In this paper a formalized logic of propositions, PA1, is presented. It is proven consistent and its relationships to traditional logic, to PM ([15]), to subjunctive (including contrary-to-fact) implication and to the “paradoxes” of material and strict implication are developed. Apart from any intrinsic merit it possesses, its chief significance lies in demonstrating the feasibility of a general logic containing theprinciple of subjunctive contrariety, i.e., the principle that ‘Ifpwere true thenqwould be true’ and ‘Ifpwere true thenqwould be false’ are incompatible.

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One area in which the moral philosopher might say something useful for the thinking of economists is that of welfare economics – not by improving formalizations or criticizing proofs as to conditions necessary or sufficient for an optimum situation, much less by suggesting what particular state of society would be optimal. Rather, he can do this by pointing out some distinctions, by suggesting how some terms used by economists can profitably be defined, and by questioning some assumptions which seem to (...) lie behind the thinking of some economists. The following discussion is aimed along these lines. The main goal of the argument will be to produce helpful definitions of “increase the welfare of an individual” and “increase social welfare.”. (shrink)

Herein we examine the theory and practical limits of designing a voluntary incentive scheme to protect endangered species on private land. We consider both an ay-ante scheme, in which a contract to the landholder depends only on what the landholder reports, and an ay-post scheme, in which a contract to the landholder depends on reports from all landowners. Except in special cases, the ex-ante scheme never implements the full information allocation, and can actually set aside too much land. In contrast, (...) expected habitat size under the ex-post scheme is smaller than both the ex-ante and full information allocations. (C) 2001 Elsevier Science (USA). (shrink)

Humans are an exceptionally cooperative species, but there is substantial variation in the extent of cooperation across societies. Understanding the sources of this variability may provide insights about the forces that sustain cooperation. We examined the ontogeny of prosocial behavior by studying 326 children 3–14 y of age and 120 adults from six societies (age distributions varied across societies). These six societies span a wide range of extant human variation in culture, geography, and subsistence strategies, including foragers, herders, horticulturalists, and (...) urban dwellers across the Americas, Oceania, and Africa. When delivering benefits to others was personally costly, rates of prosocial behavior dropped across all six societies as children approached middle childhood and then rates of prosociality diverged as children tracked toward the behavior of adults in their own societies. When prosocial acts did not require personal sacrifice, prosocial responses increased steadily as children matured with little variation in behavior across societies. Our results are consistent with theories emphasizing the importance of acquired cultural norms in shaping costly forms of cooperation and creating cross-cultural diversity. (shrink)

In their 2008 paper, Persson and Savulescu suggest that for moral bioenhancement (MBE) to be effective at eliminating the danger of ‘ultimate harm’ the intervention would need to be compulsory. This is because those most in need of MBE would be least likely to undergo the intervention voluntarily. By drawing on concepts and theories from epidemiology, this paper will suggest that MBE may not need to be universal and compulsory to be effective at significantly improving the collective moral standing of (...) a human populace and reducing the threat of ultimate harm. It will identify similarities between the mechanisms that allow biological contagions (such as a virus) and behaviours (such as those concerned with ethical and unethical actions) to develop, spread, and be reinforced within a population. It will then go onto suggest that, just as with the epidemiological principle of herd immunity, if enough people underwent MBE to reach a minimum threshold then the incidence and spread of immoral behaviours could be significantly reduced, even in those who have not received MBE. (shrink)

To controlforceaccurately under a wide range of behavioral conditions, the central nervous system would either require a detailed, continuously updated representation of the state of each muscle (and the load against which each is acting) or else force feedback with sufficient gain to cope with variations in the properties of the muscles and loads. The evidence for force feedback with adequate gain or for an appropriate central representation is not sufficient to conclude that force is the major controlled variable in (...) normal limb movements.Morton's hypothesis, thatlengthis controlled by a follow-up servo, has a number of difficulties related to the delays, gains, variability, and specificity in feedback pathways comprising potential servo loops. However, experimental evidence is consistent with these pathways providing servo assistance for some movements produced by coactivation of α- and static γ-motoneurons. Dynamic γ-motoneurons may provide an additional input for adaptive control of different types of movements.The idea that feedback is used to compensate for changes in musclestiffnesshas received experimental support under static postural conditions. However, reflexes tend to increase rather than decrease the range of variation in muscle stiffness during some cyclic movements. Theoretical problems associated with the regulation of stiffness are also discussed. The possibilities of separate control systems forvelocityorviscosityare considered, but the evidence is either negative or lacking. I conclude that different physical variables can be controlled depending on the type of limb movement required. The concept of stiffness regulation is also useful under some conditions, but should probably be extended to the regulation of the visco-elastic properties (i.e., the mechanical impedance) of a muscle or joint. (shrink)

E.R. Dodds’ 1959 edition of Plato’s Gorgias is a conventional treatment of this dialogue, aimed at audiences interested in close study of the text. Dodds himself regretted this outcome. He felt he had lost sight of an earlier goal, formulated at a time of political turmoil on the eve of WorldWar II, of using the Gorgias to bring out ‘both the resemblance and the difference between Plato’s situation and that of the intellectual today’. The present paper attempts to reconstruct that (...) goal, as it survives residually in his edition, surfaces in his The Greeks and the Irrational, and appears in some writings from the 1930s, particularly in unpublished lectures. Dodds did frequently juxtapose ancient and modern conceptions of the intellectual, and in a way that cast Plato in a positive light, as someone politically engaged and self-critical, and acutely sensitive, as Dodds himself was, to the political implications of social psychology. (shrink)

This study examines whether scenic beauty judgments based upon photographs of landscapes are similar to scenic beauty judgments based upon on-site experiences of landscapes. Two concerns are emphasized: a concern about the threat to the ecological validity of photo-based assessments caused by differences between on-site and photo-based contexts and a concern that the individual rater, rather than the group average, is the more appropriate unit of analysis for tests of validity of photo-based assessments. On-site scenic beauty assessments were collected from (...) day hikers. These data were compared to photo-based scenic beauty assessments collected from the same persons three months and nine months after their on-site experience. Approximately 38% of participants had insignificant correlations between their on-site and photo-based scenic beauty ratings. These and other results suggest that the validity of photo-based scenic beauty assessments is in doubt, at least for the situation studied here. Moreover, the results suggest that the difference between persons' on-site and photo-based ratings can be explained, in part, by contextual factors such as the mood, meaning, and novelty that differentiate photo-based from on-site landscape experiences. Group averaged on-site and photo-based assessments, however, were very similar, suggesting caution may be in order for studies interpreting summary measures. (shrink)

In the fourteenth century William of Occam in the course of his attack on the medieval scholastic philosophy enunciated his famous “razor”: Entia non sunt multiplicanda praeter necessitatem. This is the classic claim for the description of nature in terms of the minimum possible number of fundamental concepts. It was presumably so recognized by Newton in the third book of his “Principia” in 1687 when he wrote: “We are to admit no more causes of natural things than such as are (...) both true and sufficient to explain their appearances. To this purpose the philosophers say that Nature does nothing in vain, and more is in vain when less will serve; for Nature is pleased with simplicity and affects not the pomp of superfluous causes.”. (shrink)

Studies in the psychology and phenomenology of religious experience have long acknowledged similarities with various forms of psychopathology. Consequently, it has been important for religious practitioners and mental health professionals to establish criteria by which religious, spiritual, or mystical experiences can be differentiated from psychopathological experiences. Many previous attempts at differential diagnosis have been based on limited textual accounts of mystical experience or on outdated theoretical studies of mysticism. In contrast, this study presents qualitative data from contemporary Buddhist meditation practitioners (...) and teachers to identify salient features that can be used to guide differential diagnosis. The use of certain existing criteria is complicated by Buddhist worldviews that some difficult or distressing experiences may be expected as a part of progress on the contemplative path. This paper argues that it is important to expand the framework for assessment in both scholarly and clinical contexts to include not only criteria for determining normative fit with religious experience or with psychopathology, but also for determining need for intervention, whether religious or clinical. Qualitative data from Buddhist communities shows that there is a wider range of experiences that are evaluated as potentially warranting intervention than has previously been discussed. Decision making around these experiences often takes into account contextual factors when determining appraisals or need for intervention. This is in line with person-centered approaches in mental health care that emphasize the importance of considering the interpersonal and cultural dynamics that inevitably constitute the context in which experiences are evaluated and rendered meaningful. (shrink)

The idea that bureaucracy is a «rational» and «depoliticized» instrument in the conduct of public affairs, has recently come under severe criticism. Assuming the inevitable trend towards «politicization», modern bureaucracies can possibly be classified info four different categories, i.e. : «De-politicized», «Semi-politicized», «Committed» and «Fully-politicized». Such a classification is based on the operationalization of certain indices on four different dimensions viz. a) Degree of Bureaucracy's Influence in Decision-making; b) Degree of its Involvement in Political Activities; c) Degree of Political Interference (...) in its Work and d) its Image in the Public. The extent of «politicization» of any bureaucratic system and its actual deviation from the defined categories will, however, depend upon the available pattern of the characteristic indices in that particular society. Notwithstanding certain difficulties in the operationalization of such indices, the model should be helpful in providing a framework for a comparative analysis and measurement of «politicization» of bureaucracies in different political systems. (shrink)

K.J. Devlin has extended Jensen's construction of a model ofZFC andCH without Souslin trees to a model without Kurepa trees either. We modify the construction again to obtain a model with these properties, but in addition, without Kurepa trees inccc-generic extensions. We use a partially defined ◊-sequence, given by a fine structure lemma. We also show that the usual collapse ofκ Mahlo toω 2 will give a model without Kurepa trees not only in the model itself, but also inccc-extensions.

This book addresses the logical aspects of the foundations of scientific theories. Even though the relevance of formal methods in the study of scientific theories is now widely recognized and regaining prominence, the issues covered here are still not generally discussed in philosophy of science. The authors focus mainly on the role played by the underlying formal apparatuses employed in the construction of the models of scientific theories, relating the discussion with the so-called semantic approach to scientific theories. The book (...) describes the role played by this metamathematical framework in three main aspects: considerations of formal languages employed to axiomatize scientific theories, the role of the axiomatic method itself, and the way set-theoretical structures, which play the role of the models of theories, are developed. The authors also discuss the differences and philosophical relevance of the two basic ways of aximoatizing a scientific theory, namely Patrick Suppes’ set theoretical predicates and the "da Costa and Chuaqui" approach. This book engages with important discussions of the nature of scientific theories and will be a useful resource for researchers and upper-level students working in philosophy of science. (shrink)

It is the aim of this paper to examine certain aspects of a point of view which has attracted much attention in physical methodology. This is the standpoint known as operationalism. We wish to discuss its significance in the construction and interpretation of physical theories.The essential meaning of operationalism in physics is that physical concepts should be defined in terms of actual physical operations. On this view there is no meaning to a concept unless it represents an operation which can (...) be performed in the laboratory. Thus the term “pressure of a gas” signifies nothing until an operation is described which constitutes the measurement of pressure. When one thinks of pressure one must think. of some actual apparatus, such as, for example, some glass and rubber tubing and some mercury and certain operations performed using these until finally one gets a pointer reading which one calls the pressure of the gas. The same stand is taken with respect to length, time, velocity, acceleration, temperature, etc. (shrink)

Anyone, today, with even a slight interest in the methodology of science will be aware of the heated debate which has raged in regard to the thesis of the logical symmetry between explanation and prediction, which is entailed by the hypotheticodeductive account of scientific theory. The symmetry thesis, which received its classical exposition in a well-known article by Hempel and Oppenheim [2], has been subject to a steadily growing criticism by several eminent thinkers. My intention, in this article, is to (...) argue that the current reaction to the Hempel-Oppenheim position, as exemplified by Professors Hanson, Scriven, et al., represents a retrograde movement in the philosophy of science, which, as the number of its converts grows, could undermine the progress, which has been accomplished in the broad tradition that extends from Mach and Poincaré through the Vienna Circle to the present day. Specifically, it is my contention that the aforementioned reaction is symptomatic of a contemporary trend in the direction of irrationalism which, of all branches of philosophy, the philosophy of science should seek to dispel rather than to foster. For the sake of brevity, I propose to focus my remarks wholly on the original widely read article of Hanson on this subject [1]. That I single out this particular source should not be taken to belie the admiration I hold for the masterful scholarship of its author. (shrink)

Changes being introduced to deregulate the Dutch health care system after decades of extensive state control are to be welcomed, and will in future require consumers to be ‘well‐informed, cost‐conscious and assertive patients, who are aware of their responsibility for their own health.’ R.B. Kool MD, PhD and E.J.J.M. Kimman PhD are attached to the Department of Business Ethics in the Faculty of Economics and Econometrics at The Free University, P.O. Box 7161, 10107 MC Amsterdam.

Retaliation against whistleblowers is a well-recognized problem, yet there is little explanation for why uninvolved peers choose to retaliate through ostracism. We conduct two experiments in which participants take the role of a peer third-party observer of theft and subsequent whistleblowing. We manipulate injunctive norms and descriptive norms. Both experiments support the core of our theoretical model, based on social intuitionist theory, such that moral judgments of the acts of wrongdoing and whistleblowing influence the perceived likeability of each actor and (...) ultimately influence intention to ostracize each actor and indicate more willingness to ostracize the whistleblower than the wrongdoer. When we vary norms for the wrongdoing in Experiment 1, we find that descriptive and injunctive norms indirectly influence intentions to ostracize both the wrongdoer and whistleblower. These relationships are serially mediated by the observers’ moral judgments of the act and likeability of the actor. When we vary norms for whistleblowing in Experiment 2, the injunctive norm manipulation affected moral judgment of the action of whistleblowing, and we do not observe any other significant effects of the norm manipulations on moral judgments of the actions of wrongdoing or whistleblowing. (shrink)

In order to explain the idea that sacrifice involves voluntary diminution of the agent’s well-being, “well-being” must be explained. The thesis that an agent’s well-being just consists in the occurrence of events wanted is rejected. Overvold replaces it by the view that the motivating desires involve the existence of the agent, alive, at the time of their satisfaction. This view seems counterintuitive. The whole desire-satisfaction theory is to be rejected partly because we dont’t think an event worthwile if it is (...) not liked when it occurs, and partly because the theory cannot give a sensible account of what is good for an individual when his desires change. A more satisfactory view is that the goodness of an event for a person is fixed by his total gratifications as a result of its occurrence, provided they would occur if the person were fully informed about facts knowledge of which would change them if it existed. But self-sacrifice seems to involve not only voluntary diminution of well-being in this sense, but belief that the action is taken for the benefit of someone else. Overvold’s view leaves open the possibility that acting morally is never contrary to self-interest, if one of the agent’s major interests is that he act morally. This is an ingenious suggestion, but seems a bit counterintuitive. (shrink)