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)

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.

This paper considers three modern objections to Anselm’s argument on atonement in book I of ’Cur Deus Homo’. The objections are from Friedrich Nietzsche, R. C. Moberly, and Hastings Rashdall; each one makes the case that Anselm’s argument is fallacious. Each one interprets Anselm’s position as requiring that someone innocent suffer punishment in order to acquit guilt. I contend that these objectors do not offer a strong case against Anselm’s argument, principally because they have not examined it completely and (...) have misunderstood his reasoning. In fine, Anselm’s case is (a) the Son’s obedience to the Father suffices for atonement, (b) the Son is an advocate for Adam and his heirs and stands in for them because of his blood ties to humanity, and (c) the Son is the advocate for the Father in the latter’s attempt to end human estrangement from justice. Being both an advocate of the Father and an heir to Adam, the Son’s Incarnation itself prepares the way of reconciliation and the life of. (shrink)

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It is a common complaint against moral philosophers that their abstract theorising bears little relation to the practical problems of everyday life. Professor Braithwaite believes that this criticism need not be inevitable. With the help of the Theory of Games he shows how arbitration is possible between two neighbours, a jazz trumpeter and a classical pianist, whose performances are a source of mutual discord. The solution of the problem in the lecture is geometrical, and is based on the formal analogy (...) between the logic of the situation and the geometry of a parabola. But an appendix provides the alternative algebraic treatment of a general two-person collaboration situation. (shrink)

The question of whether or not children may be used as subjects in non-therapeutic research projects has generated a great deal of debate and received answers varying from 'no, never' to 'yes, if societal interests are served'. It has been claimed that a Kantian, deontological ethics would necessarily rule out such research, since valid consent would be impossible. The present paper gives a deontological argument for allowing children to be subjects in certain types of research.

R.G. Collingwood defined historical knowledge as essentially ‘scientific’, and saw the historian's task as the ‘re-enactment of past thoughts’. The author argues the need to go beyond Collingwood, first by demonstrating the authenticity of available evidence, and secondly, using Namier as an example, by considering methodology as well as epistemology, and the need to relate past thoughts to their present context. The ‘law of the consumption of time’ encourages historians to focus on landmark events, theories and generalisations, thus breaking from (...) Collingwood's emphasis on fidelity to past ideas and interpreting the past from the concepts of the present. This conflict can only be reconciled by the study of historiography. (shrink)

Marcus Aurelius, Roman emperor from 161 to 180 A.D., is renowned for his just rule and long frontier wars. But his lasting fame rests on his Meditations, a bedside book of reflections and self-admonitions written during his last years, that provide unique insights into the mind of an ancient ruler and contain many passages of pungent epigram and poetic imagery. This study is designed to make the Meditations more accessible to the modern reader. Rutherford carefully explains the historical and philosophical (...) background, charts the main themes and tendencies of Marcus's thought, and relates stylistic detail to the intellectual and moral outlook of the author. His goal is to define Marcus's aims, attitudes, and styles more precisely and restore his work to the position it held in the past, that of a spiritual classic which can be read and enjoyed by people who are not professional scholars. (shrink)

Virtually all philosophers now agree that human beings - and possibly the higher animals - have moral rights in some sense, both special rights against individuals to whom they stand in a special relation, and general rights, against everybody or against the government, just in virtue of their human nature. Some philosophers also think, however, that anyone who is a utilitarian ought not to share this view: there is a fundamental incompatibility between utilitarinism and human rights. Most utilitarians, of course, (...) have not thought there is such an incompatibility. John Stuart Mill, for instance, espoused utilitarianism at the same time that he defended rights to free speech and freedom of action except where it injures others. In what follows I wish to explore some reasons recently put forward to show that the utilitarian who wishes to affirm that there are moral rights faces a serious logical problem; and I shall argue that further analysis shows the alleged difficulty is unreal. (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)

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)

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)

Many social scientists and philosophers have counted themselves moral relativists in some sense or other. We cannot deal with all the various views which are properly called forms of “moral relativism”; so I propose to explain a form of moral relativism which seems to me an interesting, and somewhat plausible theory. This theory comprises the following three affirmations: The basic moral principles of different individuals or groups sometimes are, or can be, in some important sense conflicting. When there is such (...) fundamental conflict of basic principles or standards, there is either always, or at least sometimes, no way to show that one view is better justified even in the presence of ideally complete factual information; in that sense the principles are equally justified or “valid.” But there is a sense in which a particular moral belief may be mistaken or unjustified, if it is a misapplication of the basic principles of the individual or group, e.g., if the basic principles plus statements of known or knowable facts entail a moral proposition incompatible with it. As stated, moral relativism could be true even though in fact, accidentally, all individuals agree in their basic moral principles. (shrink)

The concept of energy, the premier concept of physics and indeed of all science, is here investigated from the standpoint of its early historical origin and the philosophical implications thereof. The fundamental assumption is made that the root of the concept is the notion of invariance or constancy in the midst of change. Salient points in the development of this idea are presented from ancient times up to the publication of Lagrange'sMécanique Analytique (1788).

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.

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.