I note that the logics of the relevant group most closely tied to the research programme in paraconsistency are those without the contraction postulate(A.AB).AB and its close relatives. As a move towards gaining control of the contraction-free systems I show that they are prime (that wheneverA B is a theorem so is eitherA orB). The proof is an extension of the metavaluational techniques standardly used for analogous results about intuitionist logic or the relevant positive logics.

This three-volume work constitutes a comprehensive scholarly edition of the correspondence of the English economist, Alfred Marshall, one of the leading figures in the development of economics and the founder of the Cambridge School of Economics. The edition fills a long-standing gap in the history of economic thought with hitherto unpublished material. Students will find it a basic resource for understanding the development of economics and other social sciences in the period since 1870. In particular, it provides much new information (...) about Marshall's views on economic, social and political issues, his struggles to promote the teaching of economics at the University of Cambridge, and his relations with colleagues in Cambridge and elsewhere. Marshall's letters are notable for their frankness and spontaneity. (shrink)

Patients sometimes request procedures their doctors find morally objectionable. Do doctors have a right of conscientious refusal? I argue that conscientious refusal is justified only if the doctor's refusal does not make the patient worse off than she would have been had she gone to another doctor in the first place. From this approach I derive conclusions about the duty to refer and facilitate transfer, whether doctors may provide 'moral counseling,' whether doctors are obligated to provide objectionable procedures when no (...) other doctor is available, why the moral consensus among doctors seems relevant even though it does not determine whether something is morally acceptable, and whether doctors should stay out of fields whose standard procedures they find morally unacceptable. (shrink)

It is shown that there are exactly six normal DeMorgan monoids generated by the identity element alone. The free DeMorgan monoid with no generators but the identity is characterised and shown to have exactly three thousand and eighty-eight elements. This result solves the "Ackerman constant problem" of describing the structure of sentential constants in the logic R.

Basic issues in the recent ‘death-of-God’ movement can be illuminated by comparison and contrast with the relevant ideas of two American philosophers, John Dewey and William James. Dewey is an earlier spokesman for ideas that are central to the ‘radical theology’ of Thomas J. J. Altizer, William Hamilton, and Paul Van Buren. His reasons for rejecting theism closely resemble propositions maintained by these ‘death-of-God’ theologians. James, on the other hand, points toward a theological alternative. He takes cognizance of ideas (...) similar to those in the ‘radical theology’, but he does not opt for either a metaphorical or real elimination of God. Thus, the contentions of this paper are that there has been a version of the ‘death-of-God’ perspective in American thought before, and that there are resources in the American tradition that suggest a viable option to this perspective. (shrink)

Sometimes the mentally ill have sufficient mental capacity to refuse treatment competently, and others have a moral duty to respect their refusal. However, those with episodic mental disorders may wish to precommit themselves to treatment, using Ulysses contracts known as “mental health advance directives.” How can health care providers justify enforcing such contracts over an agent’s current, competent refusal? I argue that providers respect an agent’s autonomy not retrospectively—by reference to his or her past wishes—and not merely synchronically—so that the (...) agent gets what he or she wants right now—but diachronically and prospectively, acting so that the agent can shape his or her circumstances as the agent wishes over time, for the agent will experience the consequences of providers’ actions over time. Mental health directives accomplish this, so they are a way of respecting the agent’s autonomy even when providers override the agent’s current competent refusal. (shrink)

We show that the weak monadic second order theory of the structure is first order interpretable in its automorphism group.

An examination of the ethical issues raised by the possibility of human life extension, including its desirability, unequal access, and the threat of overpopulation. -/- Life extension—slowing or halting human aging—is now being taken seriously by many scientists. Although no techniques to slow human aging yet exist, researchers have successfully slowed aging in yeast, mice, and fruit flies, and have determined that humans share aging-related genes with these species. In New Methuselahs, John Davis offers a philosophical discussion of the (...) ethical issues raised by the possibility of human life extension. Why consider these issues now, before human life extension is a reality? Davis points out that, even today, we are making policy and funding decisions about human life extension research that have ethical implications. With New Methuselahs, he provides a comprehensive guide to these issues, offering policy recommendations and a qualified defense of life extension. -/- After an overview of the ethics and science of life extension, Davis considers such issues as the desirability of extended life; whether refusing extended life is a form of suicide; the Malthusian threat of overpopulation; equal access to life extension; and life extension and the right against harm. In the end, Davis sides neither with those who argue that there are no moral objections to life enhancement nor with those who argue that the moral objections are so strong that we should never develop it. Davis argues that life extension is, on balance, a good thing and that we should fund life extension research aggressively, and he proposes a feasible and just policy for preventing an overpopulation crisis. (shrink)

This paper responds to John Milbank's essay, `The Poverty of Niebuhrianism' in The Word Made Strange, in which Milbank critiques Reinhold Niebuhr's Christian realism for reliance on Stoic natural law thinking and its deficiency in regard to original sin. While Milbank rightly detects naturalism in Christian realism, this naturalism is inaccurately identified as Stoic in conception. Additionally, more detailed analysis of Niebuhr's thought reveals similarities between Niebuhr and Milbank on original sin, as this article seeks to demonstrate.

Judith Thomson argues that a fetus may have a right to life yet lack the right to use its mother's body to stay alive. According to Kenneth Einar Himma, Thomson's argument applies only to cases where the parties meet two conditions. First, they must and, second, they must be Himma devises a case involving conjoined twins to show why the mother–fetus case does not meet these conditions.

ExcerptGather three readers of Telos together in a room to speak about a controversial issue, and you’re likely to hear six opinions, each one forcefully expressed. After all, the journal has made a point of addressing the social and political challenges of modernity by cultivating the intellectual resources of discrete, often overlooked communities and traditions. This has placed the clash of divergent viewpoints, or “intellectual diversity,” at the core of its identity. Want to hear an anarchist argue with a liberal (...) about a Catholic conservative’s reading of the implications of Carl Schmitt for the neo-Confucian view of culture, nationhood, and globalization? A Telos conference is the place for you. Welcome—sit for a while and have some coffee (it’s Italian). (shrink)

Posner & Raichle (1994) is a nice addition to the Scientific American Library and the average reader will both enjoy the book and learn a great deal. As an activeresearcher, however, I find the book disappointing in many respects. My two major disappointments are in the illusion of computation that is created throughout the volume and in the inadequate perspective of the presentation on visual attention.

The worst possible way to resolve this issue is to leave it up to individual choice. There is no known social good coming from the conquest of death (Bailey, 1999). - Daniel Callahan Dramatically extending the human lifespan seems increasingly possible. Many bioethicists object that life-extension will have Malthusian consequences as new Methuselahs accumulate, generation by generation. I argue for a Life-Years Response to the Malthusian Objection. If even a minority of each generation chooses life-extension, denying it to them deprives (...) them of many years of extra life, and their total extra life-years are likely to exceed the total life-years of a majority who do not want life-extension. This is a greater harm to those who want extended life than the Malthusian harms to those who refuse extended life, both because losing an extra year of life is worse than enduring a year of Malthusian conditions, and because the would-be Methuselahs have more life-years at stake. Therefore, even if life-extension seems likely to cause severe overcrowding and resource shortages, that threat is not sufficient to justify society in restricting the development or availability of life-extension. (shrink)

ABSTRACT Historicist approaches to the reading of sacred texts, rapidly attain a point where further research produces diminishing returns, resulting in more historical speculation rather than less. This is the opposite of the desired result. The cause of this impasse lies in a failure to discern the rhetorical techniques of the author as a basic reading strategy. Similarly, it is necessary to discern that the author has already made key determinations as to historicity. What is now required of the reader (...) is a deepened appreciation of the intentional theological, ontological and existential implications of the narrative. This paper examines how a literary/rhetorical approach may yield positive results in the case of the call of Nathanael, a narrative fragment that poses intriguing critical questions, both theological and Christological. The results suggest a dominical encounter that supplies the reader with pre-emptive eschatological intensity through deliberate juxtaposition of Nathanael’s disbelief and Jesus’ selfawareness held together in a matrix of scriptural fulfilment. (shrink)

The paper describes two practical exercises (and their learning outcomes) requiring students to consider certain concrete decisions made by managers in business and professional life. The first exercise requires students to consider that competitive economic exchange inevitably puts managers in situations where they cannot accurately predict the outcomes of their decisions, and often results in harm to innocent people. In this practical exercise, seven discussion situations are described and students are asked to make decisions that take into account the individuals (...) affected by these managerial decisions. Students are asked to consider various ethical theories and devise creative solutions so as to avoid unnecessary harm. The second exercise places students in roles that represent shareholders and stakeholders and asks them to consider the relocation of a manufacturing company to their community. (shrink)

It is interesting to see Aristotle's observation of natural law in order to renew the ideal of law against the Marxist theory of society, to renounce the normative theory of the nation, and to study the liberal theory of information. All this allows us to expect the realization of social justice and human rights from the institutionalization of markets and the precondition of the boundary of the general culture, namely the communitarian ethics and the moral reformation against the genealogist tradition. (...) We find in the tradition inaugurated by Aristotle the function of ethical discussion about the common good, thus imbricating the differences stratified by the economic evolution in the polis. (shrink)

This is the third of a three-volume work constituting a comprehensive, scholarly edition of the correspondence of the English economist, Alfred Marshall, one of the leading figures in the development of economics and the founder of the Cambridge School of Economics. The edition fills a long-standing gap in the history of economic thought with hitherto unpublished material. Students will find it a basic resource for understanding the development of economics and other social sciences in the period since 1870. In particular, (...) it provides much new information about Marshall's views on economic, social and political issues, his struggles to promote the teaching of economics at the University of Cambridge, and his relations with colleagues in Cambridge and elsewhere. Marshall's letters are notable for their frankness and spontaneity. (shrink)

The general problem of visual search can be shown to be computationally intractable in a formal, complexity-theoretic sense, yet visual search is extensively involved in everyday perception, and biological systems manage to perform it remarkably well. Complexity level analysis may resolve this contradiction. Visual search can be reshaped into tractability through approximations and by optimizing the resources devoted to visual processing. Architectural constraints can be derived using the minimum cost principle to rule out a large class of potential solutions. The (...) evidence speaks strongly against bottom-up approaches to vision. In particular, the constraints suggest an attentional mechanism that exploits knowledge of the specific problem being solved. This analysis of visual search performance in terms of attentional influences on visual information processing and complexity satisfaction allows a large body of neurophysiological and psychological evidence to be tied together. (shrink)