The use of tensed language and the metaphor of set ‘formation’ found in informal descriptions of the iterative conception of set are seldom taken at all seriously. Both are eliminated in the nonmodal stage theories that formalise this account. To avoid the paradoxes, such accounts deny the Maximality thesis, the compelling thesis that any sets can form a set. This paper seeks to save the Maximality thesis by taking the tense more seriously than has been customary (although not literally). A (...) modal stage theory, MST, is developed in a bimodal language, governed by a tenselike logic. Such a language permits a very natural axiomatisation of the iterative conception, which upholds the Maximality thesis. It is argued that the modal approach is consonant with mathematical practice and a plausible metaphysics of sets and shown that MST interprets a natural extension of Zermelo set theory less the axiom of Infinity and, when extended with a further axiom concerning the extent of the hierarchy, interprets Zermelo–Fraenkel set theory. (shrink)

Neologicists have sought to ground mathematical knowledge in abstraction. One especially obstinate problem for this account is the bad company problem. The leading neologicist strategy for resolving this problem is to attempt to sift the good abstraction principles from the bad. This response faces a dilemma: the system of ‘good’ abstraction principles either falls foul of the Scylla of inconsistency or the Charybdis of being unable to recover a modest portion of Zermelo–Fraenkel set theory with its intended generality. This article (...) argues that the bad company problem is due to the ‘static’ character of abstraction on the neologicist's account and develops a ‘dynamic’ account of abstraction that avoids both horns of the dilemma. 1 Introduction2ion Reconstructed3 From Bad to Worse4 Abstraction Reconceived5 Bad Company Made GoodA AppendixA.1SemanticsA.2LogicA.3ConsistencyA.4Strength. (shrink)

Objectives: To determine the effects of risk and payment on subjects’ willingness to participate, and to examine how payment influences subjects’ potential behaviours and risk evaluations.Methods: A 3 × 3 , between subjects, completely randomised factorial design was used. Students enrolled at one of five US pharmacy schools read a recruitment notice and informed consent form for a hypothetical study, and completed a questionnaire. Risk level was manipulated using recruitment notices and informed consent documents from hypothetical biomedical research projects. Payment (...) levels were determined using the payment models evaluated by Dickert and Grady as a guide. Five dependent variables were assessed in the questionnaire: willingness to participate, willingness to participate with no payment, propensity to neglect to tell about restricted activities, propensity to neglect to tell about negative effects, and risk rating.Results: Monetary payment had positive effects on respondents’ willingness to participate in research, regardless of the level of risk. However, higher monetary payments did not appear to blind respondents to the risks of a study. Payment had some influence on respondents’ potential behaviours regarding concealing information about restricted activities. However, payment did not appear to have a significant effect on respondents’ propensity to neglect to tell researchers about negative effects.Conclusions: Monetary payments appear to do what they are intended to do: make subjects more willing to participate in research. Concerns about payments blinding subjects to risks could not be substantiated in the present study. However, the findings do raise other concerns—notably the potential for payments to diminish the integrity of a study’s findings. Future research is critical to make sound decisions about the payment of research subjects. (shrink)

Background: Ethics consultation is used regularly by some doctors, whereas others are reluctant to use these services.Aim: To determine factors that may influence doctors to request or not request ethics consultation.Methods: A survey questionnaire was distributed to doctors on staff at the University Community Hospital in Tampa, Florida, USA. The responses to the questions on the survey were arranged in a Likert Scale, from strongly disagree, somewhat disagree, neither agree nor disagree, somewhat agree to strongly agree. Data were analysed with (...) the Wilcoxon test for group comparisons, the χ2 test to compare proportions and a logistic regression analysis.Results: Of the 186 surveys distributed, 121 were returned, giving a 65% response rate. Demographic data were similar between the groups saying yes and no . No statistically significant differences were observed between the user and non-user groups in terms of opinions about ethics consultants having extensive training in ethics or participating in ethics educational opportunities. On the issue “Ethics committee members or consultants cannot grasp the full picture from the outside”, the non-users were neutral, whereas the users somewhat disagreed . Even more significant was the difference between surgeons and non-surgeons, where, by logistic regression analysis, surgeons who believed that ethics consultants could not grasp the full picture from the outside were highly likely to not use . Non-users of ethics consultations thought that it was their responsibility to resolve issues with the patient or family . Users of ethics consultation believed in shared decision making or the importance of alternate points of view .Implications: Ethics consultations are used by doctors who believe in shared decision making. Doctors who did not use ethics consultation tended to think that it was their responsibility to resolve issues with patients and families and that they were already proficient in ethics. (shrink)

The ‘decapitation gambit’ holds that, if physical decapitation normally entails the death of the human being, then physiological decapitation, evident in cases of total brain failure, entails the death of the human being. This argument has been challenged by Franklin Miller and Robert Truog, who argue that physical decapitation does not necessarily entail the death of human beings and that therefore, by analogy, artificially sustained human bodies with total brain failure are living human beings. They thus challenge the current neurological (...) criterion for determining death and argue for a return to the traditional criterion of the irreversible loss of circulation and respiration. In this paper, I defend the decapitation gambit and total brain failure as a criterion for determining death against Miller and Truog's criticism. (shrink)

Albert and De Ruiter provide an introduction to the Conversation Analytic approach to ‘repair’: the ways in which people detect and deal with troubles in speaking, hearing and understanding in conversation. They explain the basic turn‐taking structures involved, provide examples, explain recent developments in the field and highlight some important points of contact and contrast with work in the Cognitive Sciences.

'Johann Sommerville's is an impeccable textbook. Simply written, it provides exposition of Hobbes' arguments in the context of English and continental thought'. P. Springborg, University of Sydney, Political Studies, Vol. XL1, No 2 6/93 Thomas Hobbes was probably the greatest of British political theorists. Too often commentators have failed to grasp his meaning because they have ignored the historical context in which he wrote. Drawing on much recent scholarship and on many little-known seventeenth century sources, this book presents a lucid (...) and jargon-free examination of Hobbes' arguments, setting them against a background of the ideas of his contemporaries and of the political events of his lifetime. By viewing Hobbes in his context, the book both clarifies his theories and illuminates European thinking at a critical stage in the development of modern political ideas. (shrink)

Moral conflicts occur in theories that involve more than one principle. I examine basic ways of dealing with moral dilemmas in medical ethics and in ethics generally, and propose a different approach based on a principle I call the "mutuality principle". It is offered as an addition to Tom Beauchamp and James Childress' principlism. The principle calls for the mutual enhancement of basic moral values. After explaining the principle and its strengths, I test it by way of an examination of (...) three responses—in the recent Festschrift for Dr Raanon Gillon—to a case involving parental refusal of a blood transfusion. The strongest response is the one that comes closest to the requirements of the mutuality principle but yet falls short. I argue that the mutuality principle provides an explicit future orientation in principlism and gives it greater moral coherence. (shrink)

We propose a mathematical model for a class of predator–prey systems more complex than the usual one, involving a commensalism effect consisting in an influence of the predator on the sustainability of the prey. This effect induces interesting new features, including bi-stability. The question of the possibility of reaching a certain attractor starting from initial conditions with a small population of predators, which presents an interest from the vewpoint of the onset of the predator in evolution, is addressed. We propose (...) two possibilities: the classical one involving adapted conditions in the far past and a new one using biodiversity, specifically the presence of another predator which operates as a starter, being displaced in the sequel. (shrink)

Human conflict and its resolution is obviously a subject of great practical importance. Equally obviously, it is a vast subject, ranging from total war at one end of the spectrum to negotiated settlement at its other end. The literature on the subject is correspondingly vast and, in recent times, technical, thanks to the valuable contributions made to it by game theorists, economists, and writers on industrial and international relations. In this essay, however, I shall discuss only one familiar form of (...) conflict-resolution. There is room for such a discussion, because philosophers have lately neglected compromise, despite the interest shown in it by the aforementioned experts, and despite the classic treatments of it by Halifax, Burke and Morley. Truly, ‘…compromise is not so widely discussed by philosophers as one might expect’, and ‘…the idea of compromise has been largely neglected by Anglo-American jurisprudence’. (shrink)

One of the most important features of living beings that seems universal is perhaps their ability to be modified in a functional way.In order to modelize this characteristic, we designed automata with a finite number of instantaneous internal descriptions, with input(s) and output(s) and which are able to be functionally modified.

Transcranial Magnetic Stimulation is a technique that may aid researchers in their attempts to elucidate the underlying brain functions involved in consciousness. By employing TMS along with other neuroimaging methods and case studies, researchers may be aided in addressing their various hypotheses. Employing the ‘brain as mobile’ analogy, it may be possible to determine the individual contributions of single elements of the brain without upsetting the overall balance.

Death cannot be mastered through a metaphysics of efficiency that interprets all actions in terms only of cause and effect, but it can be transcended if we leave the frame open to death’s ambiguityIn the second of this two part series, I describe how in shifting our frames from one of human purpose and meaning to one of efficiency, we shift the possible answers we get to our questions about voluntary active euthanasia and physician assisted suicide . Thus, by placing (...) VAE/PAS within the frame of efficiency, we narrow our focus to the final effect in the world of cause and effect—namely death. Thus, in ensconcing euthanasia within a legal framework meant to instrumentally and efficiently control euthanasia, we are in fact narrowing our focus on death. Thus, in legalising VAE/PAS we are not just adding one choice to a panoply of other choices, we are in fact changing the nature of all choices, for each choice conditions all others. We should therefore live with the lie that VAE/PAS do not happen as opposed to living with the lie that through efficient legal control we protect patients from medical dominance.AN ANECDOTESeveral years ago an acquaintance told me about a terrible situation in which he found himself during the Vietnam war. He was Green Beret—one of the elite special forces corps of the US army. He was in an area that was officially off limits to the US. His unit came under heavy fire and a buddy was shot in several places but was still alive. His comrade was in serious pain, but what scared him the most was that he might die in the jungle, be eaten by a wild animal, or be captured by the enemy. There was no way to get him out. The wounded soldier …. (shrink)

Dubourg and Baumard's paper takes a different, and fruitful, approach to the study of imaginary worlds than what is usually found in Media Studies, but omits certain circumstances and influences that shaped their history; this article argues that psychological or behavioral factors are not enough to explain the growth of imaginary worlds, even as they may be important influences.

This volume focuses on the modeling of cognition, and brings together contributions from psychologists and researchers in the field of cognitive science.