Stem cells are defined as having capacities for both self-renewal and differentiation. Many different entities satisfy this working definition. I show that this general stem cell concept is relative to a cell lineage, temporal duration, and characters of interest. Experiments specify values for these variables. So claims about stem cells must be understood in terms of experimental methods used to identify them. Furthermore, the stem cell concept imposes evidential constraints on interpretation of experimental results. From these constraints, it follows that (...) claims about stem cell capacities are inherently uncertain. This result has important implications for stem cell research. (shrink)

Since a couple of decades, the notion of a precautionary principle plays a central and increasingly influential role in international as well as national policy and regulation regarding the environment and the use of technology. Urging society to take action in the face of potential risks of human activities in these areas, the recent focus on climate change has further sharpened the importance of this idea. However, the idea of a precautionary principle has also been problematised and criticised by scientists, (...) scholars and policy activists, and been accused of almost every intellectual sin imaginable: unclarity, impracticality, arbitrariness and moral as well as political unsoundness. In that light, the very idea of precaution as an ideal for policy making rather comes out as a dead end. On the basis of these contrasting starting points, Christian Munthe undertakes an innovative, in-depth philosophical analysis of what the idea of a precautionary principle is and should be about. A novel theory of the ethics of imposing risks is developed and used as a foundation for defending the idea of precaution in environmental and technological policy making against its critics, while at the same time avoiding a number of identified flaws. The theory is shown to have far-reaching consequences for areas such as bio-, information- and nuclear technology, and global environmental policy in areas such as climate change. The author argues that, while the price we pay for precaution must not be too high, we have to be prepared to pay it in order to act ethically defensible. A number of practical suggestions for precautionary regulation and policy making are made on the basis of this, and some challenges to basic ethical theory as well as consumerist societies, the global political order and liberal democracy are identified. (shrink)

The precautionary principle (PP) has been criticised for almost every intellectual sin one may imagine: unclarity, impracticability, rigidity, implausibility etc. Recognising the rather obvious fact that there is no such thing as one PP, this paper attempts to address this criticism on a more constructive note than merely view it as forcing us to be "for or against" precaution. This is done by connecting an underlying ethical ideal regarding the imposition of risks present in most formulations of PP to the (...) criticism and use the latter for discussing how such an idea may be plausibly designed and used for underpinning policies that may plausibly be said to express the spirit of PP. It is argued that the most important issue regarding this is to recognise that there is something to the idea that imposing risks on people has a morally significant price, but that we must also acknowledge that taking precautionary measures to avoid or decrease such risks has such a price. The critical issue in the ethics of risk of relevance for PP thus becomes what constitutes a proper price of precaution. It is demonstrated how two simple constraints on this amkes it easy to meet many typical arguments against PP, but also how this issue must be further attacked by means transcending the traditional tools of normative ethics and decision theory, as well as how further reflection along such lines connects PP to issues of international.. (shrink)

In this paper, we explore the recent creation of “iBlastoids,” which are 3-D structures that resemble early human embryos prior to implantation which formed via self-organization of reprogrammed ad...

This paper argues that a precautionary approach to scientific progress of the sort advocated by Walter Glannon with respect to life-extending therapies involves both incoherence and irresolvable paradox. This paper demonstrates the incoherence of the precautionary approach in many circumstances and argues that with respect to life-extending therapies we have at present no persuasive reasons for a moratorium on such research.