We attempt to clarify the main conceptual issues in approaches to ‘objectification’ or ‘measurement’ in quantum mechanics which are based on superselection rules. Such approaches venture to derive the emergence of classical ‘reality’ relative to a class of observers; those believing that the classical world exists intrinsically and absolutely are advised against reading this paper. The prototype approach (K. Hepp, Helv. Phys. Acta45 (1972), 237–248) where superselection sectors are assumed in the state space of the apparatus is shown to (...) be untenable. Instead, one should couple system and apparatus to an environment, and postulate superselection rules for the latter. These are motivated by the locality of any observer or other (actual or virtual) monitoring system. In this way ‘environmental’ solutions to the measurement problem (H.D. Zeh, Found. Phys.1 (1970), 69–76; W. H. Zurek, Phys. Rev.D26 (1982), 1862–1880 and Progr. Theor. Phys.89 (1993), 281–312) become consistent and acceptable, too. Points of contact with the modal interpretation are briefly discussed. We propose a minimal value attribution to observables in theories with superselection rules, in which only central observables have properties. In particular, the eigenvector-eigenvalue link is dropped. This is mainly motivated by Ockham's razor. (shrink)

The Travail of Nature shows that the theological tradition in the West is neither ecologically bankrupt, as some of its popular and scholarly critics have maintained, nor replete with immediately accessible, albeit long-forgotten, ecological riches hidden everywhere in its deeper vaults, as some contemporary Christians, who are profoundly troubled by the environmental crisis and other related concerns, might wistfully hope to find. This is why it is appropriate to speak of the ambiguous ecological promises of Christian theology.

Introduction: The Dutch Euthanasia Act states that euthanasia is not punishable if the attending physician acts in accordance with the statutory due care criteria. These criteria hold that: there should be a voluntary and well-considered request, the patient’s suffering should be unbearable and hopeless, the patient should be informed about their situation, there are no reasonable alternatives, an independent physician should be consulted, and the method should be medically and technically appropriate. This study investigates whether physicians experience problems with these (...) criteria in medical practice.Methods: In 2006, questionnaires were sent to a random, stratified sample of 2100 Dutch physicians . Physicians were asked about problems in their decision-making related to requests for euthanasia or assisted suicide after enforcement of the 2002 Euthanasia Act.Results: Of all physicians who had received a request for euthanasia or assisted suicide , 25% had experienced problems in the decision-making with regard to at least one of the criteria of due care. Physicians who had experienced problems mostly indicated to have had problems related to evaluating whether or not the patient’s suffering was unbearable and hopeless and whether or not the patient’s request was voluntary or well considered .Discussion: Physicians in The Netherlands most frequently reported problems related to aspects in which they have to evaluate the patient’s subjective perspective. However, it can be questioned whether placing emphasis on these subjective aspects is an adequate fulfilment of the duties imposed on physicians, as laid down in the Dutch Euthanasia Act. (shrink)

Islamic philosophy; Hanbalites; doctrines; creation (Islam); early works to 1800.

The subject of my lecture is an appropriate one for several reasons. The first is purely chronological. Hume's first and greatest work, the Treatise of Human Nature, was published in 1739, two hundred years ago. Its illustrious author was then quite unknown in the world, and as he tells us himself the book “fell dead-born from the press.” But by the end of the eighteenth century its reputation was securely established, and it has long been regarded as one of the (...) masterpieces of European thought, and as the classical statement of the Empiricist Philosophy. It is true that, like other classics, it has had its ups and downs. During the Absolute Idealist period, which ended early in the present century, Hume was the great bogey-man, and the duty of all self-respecting philosophers was to refute him. In our own day things are different. Empiricism, despite many obituary notices, is very much alive again. And this time it is in close alliance with Natural Science, and has equipped itself with all the technique of modern Symbolic Logic; it is more vigorous in construction and more formidable in criticism than it has ever been before. Consequently Hume is no longer the bogey-man. People now read the Treatise not as an awful warning, but as a source of stimulus and illumination. Incidentally, we can now enjoy his admirable style without any qualms. It is no longer thought that if a philosopher writes in clear and entertaining English, what he writes must therefore be either superficial or false. We regard obscurity and turgidity as demerits, not as signs of profound thinking. Moreover, we have learned to appreciate the eighteenth century, of which Hume was one of the most characteristic products. (shrink)

In Germany the claim is sometimes made that National Socialism incorporates the best of Plato’s political theory. In this country, too, Bertrand Russell and Mr. R. H. Crossman have emphasized, but with a different intention, the fascist elements in Plato's thought. It has to be admitted that whereas it would be merely laughable to claim that Jesus or Kant were exponents of the fascist philosophy, there is no such glaring incongruity with regard to Plato. It may be of some interest, (...) therefore, to examine anew the alleged likeness between the basic principles of fascism and the thought of Plato. No one would deny a strong likeness between some details of Plato’s. (shrink)

يتناول محمد حيان السمّان في كتابه في "تدبير القداسة: الحجابة والحجاب - أدب الدخول على السلطان في التراث العربي الإسلامي"، الصادر عن المركز العربي للأبحاث ودراسة السياسات، العلاقة بين السلطة السياسية والمجتمع في السياق العربي - الإسلامي، من خلال موضوع الحجابة والسلطان المحتجِب عن رعيته، والوقائع المتصلة بالقدوم على أصحاب السلطة من خلفاء وملوك وسلاطين ووزراء وغيرهم، وانتظار الإذن بلقائهم. يتألف الكتاب (407 صفحات بالقطع الوسط، موثقًا ومفهرسًا) من مدخل، وقسمين فيهما عشرة فصول. في المدخل، تأسيس وإضاءة، يعالج المؤلف مسألة (...) الحجابة والحاجب من حيث اللغة والاصطلاح، ومسألة الحجابة عند ابن خلدون من منطلق الحضارة الداعية إلى انتحال الألقاب وتمييزها، ومسألة الاستئذان الشرعي والحجابة والفرق بينهما. (shrink)

Studying Mesilat Yesharim with Hadar Goldin.

Trataremos de acercarnos a la concepción clásico-cristiana de oíkois y téine a partir del planteo actual de la relación, tan problemática, de técnica y medio ambiente. Marcharemos, por tanto, en pos de la noción clásica, no sólo como quien busca en la antigüedad un par de términos epónimos, sino con la aspiración de hallar las formas modélicas que puedan inspirar la solución de una aguda crisis cultural. Esta crisis se caracteriza por la crispada relación establecida, en el mundo moderno, entre (...) el desarrollo tecnológico y el ámbito vital del hombre, su entorno, su "casa". Ante todo, es necesario observar que la técnica moderna no representa simplemente el último estadio de la téjne, como continuidad, en extensión e intensidad, del milenario esfuerzo del hombre por dominar a la naturaleza mediante el empleo de habilidades artesanales. Hay en la técnica moderna algo de absolutamente peculiar, de cualitativamente diverso. Debemos subrayar, por tanto, para alcanzar su plena comprensión, el calificativo de moderna: la téjne ha cambiado de sentido. No se trata ya de un fenómeno más de nuestro mundo, sino que ahora el mundo moderno puede ser calificado como mundo técnico; técnica es también la cultura propia de la modernidad. (shrink)