Consistency-based approaches in nonmonotonic reasoning may be expected to yield multiple sets of default conclusions for a given default theory. Reasoning about such extensions is carried out at the meta-level. In this paper, we show how such reasoning may be carried out at the object level for a large class of default theories. Essentially we show how one can translate a default theory Δ, obtaining a second Δ', such that Δ has a single extension that encodes every extension of _. (...) Moreover, our translated theory is only a constant factor larger than the original. We prove that our translation behaves correctly. In the approach we can now encode the notion of extension from within the framework of standard default logic. Hence one can encode notions such as skeptical and credulous conclusions, and can reason about such conclusions within a single extension. This result has some theoretical interest, in that it shows how multiple extensions of semi-monotonic default theories are encodable with manageable overhead in a single extension. (shrink)

ABSTRACT Reiter's default logic is one of the most prominent and well-studied approaches to nonmonotonic reasoning. Its evolution has resulted in diverse variants enjoying many interesting properties. This process however seems to be diverging because it has led to default logics that are difficult to compare due to different formal characterizations—sometimes even dealing with different objects of discourse. This problem is addressed in this paper in two ways. One the one hand, we elaborate on the relationships between different types of (...) default logics and discuss their differences wrt some basic properties. In particular, we show how two recently proposed variants, namely rational and CA-default logic, are related to each other and existing default logics. As an interesting byproduct, we obtain a cumulative counterpart to Lukasiewicz' variant of default logic. The resulting system is insofar surprising since it necessitates to refine the canonical way of assuring cumulativity in default logics. On the other hand, we pursue an integrating approach. We give a translation embedding rational and CA-default logic into a recently developed framework for default logics. This allows us not only to classify these variants, but it moreover provides us with semantical underpinnings that have been lacking so far. (shrink)

1. Reasoning about action and change, or more generally reasoning about dynamic systems, is not only central to knowledge representation and reasoning but at the heart of computer science (Fisher e...

This paper offers an explanation of how philosophy of science in the second half of the 20th century came to be so conspicuously silent on the problem of how to explain the applicability of mathematics. It examines the idea of the early logicists that the analyticity of mathematics accounts for its applicability, and how this idea was transformed during Carnap's efforts to establish a consistent and substantial philosophy of mathematics within the larger framework of Logical Empiricism. I argue that at (...) the end point of this development, philosophical discussion of the applicability problem was terminated although important aspects of the logicists' original response to the applicability problem had had to be sacrificed along the way. (shrink)

Epistemic trust is crucial for science. This article aims to identify the kinds of assumptions that are involved in epistemic trust as it is required for the successful operation of science as a collective epistemic enterprise. The relevant kind of reliance should involve working from the assumption that the epistemic endeavors of others are appropriately geared towards the truth, but the exact content of this assumption is more difficult to analyze than it might appear. The root of the problem is (...) that methodological decisions in science typically involve a complex trade-off between the reliability of positive results, the reliability of negative results, and the investigation's power. Which balance between these is the ‘correct’ one can only be determined in light of an evaluation of the consequences of all the different possible outcomes of the inquiry. What it means for the investigation to be ‘appropriately geared towards the truth’ thus depends on certain value judgments. I conclude that in the optimal case, trusting someone in her capacity as an information provider also involves a reliance on her having the right attitude towards the possible consequences of her epistemic work. 1 Introduction2 Epistemic Reliance within the Sciences3 Methodological Conventionalism4 Trust in Science5 Conclusions. (shrink)

When interests and preferences of researchers or their sponsors cause bias in experimental design, data interpretation or dissemination of research results, we normally think of it as an epistemic shortcoming. But as a result of the debate on science and values, the idea that all extra-scientific influences on research could be singled out and separated from pure science is now widely believed to be an illusion. I argue that nonetheless, there are cases in which research is rightfully regarded as epistemologically (...) deficient due to the influence of preferences on its outcomes. I present examples from biomedical research and offer an analysis in terms of social epistemology. (shrink)

This paper aims to give an insight into developments that contributed to the significance of the work of Jakob von Uexküll and stresses the importance of his occupation in Hamburg. A biographical survey pays tribute to the implication of the historical pretext and context. A scientific survey describes findings and ideas of Uexküll that proved important for the development of biology and the cognitive sciences. In addition, this paper sets out to reject the common notion that Uexküll’s concepts were ideas (...) of a purely theoretical and philosophical character. It confirms that in fact the central aims of his work were to sustain the empirical method in biology and to give biology a sound epistemological basis. Some examples show how historical and theoretical developments converged at Uexküll’s Institut für Umweltforschung in Hamburg and ignited a productive research activity. (shrink)

This chapter provides an analysis of the long process of introducing an electronic identity for online authentication in Germany. This process is described as a multi-facet innovation, involving actors from different policy fields shifting over time. The eID process started in the late ‘90s in the context of eGovernment and eCommerce with the legislation on e-signatures, which were supposed to allow for online authentication of citizens. When after 5 years it was recognized that this was not the case, a new (...) digital ID card, which had meanwhile been announced, was chosen as token for the eID. This process was dominated by the concerns for visual inspection and border control, including the storage of digital fingerprints. Under the leadership of the Ministry of the Interior (BMI) and technical guidance of the Federal Agency for Information Security (BSI), technical specifications have to a large extent been adopted from the electronic passport, which had been smoothly introduced 2 years before. However, in the legislative process some concern regarding digital fingerprints on the eID card was raised and led to an opt-in solution. In 2009, a bill on the new ID card was passed which regulates the eID function for online authentication as well. This is characterized as a radical innovation by introducing a double-sided, mutual authentication of the citizen and the service provider and implementing the principle of proportionality regarding the access of service providers to data on the chip. At the time of writing, field tests are conducted. Roll-out of the new eID card is to start in November 2010. Therefore no figures about adoption can be provided here. (shrink)

This article argues for the reassessment of Indrabhuti’s Jnanasiddhi in the light of newly discovered primary witnesses and previously unnoticed relations to other works. Presumably composed in the late eighth to early ninth century CE, it belongs to the earlier phase of Tantric Buddhism, a transitional period between the predominance of the Yoga- and Mahayogatantras to the later Yoginitantras, and relates to a variety of important scriptures of this formation. While this article briefly discusses the origins, authorship, contents and context (...) of the Jnanasiddhi, including a brief overview of its modern scholarship, it also highlights its intertextual relations with and notable influences upon other tantric works of major importance. The Jnanasiddhi stands out as a tantric scripture of paramount importance, and we attempt to demonstrate the necessity of its reassessment with recourse to hitherto neglected but nonetheless vital sources that have only recently come to light. (shrink)

Elements of Folk Psychology; Outline of a Psychological History of the Development of Mankind, has been considered important throughout the human history, and so that this work is never forgotten we have made efforts in its preservation by republishing this book in a modern format for present and future generations. This whole book has been reformatted, retyped and designed. These books are not made of scanned copies of their original work and hence the text is clear and readable.

In recent years, a variety of philosophers have argued that the fundamental bearers of representational properties like truth are concrete particulars produced by cognitive agents—representational vehicles (“RVs”), as I will call them. This view apparently conflicts with other judgments that are part of our common sense understanding of truth. For instance, it is plausible that there are truths about the Milky Way that have and never will never be articulated by anyone. Whatever these truths are, it looks like they cannot (...) be RVs, because an RV is articulated just in case it exists. In this paper, I argue that it is consistent to hold that the fundamental truth-bearers are representational vehicles, while also acknowledging the existence of unarticulated truths. I argue that truth is a property that derivatively holds of kinds of RVs, that these provide the basis for our judgments that there are unarticulated truths, and I defend the view against putative counter-examples. (shrink)

To study how religiosity affects family business goals, we merge literatures on goal setting, temporal orientation, and family business to argue that family business goals can be distinguished into short-term and long-term orientations and propose that religiosity affects both orientations, but to varying degrees. Drawing on a sample of private U.S. family businesses and applying partial least squares structural equations modeling, we find tentative support that religiosity has a stronger positive effect on long-term goal orientation than on short-term goal orientation. (...) We discuss implications for theory development and future research involving religiosity and family business goals. (shrink)

To study how religiosity affects family business goals, we merge literatures on goal setting, temporal orientation, and family business to argue that family business goals can be distinguished into short-term and long-term orientations and propose that religiosity affects both orientations, but to varying degrees. Drawing on a sample of private U.S. family businesses and applying partial least squares structural equations modeling, we find tentative support that religiosity has a stronger positive effect on long-term goal orientation than on short-term goal orientation. (...) We discuss implications for theory development and future research involving religiosity and family business goals. (shrink)

Goldstein and Gigerenzer (2002) [Models of ecological rationality: The recognition heuristic. Psychological Review, 109 (1), 75–90] found evidence for the use of the recognition heuristic. For example, if an individual recognizes only one of two cities, they tend to infer that the recognized city has a larger population. A prediction that follows is that of the less‐is‐more effect: Recognizing fewer cities leads, under certain conditions, to more accurate inferences than recognizing more cities. We extend the recognition heuristic to group decision‐making (...) by developing majority and lexicographic models of how recognition information is used by groups. We formally show when the less‐is‐more effect is predicted in groups and we present a study where three‐member groups performed the population comparison task. Several aspects of our data indicate that members who can use the recognition heuristic are, not in all but in most cases, more influential in the group decision process than members who cannot use the heuristic. We also observed the less‐is‐more effect and found that models assuming that members who can use the recognition heuristic are more influential better predict when the effect occurs. (shrink)

This paper aims to give an insight into developments that contributed to the significance of the work of Jakob von Uexküll and stresses the importance of his occupation in Hamburg. A biographical survey pays tribute to the implication of the historical pretext and context. A scientific survey describes findings and ideas of Uexküll that proved important for the development of biology and the cognitive sciences. In addition, this paper sets out to reject the common notion that Uexküll’s concepts were ideas (...) of a purely theoretical and philosophical character. It confirms that in fact the central aims of his work were to sustain the empirical method in biology and to give biology a sound epistemological basis. Some examples show how historical and theoretical developments converged at Uexküll’s Institut für Umweltforschung in Hamburg and ignited a productive research activity. (shrink)

This paper advocates for making epistemic interests a central object of philosophical analysis in epistemology and philosophy of science. It is argued that the importance of epistemic interests derives from their fundamental importance for the notion of objectivity. Epistemic interests are defined as individuated by a set of objectives, each of which represents a dimension of the search for truth. Among these dimensions, specificity, sensitivity, and productivity are discussed in detail. It is argued that the relevance of productivity is often (...) overlooked in debates about the ends and means of science. A definition of the objectivity of inquiry is proposed that takes the notion of epistemic interest as its starting point. (shrink)

This article gives a brief introduction to the MacArthur Competence Assessment Tool-Treatment (MacCAT-T) and critically examines its theoretical presuppositions. On the basis of empirical, methodological and ethical critique it is emphasised that the cognitive bias that underlies the MacCAT-T assessment needs to be modified. On the one hand it has to be admitted that the operationalisation of competence in terms of value-free categories, e.g. rational decision abilities, guarantees objectivity to a great extent; but on the other hand it bears severe (...) problems. Firstly, the cognitive focus is in itself a normative convention in the process of anthropological value-attribution. Secondly, it misses the complexity of the decision process in real life. It is therefore suggested that values, emotions and other biographic and context specific aspects should be considered when interpreting the cognitive standards according to the MacArthur model. To fill the gap between cognitive and non-cognitive approaches the phenomenological theory of personal constructs is briefly introduced. In conclusion some main demands for further research to develop a multi-step model of competence assessment are outlined. (shrink)

As nation-states make greater efforts to regulate the flow of people on the move—refugees, economic migrants, and international travelers alike—advocates of DNA profiling technologies claim DNA testing provides a reliable and objective way of revealing a person’s true identity for immigration procedures. This article examines the use of DNA testing for family reunification in immigration cases in Finland, Germany, and the United States—the first transatlantic analysis of such cases—to explore the relationship between technology, the meaning of family, and immigration. Drawing (...) on our analyses of archival records, government documents, and interviews with immigration stakeholders, we argue that DNA testing is not conclusive about the meaning of family. While the technology may facilitate decision making for both would-be immigrants and state officials, our study shows hesitancy among the latter to let DNA testing make the final determination. We introduce the concept of social validity—whether the interpretation of test results matches social or political meanings in a given local context—in order to make sense of the complexities and challenges of DNA testing in practice. We show that DNA testing is not just a technology of belonging or a way to claim citizenship rights. It may also enable exclusion and denial of rights. (shrink)

This guest editorial opens with a brief overview of the transformations of medicine and mental health that can be observed since the second half of the twentieth century. New genetics and biotechnologies hold out the promise of overcoming presumed limitations in the field of mental health care, that is, the fact that diagnostic procedures in psychiatry and clinical psychology still largely rely on the narratives of patients and questionnaires, supposedly subjective assessments by physicians and psychologists. It is envisioned that innovative (...) genetic and proteomic tools, imaging technologies, and objective laboratory tests for blood biomarkers will enable better diagnosis and treatment of mental diseases. We argue that emerging biotechnologies do not revolutionize mental health, despite their promise to do so. Instead, we observe a pluralization of research and treatment approaches in the domain of mental health. The second part of this editorial discusses the contributions to this special issue on emerging biotechnologies and mental health and outlines how they address some of the gaps in social studies of psychiatry and mental health in the twenty-first century. (shrink)

A common complaint against the increasing privatization of research is that research that is conducted with the immediate purpose of producing applicable knowledge will not yield knowledge as valuable as that generated in more curiosity‐driven, academic settings. In this paper, I make this concern precise and reconstruct the rationale behind it. Subsequently, I examine the case of industry research on the giant magnetoresistance effect in the 1990s as a characteristic example of research undertaken under considerable pressure to produce applicable results. (...) The example permits one to arrive at a more optimistic assessment of the epistemic merits of private, application‐driven research. I attempt to specify the conditions that, in this case, advanced the production of interesting and reliable knowledge. (shrink)

This paper aims to give an insight into developments that contributed to the significance of the work of Jakob von Uexküll and stresses the importance of his occupation in Hamburg. A biographical survey pays tribute to the implication of the historical pretext and context. A scientific survey describes findings and ideas of Uexküll that proved important for the development of biology and the cognitive sciences. In addition, this paper sets out to reject the common notion that Uexküll’s concepts were ideas (...) of a purely theoretical and philosophical character. It confirms that in fact the central aims of his work were to sustain the empirical method in biology and to give biology a sound epistemological basis. Some examples show how historical and theoretical developments converged at Uexküll’s Institut für Umweltforschung in Hamburg and ignited a productive research activity. (shrink)