Living-donor kidney transplantation is the “gold standard” treatment for many individuals with end-stage renal failure. Superior outcomes for the graft and the transplant recipient have prompted the implementation of new strategies promoting living-donor kidney transplantation, and the number of such transplants has increased considerably over recent years. Living donors are undoubtedly exposed to risk. In his editorial “underestimating the risk in living kidney donation”, Walter Glannon suggests that more data on long-term outcomes for living donors are needed to determine whether (...) this risk is permissible and the extent to which physicians and transplant surgeons should promote living-donor kidney transplantation.1 In this paper I argue that it is not clear that medical professionals have underestimated this risk, nor is it clear that more data on long-term outcomes are needed in order to determine whether it is permissible for individual autonomous agents to expose themselves to this or, indeed, any risk. The global shortage of organs available for transplantation ultimately means that every year thousands of individuals who value their life die needlessly. This is an unacceptable loss of human life. Saving life is one of the most wonderful things an individual can do for another. Promoting any strategy that will assist in saving life and preventing human suffering within acceptable moral limits is legitimate. (shrink)

Despite hundreds of definitions, no consensus exists on a definition of life or on the closely related and problematic definitions of the organism and death. These problems retard practical and theoretical development in, for example, exobiology, artificial life, biology and evolution. This paper suggests improving this situation by basing definitions on a theory of a generalized particle hierarchy. This theory uses the common denominator of the “operator” for a unified ranking of both particles and organisms, from elementary particles to animals (...) with brains. Accordingly, this ranking is called “the operator hierarchy”. This hierarchy allows life to be defined as: matter with the configuration of an operator, and that possesses a complexity equal to, or even higher than the cellular operator. Living is then synonymous with the dynamics of such operators and the word organism refers to a select group of operators that fit the definition of life. The minimum condition defining an organism is its existence as an operator, construction thus being more essential than metabolism, growth or reproduction. In the operator hierarchy, every organism is associated with a specific closure, for example, the nucleus in eukaryotes. This allows death to be defined as: the state in which an organism has lost its closure following irreversible deterioration of its organization. The generality of the operator hierarchy also offers a context to discuss “life as we do not know it”. The paper ends with testing the definition’s practical value with a range of examples. (shrink)

C. A. J. Coady; VIII*—Descartes' Other Myth, Proceedings of the Aristotelian Society, Volume 83, Issue 1, 1 June 1983, Pages 121–142, https://doi.org/10.1093/ar.

"The philosophical works of A. J. Ayer": p. [334]-341. Bibliography: p. [343]-346. Includes indexes.