely rational quite apart from any evidence in its behalf. The third segment undertakes an examination of the problem of evil, which some have thought to provide rational grounds for atheism, the belief that the theistic God does not exist. A number of topics quite central to theistic religion are considered in the fourth segment of the book, chapters 8 through 11. These topics include miracles, the question of life after death, problems in relating the idea of divine foreknowledge to the belief in human freedom, and problems arising from the existence of diverse religions. (shrink)

First published in 1980, and now substantially revised and enlarged, this panoramic survey of philosophic and religious thought, both ancient and modern, provides access to a wide array of ideas. More than just a dictionary, this well-designed reference work contains analytical commentary and historical accounts on a vast range of topics, select bibliographies attached to many of the entries, and considerable cross-referencing. The cross-references run from philosophic movements, to technical terms, to the positions of individual philosophers, thus encouraging a personal (...) exploration of the themes, movements, and thinkers of any particular school of thought. The end result is a reasonably compact single volume with many of the features of a multivolume encyclopedia. Reese covers both analytic and Continental philosophy, and includes a good deal of the history of philosophy. There are biographical entries for more than 900 ancient, medieval, and modern philosophers, for a total number of entries of over 4000. This new edition expands on the original treatment of religion and Asian philosophy and includes enlarged perspectives on Continental philosophy. Named "Outstanding Reference Work" by the American Library Association, the first edition was a Book-of-the-Month science pick and a selection of the Quality Paperback Book Club. Authoritative, comprehensive, clear, and interesting, The Dictionary of Philosophy and Religion will benefit the nonspecialist and specialist alike. (shrink)

This wide-ranging anthology of philosophical writings on the concept of God presents a systematic overview of the chief conceptions of deity as well as skeptical and atheistic critiques of theological ideas. The selections cover key philosophic developments in this subject area from ancient times to modern in both the East and West. Editors Hartshorne and Reese-two of the most highly respected scholars in the philosophy of religion-have not only selected many arresting passages from the world's great thinkers but have also (...) analyzed and evaluated the underlying ideas, showing how they fit into major, overarching systems of thought. Part One, "Classical Views," includes passages from ancient Egyptian, Indian, Chinese, and Judeo-Christian scriptures as well as philosophical writings from ancient Greece, the medieval church, and the Enlightenment. Part Two, "Modern Views," considers the ideas of more recent influential thinkers from diverse cultures and philosophical schools: Schelling, Peirce, Whitehead, Schweitzer, Buber, Radhakrishnan, and Watts, among others, are represented and discussed. Part Three, "Skeptical or Atheistic Views: Ancient and Modern," examines various kinds of skepticism and includes selections from Carneades, Buddha, Hume, Schopenhauer, Feuerbach, Nietzsche, Dennes, and Freud. Throughout their presentation the editors analyze and contrast theistic, atheistic, pantheistic, and panentheistic systems of thought. Philosophers Speak of God is a richly varied selection of high-quality writing on a perennial subject that will provide the serious student a thorough foundation in the philosophy of religion. (shrink)

According to a rights forfeiture theory of punishment, liability to punishment hinges upon the notion that criminals forfeit their rights against hard treatment. In this paper, I assume the success of rights forfeiture theory in establishing the permissibility of punishment but aim to develop the view by considering how forfeited rights might be reclaimed. Built into the very notion of proportionate punishment is the idea that forfeited rights can be recovered. The interesting question is whether punishment is the sole means (...) for reclaiming forfeited rights. I argue for a pluralistic theory of rights reclamation, according to which, there are multiple ways by which a wrongdoer can recapture her forfeited rights. In particular, I argue that offering remorseful compensation is a valid means by which a wrongdoer might partially, or fully, reclaim her right against punishment. (shrink)

Substantial discussion in the neuroethical literature has addressed the possibility that deep brain stimulation (DBS) and adaptive DBS (aDBS) could result in changes in personality, agency, and ide...

As science and religion researchers begin to engage questions of mental health, mindfulness may prove to be a fruitful area of investigation. However, quantifying the physical effects of mindfulness on the brain is difficult because mindfulness deals with the problem of mental and physical interaction or, the mind/body problem. One system of understanding which may aid science and religion scholars in the pursuit of mindfulness is traditional Chinese medicine (TCM). Within TCM, heart Qi manages the body's present connection to time (...) and space. If the “being in the moment” is disrupted, then the heart Qi is blocked and mental illness or various neurological disorders occur. Succinctly, within TCM, mindfulness is understood as a nonphysical phenomenon (Qi) which directly affects physical systems, resulting in empirical data. This is tracked and treated through the TCM understanding of Qi. The TCM view of Qi in mental health may therefore provide a helpful new paradigm to investigations concerning mindfulness and the human brain. (shrink)

Isaac Newton's Scientific Method examines Newton's argument for universal gravity and his application of it to resolve the problem of deciding between geocentric and heliocentric world systems by measuring masses of the sun and planets. William L. Harper suggests that Newton's inferences from phenomena realize an ideal of empirical success that is richer than prediction. Any theory that can achieve this rich sort of empirical success must not only be able to predict the phenomena it purports to explain, but (...) also have those phenomena accurately measure the parameters which explain them. Harper explores the ways in which Newton's method aims to turn theoretical questions into ones which can be answered empirically by measurement from phenomena, and to establish that propositions inferred from phenomena are provisionally accepted as guides to further research. This methodology, guided by its rich ideal of empirical success, supports a conception of scientific progress that does not require construing it as progress toward Laplace's ideal limit of a final theory of everything, and is not threatened by the classic argument against convergent realism. Newton's method endorses the radical theoretical transformation from his theory to Einstein's. Harper argues that it is strikingly realized in the development and application of testing frameworks for relativistic theories of gravity, and very much at work in cosmology today. (shrink)

Science can reinforce the healthy aspects of the politics of the policy process, to identify and further the public interest by discrediting policy options serving only special interests and helping to select among “science-confident” and “hedging” options. To do so, scientists must learn how to manage and communicate the degree of uncertainty in scientific understanding and prediction, lest uncertainty be manipulated to discredit science or to justify inaction. For natural resource and environmental policy, the institutional interests of government agencies, as (...) well as private interests, pose challenges of suppression, over-simplification, or distortion of scientific information. Scientists can combat these maneuvers, but must also look inward to ensure that their own special interests do not undermine the usefulness of science. (shrink)

Introduction: the Study of Argumentation Although our overall organization of the readings suggests one way of dividing our selected literature, ...

Background: Locke's Conception of Freedom For how can we think any one freer than to have the power to do what we will. — John Locke n his chapter on power ...

This paper deals with what a government funded development agency should do when a developing country imposes restrictions on the development process which discriminate on the basis of gender against some members of the development agency’s staff. The conclusion is that there are circumstances in which development agencies should continue their work in the face of gender discrimination but they should not instigate development projects if doing so would involve them in gender discrimination. A set of procedures for a development (...) agency to follow in these difficult circumstances is outlined. It is argued that an agency is entitled to violate a moral principle when so doing will reduce violations of that same principle. (shrink)

Can God Be Free? is a penetrating study of a central problem in philosophy of religion: can it be right to regard God as free, and as praiseworthy for being perfectly good? Allowing that he has perfect knowledge and perfect goodness, if there is a best world for God to create he would have no choice other than to create it. But if God could not do otherwise than create the best world, he created the world of necessity, not freely, (...) and we have no reason to be thankful to God for creating us, since he couldn't do otherwise. William Rowe proposes the need for some substantial revision in contemporary thinking about the nature of God. (shrink)

Can God Be Free? is a penetrating study of a central problem in philosophy of religion: can it be right to regard God as free, and as praiseworthy for being perfectly good? Allowing that he has perfect knowledge and perfect goodness, if there is a best world for God to create he would have no choice other than to create it. But if God could not do otherwise than create the best world, he created the world of necessity, not freely, (...) and we have no reason to be thankful to God for creating us, since he couldn't do otherwise. William Rowe proposes the need for some substantial revision in contemporary thinking about the nature of God. (shrink)

The conceptual framework of religion is more like the frame of a picture than the frame of a house; and what goes on within the frame is other than conceptual. This is the hypothesis motivating the analysis which follows. Given the hypothesis, the problem is to conceive what religion is - this other-than-conceptual enterprise which tends to attract conceptual frames. A possible answer is available in Wittgensteinian ‘seeing-as’. A number of philosophers of religion have recently exercised this option. The present (...) paper adds to their work by comparing a number of types of religious seeing-as with the instances of visual ambiguity drawn on by Wittgenstein. (shrink)

A number of theologians and philosophers have found theodical value in the theme of divine solidarity with human suffering. To further develop this theme, I examine what it would mean to assert that Christ on the cross participated in a representative sample of human suffering. Particular attention is paid to Christ’s cry of dereliction. I argue that if God through Christ identified with the very worst kinds of human suffering on the cross, then the cry of dereliction should be interpreted (...) as indicating an epistemic break between God and Christ, and not merely an attentional disruption. According to this account, Christ’s death cry expressed his temporary inability to grasp the significance of his passion and death. In this way, Christ on the cross suffered the full effects of divine hiddenness, thus sharing with horror-sufferers the experience of meaning-negating suffering. (shrink)