Name der Zeitschrift: Semiotica Jahrgang: 2015 Heft: 207 Seiten: 327-368.

Digital Voice Assistants have become a ubiquitous technology in today’s home and childhood environments. Inspired by original study on how children’s ontological conceptualizations of life and technology were systematically associated with their real-world exposure to robotic entities, the current study explored this association for children in their middle childhood and with different levels of DVA-exposure. We analyzed correlational survey data from 143 parent–child dyads who were recruited on ‘Amazon Mechanical Turk’. Children’s ontological conceptualization patterns of life and technology were measured (...) by asking them to conceptualize nine prototypical organically living and technological entities with respect to their biology, intelligence, and psychology. Their ontological conceptualization patterns were then associated with their DVA-exposure and additional control variables. Compared to biology and psychology, intelligence was a less differentiating factor for children to differentiate between organically living and technological entities. This differentiation pattern became more pronounced with technological affinity. There was some evidence that children with higher DVA-exposure differentiated more rigorously between organically living and technological entities on the basis of psychology. To the best of our knowledge, this is the first study exploring children’s real-world exposure to DVAs and how it is associated with their conceptual understandings of life and technology. Findings suggest although psychological conceptualizations of technology may become more pronounced with DVA-exposure, it is far from clear such tendencies blur ontological boundaries between life and technology from children’s perspective. (shrink)

Background Healthcare systems are increasingly struggling with resource constraints, given demographic changes, technological development, and citizen expectations. The aim of this article is to normatively analyze different suggestions regarding how publicly financed plastic surgery should be delineated in order to identify a well-considered, normative rationale. The scope of the article is to discuss general principles and not define specific conditions or domains of plastic surgery that should be treated within the publicly financed system. Methods This analysis uses a reflective equilibrium (...) approach, according to which considered normative judgements in one area should be logically and argumentatively coherent with considered normative judgements and background theories at large within a system. Results and conclusions In exploring functional versus non-function conditions, we argue that it is difficult to find a principled reason for an absolute priority of functional conditions over non-functional conditions. Nevertheless, functional conditions are relatively easier to establish objectively, and surgical intervention has a clear causal effect on treating a functional condition. Considering non-functional conditions that require plastic surgery [i.e., those related to appearance or symptomatic conditions ], we argue that the patient needs to experience some degree of suffering, which must be ‘validated’ in some form by the healthcare system. This validation is required for both functional and non-functional conditions. Functional conditions are validated by distinguishing between statistically normal and abnormal functioning. Similarly, for non-functional conditions, statistical normality represents a potential method for distinguishing between what should and should not be publicly funded. However, we acknowledge that such a concept requires further development. (shrink)

A representation theorem is obtained for contraction operators that are based on Levi's recent proposal that selection functions should be applied to the set of saturatable contractions, rather than to maximal subsets as in the AGM framework. Furthermore, it is shown that Levi's proposal to base the selection on a weakly monotonic measure of informational value guarantees the satisfaction of both of Gärdenfors' supplementary postulates for contraction. These results indicate that Levi has succeeded in constructing a well-behaved operation of contraction (...) that does not satisfy the postulate of recovery. (shrink)

How to handle orphan drugs for rare diseases is a pressing problem in current health-care. Due to the group size of patients affecting the cost of treatment, they risk being disadvantaged in relation to existing cost-effectiveness thresholds. In an article by Niklas Juth it has been argued that it is irrelevant to take indirectly operative factors like group size into account since such a compensation would risk discounting the use of cost, a relevant factor, altogether. In this article we analyze (...) Juth’s argument and observe that we already do compensate for indirectly operative factors, both outside and within cost-effectiveness evaluations, for formal equality reasons. Based on this we argue that we have reason to set cost-effectiveness thresholds to integrate equity concerns also including formal equality considerations. We find no reason not to compensate for group size to the extent we already compensate for other factors. Moreover, groups size implying a systematic disadvantage also on a global scale, i.e. taking different aspects of the health condition of patients suffering from rare diseases into account, will provide strong reason for why group size is indeed relevant to compensate for. (shrink)

Intensive research is carried out to develop a disease-modifying drug for Alzheimer’s disease. The development of drug candidates that reduce Aß or tau in the brain seems particularly promising. However, these drugs target people at risk for AD, who must be identified before they have any, or only moderate, symptoms associated with the disease. There are different strategies that may be used to identify these individuals. Each of these strategies raises different ethical challenges. In this paper, we analyse these challenges (...) in relation to the risk stratification for AD necessary for using these drugs. We conclude that the new drugs must generate large health benefits for people at risk of developing AD to justify the ethical costs associated with current risk stratification methods, benefits much larger than current drug candidates have. This conclusion raises a new set of ethical questions that should be further discussed. No data are available. (shrink)

How should scarce healthcare resources be distributed? This is a contentious issue that became especially pressing during the pandemic. It is often emphasised that studies exploring public views about this question provide valuable input to the issue of healthcare priority setting. While there has been a vast number of such studies it is rarely articulated, more specifically, what the results from these studies would mean for the justification of principles for priority setting. On the one hand, it seems unreasonable that (...) public values would straightforwardly decide the ethical question of how resources should be distributed. On the other hand, in a democratic society, it seems equally unreasonable that they would be considered irrelevant for this question. In this paper we draw on the notion of reflective equilibrium and discuss the relevance and roles that empirical studies may plausibly have for justification in priority setting ethics. We develop a framework for analysing how different kinds of empirical results may have different kinds of implications for justification. (shrink)

In this paper we explore the relation between health-care needs and patients’ desires within shared decision-making in a context of priority setting in health care. We begin by outlining some general characteristics of the concept of health-care need as well as the notions of SDM and desire. Secondly we will discuss how to distinguish between needs and desires for health care. Thirdly we present three cases which all aim to bring out and discuss a number of queries which seem to (...) arise due to the double focus on a patient’s need and what that patient desires. These queries regard the following themes: the objectivity and moral force of needs, the prediction about what kind of patients which will appear on a micro level, implications for ranking in priority setting, difficulties regarding assessing and comparing benefits, and implications for evidence-based medicine. (shrink)

Workplace inspections are undertaken because they are believed to lead to better conditions In the workplace. It is therefore essential to know if inspections have the desired effects on working conditions. We introduce a theoretical framework for the evaluation of workplace inspections with respect to their effects on working conditions. Criteria of efficiency and priority-setting are discussed. Some empirical results concerning priority-setting in Swedish inspection agencies are presented. Further, we argue that in order to obtain reliable information about the effects (...) of different inspection methods, it is necessary to perform controlled comparative studies in which different methods are used in different workplaces. Given the facility with which such studies can be performed, it is surprising how few such studies have been made. We conclude by surveying some empirical studies that concern the issue of efficient inspections. (shrink)

In this study of an economic field and its relationships to a cultural field, we apply Pierre Bourdieu’s central concepts of economic capital, cultural capital, symbolic capital and field, and thus follow in a tradition that at the outset was considered to be post-structuralism, but which by Bourdieu later has been brought into the realm of realism. We have mapped relationships between the actors and thus the field structures that these relationships entail. The fields in which a segment of an (...) art world is operating is represented in multi-dimensional figures which illustrate relationships and bonds between the different categories of organizations. Some of the business actors we have studied are engaging in cultural activities with a great deal of autonomy, others are connected to the cultural field in less active ways. In participating in the cultural field they are in different ways and to different extents accumulating symbolic capital including prestige and honor. The method we have applied is multiple correspondence analysis which was frequently used by Bourdieu. (shrink)

Why do some people withdraw from biobank studies? To our knowledge, very few studies have been done on the reflections of biobank ex-participants. In this article, we report from such a study. 16 years ago, we did focus group interviews with biobank participants and ex-participants. We found that the two groups interestingly shared worries concerning the risks involved in possible novel uses of their biobank material, even though they drew opposite conclusions from their worries. Revisiting these interviews today reveals a (...) remarkable relevance to present concerns, since the possible developments that worried ex-participants and participants 16 years ago now are becoming realities. Drawing on conceptual distinctions by sociologist and philosopher Niklas Luhmann, we argue that while ex-participants express a loss of trust in the biobank institution to manage the use of their biobank material in a legitimate way, remaining participants expressed confidence in the management of the biobank institution to secure their interests. This analysis brings out important aspects of emerging trends in biobank research participation. (shrink)

We prove that four theses commonly associated with coherentism are incompatible with the representation of a belief state as a logically closed set of sentences. The result is applied to the conventional coherence interpretation of the AGM theory of belief revision, which appears not to be tenable. Our argument also counts against the coherentistic acceptability of a certain form of propositional holism. We argue that the problems arise as an effect of ignoring the distinction between derived and non-derived beliefs, and (...) we suggest that the kind of coherence relevant to epistemic justification is the coherence of non-derived beliefs. (shrink)

It is uncontroversial to claim that the extent to which health care interventions benefit patients is a relevant consideration for health care priority setting. However, when effects accrue to the individual patient, effects of a more indirect kind may accrue to other individuals as well, such as the patient's children, friends, or partner. If, and if so how, such relational effects should be considered relevant in priority setting is contentious. In this paper, we illustrate this question by using disease‐modifying drugs (...) for Alzheimer's disease as a case in point. The ethical analysis begins by sketching the so‐called prima facie case for ascribing moral weight to relational effects and then moves on to consider a number of objections to it. We argue that, whereas one set of objections may be dismissed, there is another set of arguments that poses more serious challenges for including relational effects in priority setting. (shrink)

In Gustavsson et al,1 we discussed the ethical issues that arise when identifying the relevant population for disease-modifying drugs targeting Alzheimer disease. More specifically, we focused on novel immunotherapies aimed at amyloid β and tau, two relevant biomarkers. The commentaries to our paper2 3 acknowledge our conclusion: screening for AD involve ethical costs that cannot be justified unless a drug with clinically relevant effect becomes available. Since Aduhelm is the only immunotherapy targeting AD currently approved by the Food and Drug (...) Administration, we use that as a …. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Disaster Anarchy: Mutual Aid and Radical Action by Rhiannon FirthJohn-Erik HanssonRhiannon Firth. Disaster Anarchy: Mutual Aid and Radical Action. London: Pluto Press, 2022. Paperback, 243 pp. ISBN 9780745340463The COVID-19 pandemic and the unfolding climate crisis, with the multiplication of unprecedented weather events, have shown how urgent it is to reflect on our responses to disaster. Following up on themes she first broached in Coronavirus, Class, and Mutual (...) Aid in the United Kingdom, Rhiannon Firth throws a fresh, anarchist, and utopian light on disaster relief in Disaster Anarchy.1 In this work, Firth seeks to “consider how [anarchist] social movements’ impressive efforts in mutual aid might contribute to a radical and revolutionary reconceptualisation of disasters and the processes of relief and recovery efforts” (19). To do so, she begins by surveying the dominant approaches to disaster relief (chapters 2 and 3) before offering a comprehensive anarchist theoretical critique of these perspectives (chapter 4). Firth then fleshes out her anarchist theory of disaster and community response through two empirical case studies of grassroots relief efforts. In chapter 5 she looks into the Occupy Sandy movement, a New York area community-based response to the damage caused by Hurricane Sandy’s passage in October 2012 in the United States. The final chapter is then dedicated to the COVID-19 Mutual Aid Groups that emerged in the United Kingdom during the pandemic.In building her argument, Firth mobilizes anarchist (and more broadly radical) theory and interviews with participants in both movements. She engages with how activists motivated and understood their participation in mutual aid groups, perceived disaster and relief organizing, sought to solve practical and political problems, and reflected on their experiences. The empirical sections of Disaster Anarchy are thus reminiscent of investigations into the anarchist connections and orientations of contemporary social movements, such as Occupy Wall Street.2 However, Firth’s is a work [End Page 606] of political theory. Her interviews were not conducted simply to describe and analyze the anarchist components of disaster relief social movements. Echoing Uri Gordon, she proposes to take the “worldviews of activists seriously as sources of theoretical knowledge,” leading us to rethink both anarchism and the politics of disaster as a whole (16).3 There lies a key part of the originality of Firth’s contribution to both anarchist theory and to the study of disaster relief. The utopian core of Disaster Anarchy also shines through this movement-based theoretical elaboration of an anarchist challenge to the dominant theories and practices of disaster relief. By examining mutual aid groups in critical dialogue with anarchist theory, Firth raises the possibility of more egalitarian and democratic “utopian alternatives to the status quo,” though, as she reminds us, they always run the risk of being co-opted (20).To set the scene for the desirability of anarchist approaches to disaster relief, Disaster Anarchy opens with Firth’s dissatisfaction with what she identifies as the two main sets of approaches to disaster studies. The first represents “the dominant neoliberal paradigm of disaster politics” and falls under the umbrella of “Disaster Risk Reduction (DRR)” (21). Firth contends that, despite some internal variety, all DRR approaches share the three same basic assumptions. First, DRR considers disasters to be “ruptures in the normal functioning of society.” They become a “management problem” that must be dealt with using the tools of political governance to restore order and ensure “systemic stability” (39–40). This can be done both directly through state institutions, and through civil society-based nongovernmental organizations (NGOs) that cooperate with state institutions. DRR then evaluates responses using the categories of “efficiency and cost-effectiveness,” leaving aside “the affects and human impacts of disasters” (40). Second, DRR tends to flatten out differences between disasters, and in the ways in which individuals and groups respond to them. Disaster becomes abstract, and authorities can design sets of responses taken to be effective regardless of local contexts and demands. DRR approaches are therefore particularly congenial to the growth of large governmental “specialised agencies like DHS [Department of Homeland Security] and FEMA [Federal Emergency Management Agency]” that produce knowledge and practices linked to the vertical “management of disaster” (41). Finally... (shrink)

ABSTRACTIn this paper, I approach the political and philosophical similarities and differences between late eighteenth-century thinkers John Thelwall and William Godwin from the point of view of their respective choices for the genre of political communication. I approach their thought and its expression by weaving an interpretation of what they were saying with a reflection on how and to whom they were speaking. This, I contend, helps us clarify further the thought of each thinker and track the changes in their (...) conception of equality in the framework of political communication. As the 1790s unfolded, both thinkers, I argue, tried to diversify their audience, be generally more inclusive, and re-think the hierarchies of relationship between authors/speakers and their audience in their political communication. Nevertheless, they did so asymmetrically and in different ways: Thelwall quickly started tapping into popular culture, especially oral culture, while Godwin chose the modes of fiction and the conversational essay. By making these choices, both authors enacted a different understanding and practice of political education, and political equality. (shrink)

Priority setting in health care is ubiquitous and health authorities are increasingly recognising the need for priority setting guidelines to ensure efficient, fair, and equitable resource allocation. While cost-effectiveness concerns seem to dominate many policies, the tension between utilitarian and deontological concerns is salient to many, and various severity criteria appear to fill this gap. Severity, then, must be subjected to rigorous ethical and philosophical analysis. Here we first give a brief history of the path to today’s severity criteria in (...) Norway and Sweden. The Scandinavian perspective on severity might be conducive to the international discussion, given its long-standing use as a priority setting criterion, despite having reached rather different conclusions so far. We then argue that severity can be viewed as a multidimensional concept, drawing on accounts of need, urgency, fairness, duty to save lives, and human dignity. Such concerns will often be relative to local mores, and the weighting placed on the various dimensions cannot be expected to be fixed. Thirdly, we present what we think are the most pertinent questions to answer about severity in order to facilitate decision making in the coming years of increased scarcity, and to further the understanding of underlying assumptions and values that go into these decisions. We conclude that severity is poorly understood, and that the topic needs substantial further inquiry; thus we hope this article may set a challenging and important research agenda. (shrink)

In a recent extended essay, philosopher Daniel Hausman goes a long way towards dismissing severity as a morally relevant attribute in the context of priority setting in healthcare. In this response, we argue that although Hausman certainly points to real problems with how severity is often interpreted and operationalised within the priority setting context, the conclusion that severity does not contain plausible ethical content is too hasty. Rather than abandonment, our proposal is to take severity seriously by carefully mapping the (...) possibly multiple underlying accounts to well-established ethical theories, in a way that is both morally defensible and aligned with the term’s colloquial uses. (shrink)

In recent years, the issue of accepting a higher cost per health improvement for orphan drugs has been the subject of discussion in health care policy agencies and the academic literature. This article aims to provide an analysis of broadly egalitarian arguments for and against accepting higher costs per health improvement. More specifically, we aim to investigate which arguments one should agree upon putting aside and where further explorations are needed. We identify three kinds of arguments in the literature: considerations (...) of substantial equality, formal equality, and opportunity cost. We argue that considerations of substantial equality do not support higher costs per health improvement orphan drugs, even if such considerations are considered valid. On the contrary, arguments of formal equality may support accepting a higher cost per health improvement for orphan drugs. However, in order to do so, a number of both normative and empirical issues must be resolved; these issues are identified in the article. For instance, it must be settled to what extent the opportunity cost in terms of foregone health for other patients is acceptable in order to uphold formal equality. We conclude that certain arguments can be set aside, and future focus should be put on the unresolved normative and empirical issues related to formal equality and opportunity cost. (shrink)

In Parkinson’s disease, the fronto-striatal network is involved in motor and cognitive symptoms. Working memory updating training engages this network in healthy populations, as observed by improved cognitive performance and increased striatal BOLD signal. This two-part study aimed to assess the feasibility of WM updating training in PD and measure change in cognition, movement and functional brain response in one individual with PD after WM updating training. A feasibility and single-subject study were performed in which patients with PD completed computerized (...) WM updating training. The outcome measures were the pre-post changes in criterion and transfer cognitive tests; cognitive complaints; psychological health; movement kinematics; and task-related BOLD signal. Participants in the feasibility study showed improvements on the criterion tests at post-test. FL displayed the largest improvements on the criterion tests and smaller improvements on transfer tests. Furthermore, FL reported improved cognitive performance in everyday life. A shorter onset latency and smoother upper-limb goal-directed movements were measured at post-test, as well as increased activation within the striatum and decreased activation throughout the fronto-parietal WM network. This two-part study demonstrated that WM updating training is feasible to complete for PD patients and that change occurred in FL at post-test in the domains of cognition, movement and functional brain response. (shrink)

Marxism: Crisis or Renewal? It has become commonplace nowadays to speak of a crisis— and even of the end— of Marxism. This dire forecast can hardly be ...

In the first part of this paper, I clear the ground from frequent misconceptions of the relationship between fact and value by examining some uses of the adjective “natural” in ethical controversies. Such uses bear evidence to our “natural” tendency to regard nature as the source of ethical norms. I then try to account for the origins of this tendency by offering three related explanations, the most important of which is evolutionistic: if any behaviour that favours our equilibrium with the (...) environment is potentially adaptive, nothing can be more effective for this goal than developing an attitude toward the natural world that considers it as a dispenser of sacred norms that must be invariably respected. By referring to the Aristotelian notion of human flourishing illustrated in the first part of the paper, in the second I discuss as a case study some ethical problems raised by mini-chips implantable in our bodies. I conclude by defending their potential beneficial effects of such new technological instruments. (shrink)

Aggregating individuals’ consistent attitudes might produce inconsistent collective attitudes. Some groups therefore need the capacity to form attitudes that are irreducible to those of their members. Such groups, group-agent realists argue, are agents in control of their own attitude formation. In this paper, however, I show how group-agent realism overlooks the important fact that groups consist of strategically interacting agents. Only by eliminating group agency from our social explanations can we see how individuals vote strategically to gain control of their (...) groups and produce collective attitudes we cannot make sense of if we treat groups as agents. (shrink)

Trust among current and future patients is essential for the success of biobank research. The submission of an informed consent is an act of trust by a patient or a research subject, but a strict application of the rule of informed consent may not be sensitive to the multiplicity of patient interests at stake, and could thus be detrimental to trust. According to a recently proposed law on “genetic integrity” in Sweden, third parties will be prohibited from requesting or seeking (...) genetic information about an individual. Cumbersome restrictions on research may be lifted, thus creating a more favourable climate for medical research. (shrink)

The empirical basis for this article is threeyears of experience with ethical rounds atUppsala University Hospital. Three standardapproaches of ethical reasoning are examined aspotential explanations of what actually occursduring the ethical rounds. For reasons given,these are not found to be satisfyingexplanations. An approach called ``imaginativeethics'', is suggested as a more satisfactoryaccount of this kind of ethical reasoning. Theparticipants in the ethical rounds seem to drawon a kind of moral competence based on personallife experience and professional competence andexperience. By listening to (...) other perspectivesand other experiences related to one particularpatient story, the participants imaginealternative horizons of moral experience andexplore a multitude of values related toclinical practice that might be at stake. Inhis systematic treatment of aesthetics in theCritique of Judgement, Kant made use ofan operation of thought that, if applied toethics, will enable us to be more sensitive tothe particulars of each moral situation. Basedon this reading of Kant, an account ofimaginative ethics is developed in order tobring the ethical praxis of doctors and nursesinto sharper relief. The Hebraic and theHellenic traditions of imagination are used inorder to illuminate some of the experiences ofethical rounds. In conclusion, it is arguedthat imaginative ethics and principle-basedethics should be seen as complementary in orderto endow a moral discourse with ethicalauthority. Kantian ethics will do the job if itis remembered that Kant suggested only amodest, negative role of principle-baseddeliberation. (shrink)

C. S. Lewis is one of the most beloved Christian apologists of the twentieth century; David Hume and Bertrand Russell are among Christianity’s most important critics. This book puts these three intellectual giants in conversation with one another on various important questions: the existence of God, suffering, morality, reason, joy, miracles, and faith. Alongside irreconcilable differences, surprising areas of agreement emerge. Curious readers will find penetrating insights in the reasoned dialogue of these three great thinkers.

The concept of ecosystem services is a way of visualizing the instrumental value that nature has for human beings. Most ecosystem services can be performed by more than one species. This fact is sometimes used as an argument against the preservation of species. However, even though substitutability does detract from the instrumental value of a species, it also adds option value to it. The option value cannot make a substitutable species as instrumentally valuable as a non-substitutable species, but in many (...) cases, it can add enough value to make the species more valuable than the projects that threaten its existence. (shrink)

This article is an attempt at a systematic account of decision making under greater uncertainty than what traditional, mathematically oriented decision theory can cope with. Four components of great uncertainty are distinguished: (1) the identity of the options is not well determined (uncertainty of demarcation) ; (2) the consequences of at least some option are unknown (uncertainty of consequences); (3) it is not clear whether information obtained from others, such as experts, can be relied on (uncertainty of reliance); and (4) (...) the values relevant for the decision are not determined with sufficient precision (uncertainty of values). Some possible strategy types are proposed for each of these components. Decisions related to environmental issues are used to illustrate the proposals. (shrink)

Implant ethics is defined here as the study of ethical aspects of the lasting introduction of technological devices into the human body. Whereas technological implants relieve us of some of the ethical problems connected with transplantation, other difficulties arise that are in need of careful analysis. A systematic approach to implant ethics is proposed. The major specific problems are identified as those concerning end of life issues (turning off devices), enhancement of human capabilities beyond normal levels, mental changes and personal (...) identity, and cultural effects. (shrink)

Angesichts der ökologischen Krise und der zunehmenden Zivilisationsprobleme ist es notwendig, einen philosophischen Naturbegriff, der das Verhältnis des Menschen zur Natur aufgrund dieser Tatsache neu bestimmt, zu entwickeln. Der Jesuit, Paläontologe und Philosoph Pierre Teilhard de Chardin (1881-1955) ist ein herausragendes Beispiel einer Vermittlung von Naturwissenschaft und Naturphilosophie. Teilhard entwirft eine Zusammenschau von transzendent-metaphysischer Teleologie, die aus dem christlichen Glauben heraus Gott als einzige Zweckursache des Geschehens sieht, philosophischer Anthropologie und naturwissenschaftlich orientierter kausalmechanischer Evolutionstheorie, dem allmählichen Entwickeln eines höheren Zustands (...) aus einem vorhergehenden. Die in der Ursache gegründeten Seinszusammenhänge ergeben einen vom Ziel her bestimmten Zusammenhang. Gott ist Totum alles wirklich Seienden im Horizont des möglichen Seins. Das für Teilhard so wichtige teleologische Prinzip hat seinen philosophiehistorischen Ursprung bei Aristoteles, der damit eine Denktradition begründete, die im Gegensatz zum kausal-mechanischen Weltbild der Naturwissenschaften steht und die sich über Thomas von Aquin und Hegel bis zu Teilhard als vorläufig letztem Höhepunkt erhält. Der aus Teilhards Naturphilosophie folgende Optimismus kann von großer Bedeutung für die Gegenwart sein. Er resultiert aus der Übernahme von Verantwortung für die Schöpfung und ist die ethische Konsequenz aus Naturfinalität und christlichem Universalismus. Der Autor: Erik Lehnert, geb. 1975 in Berlin. Studium der Philosophie, Geschichte sowie Ur- und Frühgeschichte in Berlin, z. Z. Promotion über die Aktualität der Philosophie von Karl Jaspers. 1995 bis 1997 Mitherausgeber von "Aletheia - Neues kritisches Journal der Philosophie, Theologie, Geschichte und Politik", Veröffentlichungen u.a. zur Philosophie des 19. Jahrhunderts. (shrink)

One can (for the most part) formulate a model of a classical system in either the Lagrangian or the Hamiltonian framework. Though it is often thought that those two formulations are equivalent in all important ways, this is not true: the underlying geometrical structures one uses to formulate each theory are not isomorphic. This raises the question of whether one of the two is a more natural framework for the representation of classical systems. In the event, the answer is yes: (...) I state and sketch proofs of two technical results—inspired by simple physical arguments about the generic properties of classical systems—to the effect that, in a precise sense, classical systems evince exactly the geometric structure Lagrangian mechanics provides for the representation of systems, and none provided by Hamiltonian. The argument not only clarifies the conceptual structure of the two systems of mechanics, but also their relations to each other and their respective mechanisms for representing physical systems. It also shows why naïvely structural approaches to the representational content of physical theories cannot work. [Lagrange] grasped that he had gained a method of stating dynamical truths in a way, which is perfectly indifferent to the particular methods of measurement employed in fixing the positions of the various parts of the system. Accordingly, he went on to deduce equations of motion, which are equally applicable whatever quantitative measurements have been made, provided that they are adequate to fix positions. The beauty and almost divine simplicity of these equations is such that these formulae are worthy to rank with those mysterious symbols which in ancient times were held directly to indicate the Supreme Reason at the base of all things. (Whitehead [1948], p. 63)1. Introduction2.Classical Systems3. The Possible Interactions of a Classical System and the Structure of Its Space of States4. Classical Systems Are Lagrangian5. Classical Systems Are Not Hamiltonian6. How Lagrangian and Hamiltonian Mechanics Represent Classical Systems7. The Conceptual Structure of Classical Mechanics. (shrink)

Clear-cut cases of decision-making under risk (known probabilities) are unusual in real life. The gambler’s decisions at the roulette table are as close as we can get to this type of decision-making. In contrast, decision-making under uncertainty (unknown probabilities) can be exemplified by a decision whether to enter a jungle that may contain unknown dangers. Life is usually more like an expedition into an unknown jungle than a visit to the casino. Nevertheless, it is common in decision-supporting disciplines to proceed (...) as if reasonably reliable probability estimates were available for all possible outcomes, i.e. as if the prevailing epistemic conditions were analogous to those of gambling at the roulette table. This mistake can be called the tuxedo fallacy. It is argued that traditional engineering practices such as safety factors and multiple safety barriers avoid this fallacy and that they therefore manage uncertainty better than probabilistic risk analysis (PRA). PRA is a useful tool, but it must be supplemented with other methods in order not to limit the analysis to dangers that can be assigned meaningful probability estimates. (shrink)