In the Laura Ashworth case in 2008, the Human Tissue Authority considered itself bound to overturn a deceased daughter's alleged wish that one of her kidneys should go to her mother, who at the time had end stage kidney failure and was on dialysis. 12 This was so even though Laura's earlier wish to be a living donor would most likely have been authorised, had the formal assessment process begun. The decision provoked much criticism. The recent Department of Health document (...) Requested Allocation of a Deceased Donor Organ, published 29 March 2010, developed by the UK health administrations together with the HTA and NHS Blood and Transplant , which is the main organ allocation body in the UK, seeks to resolve this ethical dilemma by setting out the circumstances in which requests for such deceased donations may be acceptable. 3 The most important conditions appear to be:a. the donation must be unconditional in nature;b. there must be …. (shrink)

In the modal literature various notions of completeness have been studied for normal modal logics. Four of these are defined here, viz. (plain) completeness, first-order completeness, canonicity and possession of the finite model property — and their connections are studied. Up to one important exception, all possible inclusion relations are either proved or disproved. Hopefully, this helps to establish some order in the jungle of concepts concerning modal logics. In the course of the exposition, the interesting properties of first-order definability (...) and preservation under ultrafilter extensions are introduced and studied as well. (shrink)

Transplantation research on samples and organs from deceased donors in England, Wales and Northern Ireland is under threat. The key problems relate to difficulties encountered in gaining consent for research projects, as distinct from consent to donation for clinical transplantation. They are due partly to the terms of the Human Tissue Act 2004 (the 2004 Act), and partly to its interpretation by the Human Tissue Authority (HTA). They include excessive interaction with donor representatives regarding ‘informed consent’ to research projects, uncertainty (...) as to the scope and duration of a donor's ‘authority’ over an organ, and restrictions caused by the apparent need for licensing of transplantation research under the 2004 Act, combined with lack of certainty, or guidance, as to the distinction between ‘research’, which requires a licence, and ‘service development’, which does not. In our view this confusion hinders and deters Specialist Nurses for Organ Donation in approaching donor representatives and discussing possible research projects with them. It has also, as we have reported elsewhere, led to abandonment of research projects for fear of liability, despite both Research Ethics Committee (REC) approval and donor consent. Such problems do not seem to occur under the transplant laws of most other comparable jurisdictions. The Transplantation Ethics Symposium, ‘The ethics of organ retrieval: goals, rights and responsibilities’, hosted by the MRC Centre for Transplantation at King's College London in December 2010, revealed that many senior clinicians and researchers, administrators, and lawyers are both unclear and in disagreement concerning the effects of the 2004 Act and the extent to which it is adhered to or ignored in practice. In this paper we examine the difficulties encountered and suggest solutions based on a less restrictive interpretation of the 2004 Act, or, more probably, a regulatory change under its authority. We propose that, in the long term, a law which includes consent for REC-approved research within the general consent for organ donation and transplantation seems preferable to the present system, both ethically and in practical terms. (shrink)

Different explanations of color vision favor different philosophical positions: Computational vision is more compatible with objectivism (the color is in the object), psychophysics and neurophysiology with subjectivism (the color is in the head). Comparative research suggests that an explanation of color must be both experientialist (unlike objectivism) and ecological (unlike subjectivism). Computational vision's emphasis on optimally prespecified features of the environment (i.e., distal properties, independent of the sensory-motor capacities of the animal) is unsatisfactory. Conceiving of visual perception instead as the (...) visual guidance of activity in an environment that is determined largely by that very activity suggests new directions for research. (shrink)

The statistical properties of a single quantum object and an ensemble of independent such objects are considered in detail for two-level systems. Computer simulations of dynamic zero-point quantum fluctuations for a single quantum object are reported and compared with analytic solutions for the ensemble case.

The author maintains that "man’s chief purpose in life consists in wanting to know the truth and to experience the real." But in the tradition of Kant and recent continental philosophy, he claims that one can know the real only as constituted by the mind, not as it is in itself. Rauche goes on to conclude, that all truths are perspectival and that the Truth can never be known—though it remains our highest aspiration. The perspectival character of truth is the (...) foundation upon which Rauche develops his position. He claims that truths, as perspectives, are in controversial relations to one another which state of affairs he calls a multiple of broken logos and which reveal a natural reference within the permanent state of crisis of human truth. Rauche puts it as follows: "... if man and his fellowman strive towards the Truth earnestly, they must accept each other’s truths as being complementary to each other." At this point men will become conscious of the fact that they are referred to one another. Thus the controversial relations of man’s truths are a permanent crisis which is the source both of individuality and of community. The experience of the permanent crisis of truths competing with one another is what Rauche means by "actuality." The positive acceptance of the permanent crisis of human truth is the empirical basis of the moral ought. Since human truths are complementary and refer to each other, it is "in their mutual willingness to respect each other’s claims and to see their existential needs and interests in the light of those of the other that [men] may be said to lead an ethical existence." The empirical ground of the moral ought is then seen to be the controversial relation existing between human truths. Rauche rejects in principle any attempt to constitute a theoretical ethics on a rationally conceived principle. Since the moral ought is grounded in the controversial relation existing between human truths, moral principles can be experienced only in our dealings with our fellow man, e.g., in the family and society—wherever the relationship of I-Thou is found. In effect, as in the case of truth, the moral ought appears in the field of actuality; and the crisis in truth is revealed as an ethical ground. The same permanent crisis which is the ground of truth and of the moral ought is regarded by Rauche as the basis of reality. Truth, moral existence, and reality are all conjoined in actuality. The permanent crisis of human truths is an empirical limit which has logical, epistemological, ethical and metaphysical significance. And, Rauche concludes, "... it becomes clear that man’s real existence can never be derived from a rationally conceived essence, but that essence is the way in which man realizes himself by projecting himself into his environment from the peculiar situation in which he happens to find himself, and which induces him to constitute the world in controversy with his fellowman." This is a tightly argued book and Rauche remains consistent with his assumptions throughout. One wishes, however, that the author would examine some of his assumptions. One looks in vain for a single argument which establishes that, e.g., the Truth which is unknowable and yet is the indispensable point to which men strive does in fact exist. If it does not, and Rauche has given us no reason to believe otherwise, then the basis of complementarity of conflicting human truths is lost.—J. J. F. (shrink)

Gabbay has gathered an enormous amount of results; some of them important and novel, others important but already known, many rather routine, however. The organization of this material shows grave defects, both in the exposition and in its logical structure. Intensional logic appears as a vast collection of (often duplicated) loosely connected results. This may be a true reflection of the present state of the subject, but it does not contribute to a better understanding of it, let alone advance it.