Disputing the Unity of the World: The Importance of Res and the Influence of Averroes in Giles of Rome's Critique of T homas Aquinas concerning the Unity of the World G. j. MCALEER 1. INTRODUCTION tILES OF ROME earned, after a decidedly difficult start, the most complete honors open to an academic religious in the Middle Ages. Joining the Hermits of St. Augustine at age 14, he became the first regent master of his order at the University of Paris ; (...) his works were made compul- sory in the education of students entering the Hermits in 1287; finally, in 1292 he became the general of the order itself.' Giles is significant, as Mandonnet puts it, because he "est incontestablement au premier rang des th~ologiens de la fin du XIII e si~cle. "2 But this is not all. Giles is also important to the period because his writings were censured by the same commission that composed the famous Parisian condemnation of 1277. As a result of this I would like to thank Robert Wielockx, Jos Decorte, Jennifer DeRose, and especially two anonymous referees of theJHP, for their extremely useful comments on an earlier draft of this paper. P. Nash, "Giles of Rome," New Catholic Eneydopedia, vol. 6 , 485 9 "P. Mandonnet, O. P., "La carri6re scolaire de Gilles de Rome," Revue des sciences philosophiques et thlologiques 4 09t~ 497. [~9] 3 ~ JOURNAL OF THE HISTORY OF PHILOSOPHY 36: I JANUARY 1998 censure, Giles had to leave.. (shrink)

© 2017. The American Astronomical Society. All rights reserved.We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J and H bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au orbit with a 68% confidence interval between 14 and 28 au, an eccentricity (...) of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object. (shrink)

Sir Francis Bacon, statesman, essayist and philosopher, studied law and rose to high office as Lord Chancellor. He had enormous influence on the change of direction for scientific method from speculative and philosophical in the Aristotelian tradition to experimental and factual. Bacon's philosophical influence extended to Locke and through him to subsequent English schools of psychology and ethics. Abroad, his influence also extended to Leibniz, Huygens and Voltaire who called him 'le pere de la philosophie experimentale'. This edition contains all (...) Bacon's philosophical works as well as translations, plus literary and professional works, and includes illuminating introductions and explanatory footnotes by the three editors as well as a new introduction by Graham Rees. (shrink)

Michael A. PetersBeijing Normal UniversityMy deepest condolences to Pepe, Dom and Marcus and to Jim’s grandchildren. Tina and I spent a lot of time at the Marshall family home, often attending dinn...

Part I: The Life of Cognitive Science:. William Bechtel, Adele Abrahamsen, and George Graham. Part II: Areas of Study in Cognitive Science:. 1. Analogy: Dedre Gentner. 2. Animal Cognition: Herbert L. Roitblat. 3. Attention: A.H.C. Van Der Heijden. 4. Brain Mapping: Jennifer Mundale. 5. Cognitive Anthropology: Charles W. Nuckolls. 6. Cognitive and Linguistic Development: Adele Abrahamsen. 7. Conceptual Change: Nancy J. Nersessian. 8. Conceptual Organization: Douglas Medin and Sandra R. Waxman. 9. Consciousness: Owen Flanagan. 10. Decision Making: J. Frank (...) Yates and Paul A. Estin. 11. Emotions: Paul E. Griffiths. 12. Imagery and Spatial Representation: Rita E. Anderson. 13. Language Evolution and Neuromechanisms: Terrence W. Deacon. 14. Language Processing: Kathryn Bock and Susan M. Garnsey. 15. Linguistics Theory: D. Terence Langendoen. 16. Machine Learning: Paul Thagard. 17. Memory: Henry L. Roediger III and Lyn M. Goff. 18. Perception: Cees Van Leeuwen. 19. Perception: Color: Austen Clark. 20. Problem Solving: Kevin Dunbar. 21. Reasoning: Lance J. Rips. 22. Social Cognition: Alan J. Lambert and Alison L. Chasteen. 23. Unconscious Intelligence: Rhianon Allen and Arthur S. Reber. 24. Understanding Texts: Art Graesser and Pam Tipping. 25. Word Meaning: Barbara C. Malt. Part III: Methodologies of Cognitive Science:. 26. Artificial Intelligence: Ron Sun. 27. Behavioral Experimentation: Alexander Pollatsek and Keith Rayner. 28. Cognitive Ethology: Marc Bekoff. 29. Deficits and Pathologies: Christopher D. Frith. 30. Ethnomethodology: Barry Saferstein. 31. Functional Analysis: Brian Macwhinney. 32. Neuroimaging: Randy L. Buckner and Steven E. Petersen. 33. Protocal Analysis: K. Anders Ericsson. 34. Single Neuron Electrophysiology: B. E. Stein, M.T. Wallace, and T.R. Stanford. 35. Structural Analysis: Robert Frank. Part IV: Stances in Cognitive Science:. 36. Case-based Reasoning: David B. Leake. 37. Cognitive Linguistics: Michael Tomasello. 38. Connectionism, Artificial Life, and Dynamical Systems: Jeffrey L. Elman. 39. Embodied, Situated, and Distributed Cognition: Andy Clark. 40. Mediated Action: James V. Wertsch. 41. Neurobiological Modeling: P. Read Montague and Peter Dayan. 42. Production Systems: Christian D. Schunn and David Klahr. Part V: Controversies in Cognitive Science:. 43. The Binding Problem: Valerie Gray Hardcastle. 44. Heuristics and Satisficing: Robert C. Richardson. 45. Innate Knowledge: Barbara Landau. 46. Innateness and Emergentism: Elizabeth Bates, Jeffrey L. Elman, Mark H. Johnson, Annette Karmiloff-Smith, Domenico Parisi, and Kim Plunkett. 47. Intentionality: Gilbert Harman. 48. Levels of Explanation and Cognition Architectures: Robert N. McCauley. 49. Modularity: Irene Appelbaum. 50. Representation and Computation: Robert S. Stufflebeam. 51. Representations: Dorrit Billman. 52. Rules: Terence Horgan and John Tienson. 53. Stage Theories Refuted: Donald G. Mackay. Part VI: Cognitive Science in the Real World:. 54. Education: John T. Bruer. 55. Ethics: Mark L. Johnson. 56. Everyday Life Environments: Alex Kirlik. 57. Institutions and Economics: Douglass C. North. 58. Legal Reasoning: Edwina L. Rissland. 59. Mental Retardation: Norman W. Bray, Kevin D. Reilly, Lisa F. Huffman, Lisa A. Grupe, Mark F. Villa, Kathryn L. Fletcher, and Vivek Anumolu. 60. Science: William F. Brewer and Punyashloke Mishra. Selective Biographies of Major Contributors to Cognitive Science: William Bechtel and Tadeusz Zawidzki. (shrink)

What's Wrong?: Applied Ethicists and Their Critics is a thorough and engaging introduction to applied ethics that covers virtually all of the issues in the field. Featuring more than ninety-five articles, it addresses standard topics--such as abortion, euthanasia, capital punishment, world hunger, and animal rights--and also delves into cutting-edge areas like cloning, racial profiling, same-sex marriage, prostitution, and slave reparations. The volume includes seminal essays by prominent philosophers (Robert Nozick, James Rachels, Peter Singer, and Judith Jarvis Thomson) alongside (...) work by newer voices in the field. Employing a unique approach to teaching argumentation, editors David Boonin and Graham Oddie unify the wealth of material presented in this collection. Each chapter opens with a featured article that takes a strong stand on a particular issue; the essays that immediately follow offer objections and critical responses to the arguments put forth in the featured selection. This format helps students learn how to better engage in debates because it illustrates how philosophers argue with each other. In addition, a general introduction describes strategies for understanding and evaluating the different types of arguments contained in the readings, while detailed chapter introductions enable students to see precisely how the arguments presented in the various writings are related to one another. Discussion questions and suggestions for further reading are included for each chapter. Ideal for courses in introduction to ethics and applied ethics/contemporary moral problems, What's Wrong? can also be used in critical thinking courses that emphasize philosophical argumentation. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Editors’ NoteJames M. DuBois, Ana S. Iltis, and Heidi A. WalshFrom childhood, David Slakter had undergone tests and invasive procedures to monitor his nephritis. It was not a surprise when in 2015, doctors told him he needed a kidney transplant. The wife of a childhood friend was a close match and gave him one of her kidneys. Before his transplant, aerobic exercise was difficult; a few months after transplant, (...) Slakter could ride his bike, hike, and work out with a personal trainer. He no longer had to weigh food or gauge his potassium consumption, a concern for people with kidney failure. For Slakter, “life post-transplant has been a significant improvement.”Individuals or family members of those who have received an organ transplant from a living or deceased donor share their stories in this issue of Narrative Inquiry in Bioethics. The symposium is titled “Receiving the Gift of Life: Stories from Organ Transplant Recipients.” Organ transplantation can extend an individual’s life by decades. It can also greatly improve an individual’s quality of life, as was Slakter’s experience. At the same time, organ transplantation is expensive and stressful. Recipients can experience complications, including organ rejection, and there are few appealing alternatives.After her heart transplant, author Leilani R. Graham required four open-heart surgeries, ECMO, and an intra-aortic balloon pump. She experienced delirium, necrotizing pneumonia, and severe muscular atrophy that required her to re-learn how to walk. She struggled with weight gain, explosive mood swings, hair loss, and was terrified that her body would reject the new heart. For Graham, “[Transplant] was not the miracle [she] was hoping for.” Graham says she felt unprepared for and inadequately informed about what to expect after her transplant, which left her “battered, beaten, and bruised” with a 12-inch line from neck to navel and “bullet holes” up and down her torso from the chest tubes. When reflecting on her experience post-transplant, Graham says, “It wasn’t the physical trauma that hurt the most. It was that no one seemed surprised [by the aftereffects of transplant].” Seemingly no one, that is except Graham, who calls on transplant providers to “prioritize empathy.”The symposium editors are Jason T. Eberl and Tristan McIntosh. Three commentary articles, written by Macey Leigh Levan, Heather Lannon, and Vidya A. Fleetwood, Roslyn B. Mannon & Krista L. Lentine, offer important insights into the authors’ stories. The editors thank Mid-America Transplant, the UCSF Lung Transplant Program, Donor Connect, William L. Freeman, MD, MPH, MJIL, CIP, Janet Monk, and the individuals who gave anonymous donations to support the publication of this issue, an open-access VOICES edition of the symposium, and accompanying teaching guides.The research article in this issue, “‘A Shell of My Former Self’: Using Figurative Language to Promote Communication about Patient Suffering,” was written by Tyler Tate, Elizabeth Stein, and Robert A. Pearlman. The relief of suffering is a primary goal of medicine. However, the authors note that clinicians often miss or ignore suffering because they focus on the causes rather than the experience of suffering, or the subjective nature of suffering makes it difficult to discuss. The authors believe that “the key to communicating about suffering lies in finding [End Page vii] the right kind of words to describe the experience” and say that figurative language offers a promising approach. In their research, the authors performed qualitative analysis on 52 works of literature and identified 254 excerpts of figurative language with themes of non-physical or psychological suffering. The authors found 13 salient themes: brokenness, diminishment, disorientation, drowning, emptiness, imprisonment, battle, darkness, isolation, invisibility, lifelessness, punishment, and torture. The authors reiterate that developing a shared language of suffering could foster a therapeutic patient-clinician relationship and improve clinicians’ ability to recognize and address a patient’s experience of suffering.María Susana Ciruzzi wrote the first of two case studies included in this issue. “The Sword of King Solomon” addresses a tragic and difficult subject—how to navigate the situation posed by conjoined twins when “any decision will produce damage and suffering.” The case involves two infant male patients born at 37 weeks gestation as omphalo-ischiopagus conjoined twins... (shrink)

Newton's bucket, Einstein's elevator, Schrödinger's cat – these are some of the best-known examples of thought experiments in the natural sciences. But what function do these experiments perform? Are they really experiments at all? Can they help us gain a greater understanding of the natural world? How is it possible that we can learn new things just by thinking? In this revised and updated new edition of his classic text _The Laboratory of the Mind_, James Robert Brown continues (...) to defend apriorism in the physical world. This edition features two new chapters, one on “counter thought experiments” and another on the development of inertial motion. With plenty of illustrations and updated coverage of the debate between Platonic rationalism and classic empiricism, this is a lively and engaging contribution to the field of philosophy of science. (shrink)

THE SOCIOLOGICAL TURN The problem we are concerned with is just this: How should we understand science? Are we to account for scientific knowledge (or ...

In his long-awaited new edition of Philosophy of Mathematics, James Robert Brown tackles important new as well as enduring questions in the mathematical sciences. Can pictures go beyond being merely suggestive and actually prove anything? Are mathematical results certain? Are experiments of any real value?" "This clear and engaging book takes a unique approach, encompassing nonstandard topics such as the role of visual reasoning, the importance of notation, and the place of computers in mathematics, as well as traditional (...) topics such as formalism, Platonism, and constructivism. The combination of topics and clarity of presentation make it suitable for beginners and experts alike. The revised and updated second edition of Philosophy of Mathematics contains more examples, suggestions for further reading, and expanded material on several topics including a novel approach to the continuum hypothesis."--BOOK JACKET. (shrink)

This eye-opening book reveals how little we've understood about the ongoing pitched battles between the sciences and the humanities--and how much may be at ...

Let's begin with an old example. In De Rerum Naturua , Lucretius presented a thought experiment to show that space is infinite. We imagine ourselves near the alleged edge of space; we throw a spear; we see it either sail through the ‘edge’ or we see it bounce back. In the former case the ‘edge’ isn't the edge, after all. In the latter case, there must be something beyond the ‘edge’ that repelled the spear. Either way, the ‘edge’ isn't really (...) an edge of space, after all. So space is infinite. (shrink)

This study addresses a central theme in current philosophy: Platonism vs Naturalism and provides accounts of both approaches to mathematics, crucially discussing Quine, Maddy, Kitcher, Lakoff, Colyvan, and many others. Beginning with accounts of both approaches, Brown defends Platonism by arguing that only a Platonistic approach can account for concept acquisition in a number of special cases in the sciences. He also argues for a particular view of applied mathematics, a view that supports Platonism against Naturalist alternatives. Not only does (...) this engaging book present the Platonist-Naturalist debate over mathematics in a comprehensive fashion, but it also sheds considerable light on non-mathematical aspects of a dispute that is central to contemporary philosophy. (shrink)

This article discusses the important and influential views of John Burgess on the nature of mathematical rigour and John Norton on the nature of thought experiments. Their accounts turn out to be surprisingly similar in spite of different subject matters. Among other things both require a reconstruction of the initial proof or thought experiment in order to officially evaluate them, even though we almost never do this in practice. The views of each are plausible and seem to solve interesting problems. (...) However, both have problems and would seem not able to do justice to some interesting examples. They fail in similar ways. More pluralistic accounts of proof and of thought experiment could embrace aspects of each, while rejecting their claims to universality. An ideal account (not provided here) would contribute to _explanation_ and _understanding_ as well as evidence. These are important topics for future work. (shrink)

Examples of classic thought experiments are presented and some morals drawn. The views of my fellow symposiasts, Tamar Gendler, John Norton, and James McAllister, are evaluated. An account of thought experiments along a priori and Platonistic lines is given. I also cite the related example of proving theorems in mathematics with pictures and diagrams. To illustrate the power of these methods, a possible refutation of the continuum hypothesis using a thought experiment is sketched.

Feynman diagrams are now iconic. Like pictures of the Bohr atom, everyone knows they have something important to do with physics. Those who work in quantum field theory, string theory, and other esoteric fields of physics use them extensively. In spite of this, it is far from clear what they are or how they work. Are they mere calculating tools? Are they somehow pictures of physical reality? Are they models in any interesting sense? Or do they play some other kind (...) of role?It is safe to say they are linked to some sort of calculation tool, but after that it is far from clear. If you ask me how to get from Toronto to Montreal, I could respond two ways: I could tell you to drive north until you... (shrink)

_Philosophy of Mathematics_ is an excellent introductory text. This student friendly book discusses the great philosophers and the importance of mathematics to their thought. It includes the following topics: * the mathematical image * platonism * picture-proofs * applied mathematics * Hilbert and Godel * knots and nations * definitions * picture-proofs and Wittgenstein * computation, proof and conjecture. The book is ideal for courses on philosophy of mathematics and logic.

Everyone appreciates a clever mathematical picture, but the prevailing attitude is one of scepticism: diagrams, illustrations, and pictures prove nothing; they are psychologically important and heuristically useful, but only a traditional verbal/symbolic proof provides genuine evidence for a purported theorem. Like some other recent writers (Barwise and Etchemendy [1991]; Shin [1994]; and Giaquinto [1994]) I take a different view and argue, from historical considerations and some striking examples, for a positive evidential role for pictures in mathematics.

A defence of a priori knowledge of nature via thought experiments. The article is part of a pair, the counter-view argued by John Norton.

Professor James R. Flynn is renowned for his belief that the IQ gap between black and white Americans is not genetic, but environmental in origin. Flynn's controversial new book offers an alternative to the vision of American society popularized by Herrnstein and Murray in The Bell Curve and is a must-read for all those wanting to keep up to date with the IQ debate. It traces the history of American idealism from Jefferson to the followers of Leo Strauss; analyses (...) the black marriage market, the case for affirmative action, the folly of Iraq, and the liberal failure of will; and concludes with a powerful defence of humane ideals and human autonomy. With its clear and attractive prose, social scientists, philosophers and the general public will find this a unique and exciting book that will rearm American idealism with new ideas. (shrink)

Donald Coxeter died in 2003, at a ripe old age of 96. Though I had regularly seen him at mathematics talks in Toronto for over twenty years, I never felt rushed to seek him out. It seemed he would go on forever. His death left me regretting my missed opportunity and Siobhan Robert's excellent book makes me regret it even more. Like any good biography of an intellectual, King of Infinite Space contains personal details and mathematical achievements in some (...) detail. Thus, we learn of the traumatic effects on Coxeter of his parents' divorce, his search for a spouse, his vegetarianism, and his progressive politics. We also learn a fair bit about the kaleidoscopes he made while in Cambridge during his student days in order to study the symmetry properties of polyhedra. These involved mirrors that Coxeter had specially constructed for this purpose. Along the way we are treated to interesting tidbits, such as G.H. Hardy's detestation of mirrors . There are brief accounts of the brilliant notation Coxeter invented, known as Coxeter diagrams, and of course, the now famous Coxeter groups. Short appendices fill in a bit more detail. It is all very well done and thoroughly engrossing.Wittgenstein befriended Coxeter, who was part of the very small group to whom …. (shrink)

There is sufficient evidence that intellectual property rights are corrupting medical research. One could respond to this from a moral or from an epistemic point of view. I take the latter route. Often in the sciences factual discoveries lead to new methodological norms. Medical research is an example. Surprisingly, the methodological change required will involve political change. Instead of new regulations aimed at controlling the problem, the outright socialization of research seems called for, for the sake of better science. I (...) appeal to an analogy between socialized medicine and socialized research. †To contact the author, please write to: Department of Philosophy, University of Toronto, Toronto, Ontario M5R 2M8, Canada; e‐mail: [email protected]. (shrink)

Thought experiments provide us with scientific understanding and theoretical advances which are sometimes quite significant, yet they do this without new empirical input, and possibly without any empirical input at all. How is this possible? The challenge to empiricism is to give an account which is compatible with the traditional empiricist principle that all knowledge is based on sensory experience. Thought experiments present an enormous challenge to empiricist views of knowledge; so much so that some of us have thrown in (...) the towel and embraced good old fashioned platonism. I'll try to explain why one brand of empiricism, namely John Norton's argument view of thought experiments, won't work. (shrink)

Surprisingly, the dimples on a golf ball (typically around 300-400) cannot be spaced evenly on the surface. I will explain how this is connected to the Platonic solids. The example is interesting, because it illustrates a difference between efficient and formal causation and explanation. I will discuss a few interesting consequences.

The Problem of Ethical Scepticism To deal with the problem of ethical scepticism , to show why it is of particular interest to political activists and ...

(1987). Einstein's brand of verificationism. International Studies in the Philosophy of Science: Vol. 2, No. 1, pp. 33-54. doi: 10.1080/02698598708573301.

Most disciplines make use of thought experiments, but physics and philosophy lead the pack with heavy dependence upon them. Often this is for conceptual clarification, but occasionally they provide real theoretical advances. In spite of their importance, however, thought experirnents have received rather little attention as a topic in their own right until recently. The situation has improved in the past few years, but a mere generation ago the entire published literature on thought experiments could have been mastered in a (...) long weekend. Now the subject is beginning to flourish. Given the relative newness of the field, it might be useful to have several examples at one’s finger tips, so a number of great ones will be described. Attention will also be drawn outside physics and philosophy. In mathematics there is something analogous to thought experiments -- visual reasoning and picture proofs. I will look briefly at this class of thought experiments and try using them to make a case for possibly settling the continuum hypothesis. After this, I will return to thought experiments in the sciences and propose an account of how they work. Finally, I will end with a sketch of a topic I am currently working on, a kind of progress report which, I hope, will be an inducement to others. (shrink)

From the 19th century the philosophy of science has been shaped by a group of influential figures. Who were they? Why do they matter? This introduction brings to life the most influential thinkers in the philosophy of science, uncovering how the field has developed over the last 200 years. Taking up the subject from the time when some philosophers began to think of themselves not just as philosophers but as philosophers of science, a team of leading contemporary philosophers explain, criticize (...) and honour the giants. Now updated and revised throughout, the second edition includes: - Easy-to-follow overviews of pivotal thinkers including John Stuart Mill, Rodolf Carnap, Thomas Kuhn and Karl Popper - Coverage of central issues such as experience and necessity, logical empiricism, the sociology of science and realism - An afterword looking ahead to emerging research trends - Study questions and further reading lists at the end of each chapter Philosophy of Science: The Key Thinkers demonstrates how the ideas and arguments of this group of key thinkers laid the foundations of our understanding of modern science. (shrink)

The principle of the common cause, which gets its justification from the miracle arguments, probably constitutes the best reason for being a scientific realist. However, results in quantum mechanics steming from the work of Bell raise difficulties which anti-realists have been quick to seize. The author tries to overcome the problem and save scientific realism by reformulating the principle of the common cause so that a distinction is made between a priori and a posteriori correlations.

A thought experiment involving an omniscient being and quantum mechanics is used to justify non-deductive methods in mathematics. The twin prime conjecture is used to illustrate what can be achieved.

There has been a sharp rise in private funding of medical research, especially in relation to patentable products. Several serious problems with this are described. A solution involving the elimination of patents and public funding administered through extended national health care systems is proposed.

Theories often run into paradoxes. Some of these are outright contradictions, sending the would-be champions of the theory back to the drawing board. Others are paradoxical in the sense of being bizarre and unexpected. The latter are sometimes mistakenly thought to be instances of the former. That is, they are thought to be more than merely weird; they are mistakenly thought to be self-refuting. Showing that they are not self-contradictory but merely a surprise is often a challenge. Notions of explanation (...) and understanding are often at issue. For instance, we might explain—or explain away—a paradox by invoking some mechanism provided by the theory and showing how it does not really lead to a logically incoherent .. (shrink)

Mathematics and ethics are surprisingly similar. To some extent this is obvious, since neither looks to laboratory experiments nor sensory experience of any kind as a source of evidence. Both are based on reason and something commonly call “intuition.” This is not all. Interestingly, mathematics and ethics both possess similar distinctions between pure and applied. I explore some of the similarities and draw methodological lessons from them. We can use these lessons to explore how and why Freiling’s refutation of the (...) continuum hypothesis might be justified. (shrink)

It's sometimes useful to start with a quiz, even if it seems irrelevant to the issues at hand. Suppose you have to organize a tennis tournament with, say, 1025 players. Match winners will go on to the next round while losers bow out until all have been eliminated except, of course, the final champion. Your problem is this: How many matches must you book for this tournament?

Starting from the assumption that the history of science is, in some significant sense, rational and thus that historical episodes may serve as evidence in choosing between competing normative methodologies of science, the question arises: "Just what is this history-methodology evidential relation?" After examining the proposals of Laudan, a more plausible account is proposed.

This paper explores whether it is justified to add any new taxa concerning informational states to our psychological taxonomy. Such exploration will not lead to a straightforward decision between remaining steadfast with the taxonomic _status quo_ and adding only one new taxon. A careful analysis of when one would be warranted in positing a new taxon for informational states will reveal similarly compelling reasons to posit all sorts of additional taxa. As an antidote to such proliferation, I suggest a reinforcement (...) of traditional taxonomies of the mental by allowing belief and a range of extant taxa to play their requisite explanatory roles, thereby obviating the need for the postulation of any novel taxa. (shrink)

Feynman diagrams have fascinated physicists and philosophers since they were introduced to the world about 70 years ago. Clearly, they help in calculation; they have allowed nearly impossible problems to be solved with relative ease. This is agreed by all, but that is probably where the consensus ends. Are they pictures of physical processes? Are they just devices for keeping track of mathematical formulae, that do the real work? Are they some sort of mix of both?They are almost as famous (...) as representations of the Bohr atom, even though most people could not give even a sketchy account of what they do. In spite of this they have taken on a role as a cultural icon. Feynman used them to decorate his own van.... (shrink)

We need only list a few of the well‐known thought experiments to be reminded of their enormous influence and importance in the sciences: Newton's bucket, Maxwell's demon, Einstein's elevator, Heisenberg's gamma‐ray microscope, Schrödinger's cat. The seventeenth century saw some of its most brilliant practitioners in Galileo, Descartes, Newton, and Leibniz. And in our own time, the creation of quantum mechanics and relativity are almost unthinkable without the crucial role played by thought experiments.