In this paper, I argue that logic hasan important role to play in the methodological studyof creativity. I also argue, however, that onlyspecial kinds of logic enable one to understand thereasoning involved in creative processes. I show thatdeductive and ampliative adaptive logics areappropriate tools in this respect.

This paper questions the shifting meaning of the ethical categories of proximity and alterity in the light of the technological and social changes that virtual social worlds went through. It takes Roger Silverstone’s key theme of “proper distance” as a point of departure, and discusses the significance of this concept by linking it up with the more media-theoretical approaches on virtual communication as developed in McLuhan’s and Baudrillard’s body of thought. It is argued that today’s virtual realities ask for both (...) a philosophical and media-sociological reconsideration of the traditional ethical category of alterity. As such, it links up with Feenberg’s idea that “online groups are indeed a qualitatively new medium” (A. Feenberg and M. Bakardjieva, “Virtual Community: No ‘Killer Implication,’” New Media & Society 6(1) (2004): 37–43, 41), but at the same time challenges Feenberg’s reservations about a theory of media centrism. (shrink)

For centuries, inconsistencies were seen as a hindrance to good reasoning, and their role in the sciences was ignored. In recent years, however, logicians as well as philosophers and historians have showed a growing interest in the matter. Central to this change were the advent of paraconsistent logics, the shift in attention from finished theories to construction processes, and the recognition that most scientific theories were at some point either internally inconsistent or incompatible with other accepted findings. The new interest (...) gave rise to important questions. How is `logical anarchy' avoided? Is it ever rational to accept an inconsistent theory? In what sense, if any, can inconsistent theories be considered as true? The present collection of papers is the first to deal with this kind of questions. It contains case studies as well as philosophical analyses, and presents an excellent overview of the different approaches in the domain. (shrink)

In this paper, I present two ampliative adaptive logics: LA and LAk. LA is an adaptive logic for abduction that enables one to generate explanatory hypotheses from a set of observational statements and a set of background assumptions. LAk is based on LA and has the peculiar property that it selects those explanatory hypotheses that are empirically most successful. The aim of LAk is to capture the notion of empirical progress as studied by Theo Kuipers.

Detection of genetic aberrations in prenatal samples, obtained through amniocentesis or chorion villus biopsy, is increasingly performed using chromosomal microarray (CMA), a technique that can uncover both aneuploidies and copy number variants throughout the genome. Despite the obvious benefits of CMA, the decision on implementing the technology is complicated by ethical issues concerning variant interpretation and reporting. In Belgium, uniform guidelines were composed and a shared database for prenatal CMA findings was established. This Belgian approach sparks discussion: it is evidence-based, (...) prevents inconsistencies and avoids parental anxiety, but can be considered paternalistic. Here, we reflect on the cultural and moral bases of the Belgian reporting system of prenatally detected variants. (shrink)

In a small tract by Master Gerardus Odonis, found in the MSS Madrid, Bibl. Nac. 4229, ff. 204ra-207vb and Madrid, Bibl. Univ. 65, ff. 113ra-117va, which has the provisional title De natura universalis, attention is paid to the definition, the origin and the ontological status of the universal. Odonis is totally against the moderns' view that universals have a mental existence only. Instead he holds a view similar to that of Henry of Ghent : universals have the being of an (...) essence and are the basis of all intellectual operations. (shrink)

This critical edition of Matthew of Orléans' Sophistaria contains valuable information about the author's views on matters of ontology, modality, natural philosophy, and theology, and gives us a clear outline of the way in which thirteenth-century authors approached these subjects in works of logic.

The first critical edition of the Syncategoreumata by the thirteenth-century philosopher Peter of Spain , accompanied by a facing-page English translation to make its contents accessible to modern readers. The introduction gives an account of all the manuscripts used for the edition. Extensive indexes have been added to facilitate the reader's orientation in the book.

As euthanasia has become a widely debated issue in many Western countries, hospitals and nursing homes especially are increasingly being confronted with this ethically sensitive societal issue. The focus of this paper is how healthcare institutions can deal with euthanasia requests on an organizational level by means of a written institutional ethics policy. The general aim is to make a critical analysis whether these policies can be considered as organizational-ethical instruments that support healthcare institutions to take their institutional responsibility for (...) dealing with euthanasia requests. By means of an interpretative analysis, we conducted a process of reinterpretation of results of former Belgian empirical studies on written institutional ethics policies on euthanasia in dialogue with the existing international literature. The study findings revealed that legal regulations, ethical and care-oriented aspects strongly affected the development, the content, and the impact of written institutional ethics policies on euthanasia. Hence, these three cornerstones—law, care and ethics—constituted the basis for the empirical-based organizational-ethical framework for written institutional ethics policies on euthanasia that is presented in this paper. However, having a euthanasia policy does not automatically lead to more legal transparency, or to a more professional and ethical care practice. The study findings suggest that the development and implementation of an ethics policy on euthanasia as an organizational-ethical instrument should be considered as a dynamic process. Administrators and ethics committees must take responsibility to actively create an ethical climate supporting care providers who have to deal with ethical dilemmas in their practice. (shrink)

It is generally agreed upon today that scientific reasoning, like everyday reasoning, proceeds in a dynamic way: inferences derived at some stage in the reasoning process may at a later stage be rejected. This dynamics may be extrinsic or intrinsic. I shall call it extrinsic when previously derived conclusions are rejected on non-logical grounds, and intrinsic when their rejection is based on a purely logical analysis.

This volume widens the scope of research into the relation between religion and Enlightenment. The contributions demonstrate the impact of changing worldviews in a variety of intellectual disciplines and cultural milieus.

In this paper, I discuss the main difficulties one encounters whensolving problems with inconsistent constraints. I argue that in order to meetthese difficulties we need an inconsistency-adaptive logic that enables one toderive as many consequences as possible, but that at the sametime allows one to determine which consequences can be accepted. I showthat the inconsistency-adaptive logic ANA satisfies these requirements.

This paper presents and illustrates a formal logic for the abduction of singular hypotheses. The logic has a semantics and a dynamic proof theory that is sound and complete with respect to the semantics. The logic presupposes that, with respect to a specific application, the set of explananda and the set of possible explanantia are disjoint . Where an explanandum can be explained by different explanantia, the logic allows only for the abduction of their disjunction.

Adaptive logics typically pertain to reasoning procedures for which there is no positive test. In [7], we presented a tableau method for two inconsistency-adaptive logics. In the present paper, we describe these methods and present several ways to increase their efficiency. This culminates in a dynamic marking procedure that indicates which branches have to be extended first, and thus guides one towards a decision — the conclusion follows or does not follow — in a very economical way.

_A timely and provocative essay about the parallel lives of Rosa Luxemburg and Hannah Arendt and their mission for a more humane society__ “[A] short but moving book... Even better, the volume’s advice is not only pragmatically political—necessary during a time of threats to democracy and mounting failures to deal with the climate crisis—but modestly uplifting.”—Bill Marx, _Arts Fuse___ “An intimate and timely meditation on dark times, Hermsen’s illuminating essay offers readers a way to think with Hannah Arendt and Rosa (...) Luxemburg about how to build a more humane world in common.”—Samantha Rose Hill, author of ___Hannah Arendt__ Rosa Luxemburg (1871–1919) and Hannah Arendt (1906–1975) were critical Jewish mavericks who both suffered under violent political regimes and sought to reform systems of power. Although temporally separated by the Second World War and the rise of totalitarianism, they held in common strikingly similar convictions about freedom, human dignity, capitalism, democracy, and political commitment. In this powerful book, Joke J. Hermsen explores the lives and works of these two remarkable thinkers and the essential hope that emboldened them in the political struggle. Luxemburg and Arendt were spurred on by a restless love for the world and an unwavering belief in the possibility of new beginnings; for them, hope was an absolute prerequisite of resistance and a counterpoint to melancholy—a defense against despair that kept them attuned to what could be. Exploring the intertwined nature of philosophy and the active pursuit of justice, this is an urgent, courageous reminder to remain alert to the glimmers of hope in dark times. (shrink)

Janet Staiger _Perverse Spectators: The Practices of Film Reception_ New York and London: New York University Press, 2000 ISBN 0-8147-8139-X 242 pp.

In this paper, I present the modal adaptive logic $AJ^{r}$ (based on S5) as well as the discussive logic $D_{2}^{r}$ that is defined from it. $D_{2}^{r}$ is a (nonmonotonic) alternative for Jaśkowski's paraconsistent system D₂. Like D₂, $D_{2}^{r}$ validates all single-premise rules of Classical Logic. However, for formulas that behave consistently, $D_{2}^{r}$ moreover validates all multiple-premise rules of Classical Logic. Importantly, and unlike in the case of D₂, this does not require the introduction of discussive connectives. It is argued that (...) this has clear advantages with respect to one of the main application contexts of discussive logics, namely the interpretation of discussions. (shrink)

In the early eighties, philosophers of science came to the conviction that discovery and creativity form an integral part of scientific rationality. Ever since, the?positivists? have been criticised for their neglect of these topics. It is the aim of this paper to show that the positivists' approach to scientific discovery is not only much richer than is commonly recognized, but that they even defended an important thesis which some of the `friends of discovery' seem to have forgotten. Contrary to what (...) is generally accepted, I shall also show that there is no reason at all why the positivists should have ignored discovery. (shrink)

In this paper, we present the outline for a goal-directed proof procedure for abductive reasoning and compare this procedure with Aliseda’s approach.

The aim of this paper is twofold. First, I want to argue that the distinction between induction and deduction is less clear-cut than traditionally assumed, and that, moreover, most reasoning processes in the sciences involve an integration of inductive and deductive steps. Next, I want to show how so-called adaptive logics may lead to a better understanding of this integrated use of induction and deduction.

Objectives To describe the form and content of ethics policies on euthanasia in Flemish nursing homes and to determine the possible influence of religious affiliation on policy content. Methods Content analysis of euthanasia policy documents. Results Of the 737 nursing homes we contacted, 612 (83%) completed and returned the questionnaire. Of 92 (15%) nursing homes that reported to have a euthanasia policy, 85 (92%) provided a copy of their policy. Nursing homes applied the euthanasia law with additional palliative procedures and (...) interdisciplinary deliberations. More Catholic nursing homes compared to non-Catholic nursing homes did not permit euthanasia. Policies described several phases of the euthanasia care process as well as involvement of caregivers, patients, and relatives; ethical issues; support for caregivers; reporting; and procedures for handling advance directives. Conclusion Our study revealed that euthanasia requests from patients are seriously considered in euthanasia policies of nursing homes, with great attention for palliative care and interdisciplinary cooperation. (shrink)

_ Source: _Volume 56, Issue 3-4, pp 320 - 339 Thirteenth-century views on consequences have not yet received much attention. Authors of this period deserve closer scrutiny, because of their profound interest in the nature of consequence. The fundamental feature of a consequence was captured in the claim that its antecedent is the cause of its consequent. At the same time authors systematically discussed consequences in terms of truth-preservation. This paper considers the requirements of syllogistic argument and consequences in general, (...) including the role of ‘cause’ in the identification of syllogisms proper, looks at different descriptions of consequence, moves on to discussions of the syncategorema ‘_si_’ – in _syncategoremata_ treatises by Peter of Spain, Henry of Ghent, Nicholas of Paris and William of Sherwood, as well as some _sophismata_ tracts – and explores what thirteenth-century authors make of the truth-functional characterisation of consequence, showing how it clashes with the authors’ insistence on a causal connection between antecedent and consequent. (shrink)

Johannes Duns Scotus is begonnen met het onderzoek naar de werkelijkheid als ‘het volstrekt mogelijke’. In Kant zien we een radicale voortzetting van deze beweging, die echter tot een nieuw noodzakelijkheidsdenken heeft geleid. In de theorievorming over het menselijk individu, een onderwerp dat Duns Scotus zeer aan het hart ging, is dat determinisme nog niet overwonnen.