Stig Kanger made important contributions to logic and formal philosophy. Kanger's dissertation Provability in Logic, 1957, contained significant results in proof theory as well as the first fully worked out model-theoretic interpretation of quantified modal logic. It is generally accepted nowadays that Kanger was one of the originators of possible worlds semantics for modal logic. Kanger's most original achievements were in the areas of general proof theory, the semantics of modal and deontic logic, and the logical analysis of the (...) concept of rights. He also contributed to action theory, preference logic, and the theory of measurement. This is the first of two volumes dedicated to the work of Stig Kanger. The present volume is a complete collection of Kanger's philosophical papers. The second volume contains critical essays on Kanger's work, as well as biographical essays on Kanger written by colleagues and friends. (shrink)

Stig Kanger made important contributions to logic and formal philosophy. Kanger's most original achievements were in the areas of general proof theory, the semantics of modal and deontic logic, and the logical analysis of the concept of rights. But he contributed significantly to action theory, preference logic and the theory of measurement as well. This is the second of two volumes dedicated to the work of Stig Kanger. The first volume is a complete collection of Kanger's philosophical papers. (...) The present volume contains critical essays on the various aspects of Kanger's work as well as some biographical sketches. Lennart Åqvist, Jan Berg, Brian Chellas, Anatoli Degtyarev, Lars Gustafsson, Sören Halldén, Kaj Børge Hansen, Sven Ove Hansson, Risto Hilpinen, Jaakko Hintikka, Ghita Holmström-Hintikka, Lars Lindahl, Sten Lindström, Ingmar Pörn, Dag Prawitz, Wlodek Rabinowicz, Krister Segerberg, Amartya Sen, Sören Stenlund, Göran Sundholm, and Andrei Voronkov have contributed to this volume. (shrink)

Lewis, D. Semantic analyses for dyadic deontic logic.--Salomaa, A. Some remarks concerning many-valued propositional logics.--Chellas, B. F. Conditional obligation.--Jeffrey, R.C. Remarks on interpersonal utility theory.--Hintikka, J. On the proper treatment of quantifiers in Montague semantics.--Mayoh, B.H. Extracting information from logical proofs.--Åqvist, L. A new approach to the logical theory of actions and causality.--Pörn, I. Some basic concepts of action.--Bouvère, K. de. Some remarks concerning logical and ontological theories.--Hacking, I. Combined evidence.--Äberg, C. Solution to a problem raised by Stig Kanger (...) and a set theoretical statement equivalent to the axiom of choice.--Lindström, P. On characterizing elementary logic.-- Scott, D. Rules and derived rules.--Hansson, B. A program for pragmatics.--Hermerén, G. Models.--Fenstad, J.E. Remarks on logic and probability.--Stenlund, S. Analytic and synthetic arithmetical statements. (shrink)

In the work of both Ludwik Fleck and Thomas Kuhn the scientific literature plays important roles for stability and change of scientific phenomenal worlds. In this article we shall introduce the analyses of scientific literature provided by Fleck and Kuhn, respectively. From this background we shall discuss the problem of how divergent thinking can emerge in a dogmatic atmosphere. We shall argue that in their accounts of the factors inducing changes of scientific phenomenal worlds Fleck and Kuhn offer substantially different (...) approaches, and we shall discuss in which respects their approaches may be compatible. (shrink)

The content of this book is essentially one argument. The aim of this book is to consider the breakdown of a certain world view during the twentieth century. This is mirrored in the treatment of both science and philosophy. As these form the foundation for the human position in the world, a major reorganization of the body of knowledge had to take place. Bohr and Wittgenstein have been chosen as the main actors to represent this revision. Each one had to (...) replace apparent order and certainty by an understanding based on limited concepts in constant flux. The conclusion is that the modern synthesis is far from satisfactory. By leaving the story unfinished in its present state, the book hopes to provoke a renewal of the discussion and the eventual emergence of a reformed clarity and understanding. Reality is to be left as it is, but the human mind is also to be left as it is. The problem is to find a way to effect a harmonious combination of these. (shrink)

`Proto-idea' was a central concept in the thinking of the Polish microbiologist and philosopher of science Ludwik Fleck (1896–1961). Based on studies of the origin of the modern concept of syphilis, Fleck claimed that many established scientific facts are best understood as interpretations of pre scientific, somewhat hazy `proto-ideas' in the framework of a certain `thought-style'. As an example,Fleck saw the modern knowledge of infection as an interpretation of the ancient proto-idea of diseases as caused by minute `animalcules'. However, the (...) epistemological aspects of the concept of proto-ideas have only been sparsely developed and discussed by Fleck and his critics. This paper attempts to bridge the gap. Firstly, I reconstruct the concept of proto-ideasin the context of Fleck's constructivist theory of knowledge. Secondly, I illustrate the relation between Fleck's concept of proto-ideas and his nominalist view on medical taxonomy. Finally, I discuss four philosophical problems implied by Fleck's concept of proto-ideas: (a) the problem of combining two conflicting perspectives on the history of science (b) the problem of accounting for the notion of` continuity' within a non realist theory of knowledge (c) the problem of ascribing no truth-content to proto-ideas, and (d) the problem concerning the non-neutrality of the analyst's viewpoint. (shrink)

This article studies the Islamic State's only remaining periodical, Al-Naba, identifying the most common tropes and patterns in the periodical's Sub-Saharan Africa coverage, and on Mozambique in particular. The Islamic State's increasingly important coverage of Africa focuses on terror attacks, military campaigns and on the fight against Christianity. However, it also employs more traditional anti-colonial arguments that have been used by other, more accepted, political actors during the struggle for decolonisation. Al-Naba also functions as a 'shamer' of non-African Muslims, to (...) get them to join jihad by pointing to the African successes of the organisation and set these successes up as examples to be followed. In this sense, the article illustrates how African jihadist branches can have global agency. (shrink)

Technology is increasingly subject of attention from philosophers. Philosophical reflection on technology exhibits a wide and at times bewildering array of approaches and modes of thought. This volume brings to light the development of three schools in the philosophy of technology. Based on thorough introductions to Karl Marx', Martin Heidegger's and John Dewey's thought about technology, the volume offers an in-depth account of the way thinkers in the critical, the phenomenological and the pragmatic schools have respond to issues and challenges (...) raised by the works of the founders of these schools. Technologies in almost any aspect of human life is potentially subject of philosophical treatment. To offer a focused demonstration of key arguments and insights, the presentation of each school is concluded with a contribution to discussions of educational technologies. In addition to philosophers seeking a valuable and clear structuring of a still burgeoning field, the volume is of interest to those working with educational philosophy and value sensitive design. „Stig Børsen Hansen’s book is a must for all interested in understanding the development of the philosophy of technology and the relation of thoughts of thinkers that have shaped the area. The author presents a new and refreshing take on the ideas from Marx to Marcuse, from Dewey to Latour, and Heidegger to Borgmann. It will engage and hopefully provoke." Dr. Jan Kyrre Berg Friis, University of Copenhagen. (shrink)

In the mid-1980s, Dario Donatelli participated in a laboratory study of the effects of around 800 h of practice on digit-span and increased his digit-span from 8 to 104 digits. This study assessed changes in the structure of his memory skill after around 30 years of essentially no practice on the digit-span task. On the first day of testing, his estimated span was only 10 digits, but over the following 3 days of testing it increased to 19 digits. Further analyses (...) of his recall performance and verbal reports identified which mechanisms of the original memory skill he could retrieve or reacquire over the 3 days of practice. We discuss theoretical implications for the retention of skilled memory performance, the effects of age-related changes in memory on it, and for the future study of the effects of disuse on exceptional performance and complex skill. (shrink)

This Festschrift bears impressive testimony to the fascination which Icelandic and Norwegian sagas and Faroese ballads still exercise on researchers. Fifteen original papers examine central literary and historical aspects of Nordic sagas and ballads. The papers are published in German, English or Danish.

Summary According to the so-called Starnberger Group1, the amenability of a science to science policy measures, conceptualised by the Group in terms of finalization , depends crucially on conditions intrinsic to the science not invariably present at every stage of its development. Finalization is possible only at junctures where the science in question faces methodologically divergent alternative lines of development. The most significant kind of case depends on the presence of completed , or classical , theories.

We consider the concept of entanglement for pure cases of finite dimensional state spaces. The criterion of unentangled states is related to demanding rank one of an associated eigenvalue problem. In addition to the conventional procedure based on the Schmidt decomposition, we devise a method based on the spectral resolution of unsymmetric matrices. In particular, we consider the case when all eigenvalues are zero, and find that the method still works.

This paper recognizes that quantum theory is not satisfactorily formulated; in spite of its empirical success, we may wish to consider the possibility to find more intuitively acceptable foundations. It is emphasized that the difference between classical physics and quantum theory lies in the fact that the latter depends in an essential way on classical descriptions of the observations from preparation to recording. In addition, only statistical predictions are possible. We discuss the case of entangled quantum systems. Performing an experiment (...) on one subsystem, we move a realized prediction to be a precondition for subsequent observations. The quantum features presented do not fit into a unified interpretation, they are found to be incompletely defined but pragmatically applied. No uniquely well defined interpretation is adequate for all cases. (shrink)

The purpose of this paper is to show that the methods of determining monetary values of biodiversity depend on one's ethical point of departure. After a short summary of the ethical principles of anthropocentrism and biocentrism, the paper discusses the problem wether we shouldextend the market system and let the price mechanism encompass biological diversity, i.e. put prices on biodiversity. Basically, the anthropocentric approach leads to an ethics of freedom, where the individual has the right to decide what is good (...) and to implement it. Then the individual's willingness to pay for biodiversity is a relevant criterion for its price. But the biocentric approach rather implies that an ethic of law is more important, valuing the real needs of Nature higher than the preferences of the individual consumers. Then the costs for protection or replacement are relevant, because they reflect what Nature needs.One further question concerns who is to decide the proces of biodiversity. If the willingness to pay is the criterion, then obviously the market should decide, using well-developed methods. If on the other hand the costs of protection or replacement are relevant, technical and economic experts have to calculat them—given the politically decided level of biodiversity to be restored.The basic question, whether the market and the price mechanism should be considered acceptable instruments to protect biodiversity, is not discussed in the paper. However, some environmentalists find the wish to maximize one's utility incompatible with environmental ethics. Also, the price mechanism may take various roles. Thus, prices may convey different information about the value of biodiversity, depending on which role we assign to them. (shrink)

This book explores two questions that are integral to the question of the existence of God. The first question concerns the meaning of "existence" and the second concerns the meaning of "God". Regarding the first question, this book motivates, presents and defends the meta-ontology found in Gottlob Frege's writings and defended by Michael Dummett, Crispin Wright and Bob Hale. Frege's approach to questions of existence has mainly found use in connection with abstract objects such as numbers. This is one of (...) the first studies to systematically present Fregean meta-ontology and apply it to theology. Frege's meta-ontology is informed by his context principle. According to this, logico-syntactic notions such as "singular term" and "predicate" are pivotal to questions of what exists. These notions serve to throw light on the second question. Through thorough engagement with Old as well and New Testament texts, the book shows how Frege's logico-syntactic notions are of crucial importance when seeking to understand the meaning and use of "God". To complete the defence of Fregean meta-ontology, the book concludes by pointing to important differences between the otherwise closely associated concepts of an object found in Wittgenstein's Tractatus Logico-Philosophicus and Frege's writings. (shrink)

Recent proposals for a return to introspective methods make it necessary to review the central problems that led psychologists to abandon those methods as sources of scientific data in the early twentieth century. These problems and other related challenges to verbal reports collected during the cognitive revolution during the 1960s and 1970s were discussed in Ericsson and Simon's proposal for a theoretically motivated procedure to elicit valid and non- reactive concurrent verbalization of thoughts while subjects were performing tasks. The (...) same proposal explains why other verbal reports, such as introspections, detailed descriptions or explanations, require additional cognitive activity that often leads to reactivity and invalid reports. Finally, a new proposal is sketched for how the generation of introspective reports might be incorporated within a framework for non-reactive and valid verbalization of thoughts. (shrink)