In this paper first order theories for nonmonotone inductive definitions are introduced, and a proof-theoretic analysis for such theories based on combined operator forms a la Richter with recursively inaccessible and Mahlo closure ordinals is given.

A new approach to Hume's problem of induction that justifies the optimality of induction at the level of meta-induction. Hume's problem of justifying induction has been among epistemology's greatest challenges for centuries. In this book, Gerhard Schurz proposes a new approach to Hume's problem. Acknowledging the force of Hume's arguments against the possibility of a noncircular justification of the reliability of induction, Schurz demonstrates instead the possibility of a noncircular justification of the optimality of induction, or, more precisely, of (...) meta-induction (the application of induction to competing prediction models). Drawing on discoveries in computational learning theory, Schurz demonstrates that a regret-based learning strategy, attractivity-weighted meta-induction, is predictively optimal in all possible worlds among all prediction methods accessible to the epistemic agent. Moreover, the a priori justification of meta-induction generates a noncircular a posteriori justification of object induction. Taken together, these two results provide a noncircular solution to Hume's problem. Schurz discusses the philosophical debate on the problem of induction, addressing all major attempts at a solution to Hume's problem and describing their shortcomings; presents a series of theorems, accompanied by a description of computer simulations illustrating the content of these theorems (with proofs presented in a mathematical appendix); and defends, refines, and applies core insights regarding the optimality of meta-induction, explaining applications in neighboring disciplines including forecasting sciences, cognitive science, social epistemology, and generalized evolution theory. Finally, Schurz generalizes the method of optimality-based justification to a new strategy of justification in epistemology, arguing that optimality justifications can avoid the problems of justificatory circularity and regress. (shrink)

Nonmonotonic reasoning in its broadest sense is reasoning to conclusions on the basis of incomplete information. Given more information, previously drawn inferences may be retracted. Commonsense reasoning has a nonmonotonic component; it has been argued that almost all commonsense inferences are of this sort. From the end of the 1980s to the present there has been an explosion in research in nonmonotonic reasoning. It is now possible to understand more clearly the properties of the major formalisms from a metatheoretical point (...) of view, the relationships among the formalisms and their connection to independently developed proof methods. The goal of this monograph is to make this understanding more accessible. (shrink)

Einleitung. Die stellung des parlamentes und sein verhältnis zum individuum.--Die moderne demokratie und der gleichheitzbegriff.--Die gleichheit vor dem gesetz.--Das problem der gleichheit der staaten im bundesstaatsrect.

The constraint against harming people in order to save yourself and others seems stronger than the constraint against harming people as a consequence of saving yourself and others. The reduced constraint against acting in one type of case is often justified with reference to the intentions of the agent or to the fact that she does not use the people she harms as a means. In this article I offer a victim-centered account. I argue that the circumstances in which the (...) people to be harmed find themselves are significant in distinguishing morally between two instances of harming. (shrink)

This paper elaborates on the following correspondence theorem (which has been defended and formally proved elsewhere): if theory T has been empirically successful in a domain of applications A, but was superseded later on by a different theory T* which was likewise successful in A, then under natural conditions T contains theoretical expressions which were responsible for T’s success and correspond (in A) to certain theoretical expressions of T*. I illustrate this theorem at hand of the phlogiston versus oxygen theories (...) of combustion, and the classical versus relativistic theories of mass. The ontological consequences of the theorem are worked out in terms of the indirect reference and partial truth. The final section explains how the correspondence theorem may justify a weak version of scientific realism without presupposing the no-miracles argument. (shrink)

Together with its introduction, Language, Mind and Epistemology examines Davidson's unified stance towards philosophy by joining American and European authors ...

In the first part of my paper I discuss eight arguments in favour of the theory-dependence of observation: realistic content, guidance function of theories, perception as cognitive construction, expectation-dependence of perception, theory-dependence of scientific data, continuity between observational and theoretical concepts, language-dependence, and meaning holism. I argue that although these arguments make correct points, they do not exclude the existence of observations that are weakly theory-neutral in the sense that they don’t depend on acquired background knowledge. In the second part (...) I suggest an experimental method, the method of ostensive learning experiments, by which the degree of theory- and language-independence of a concept can be tested. (shrink)

This edited volume offers a new approach to understanding social conventions by way of Martin Heidegger. It connects the philosopher's conceptions of the anyone, everydayness, and authenticity with an analysis and critique of social normativity. Heidegger’s account of the anyone is ambiguous. Some see it as a good description of human sociality, others think of it as an important critique of modern mass society. This volume seeks to understand this ambiguity as reflecting the tension between the constitutive function of conventions (...) for human action and the critical aspects of conformism. It argues that Heidegger’s anyone should neither be reduced to its pejorative nor its constitutive dimension. Rather, the concept could show how power and norms function. This volume would be of interest to scholars and students of philosophy and the social sciences who wish to investigate the social applications of the works of Martin Heidegger. (shrink)

According to a plausible picture of information, to acquire information is to rule out possibilities. What is the nature of these possibilities? The most natural answer---that they are possible states of the world---seems to be refuted by the existence of informative truths that are necessary, and so don't rule out any real possibilities. This seems to show that informational contents cannot be identified with the real possibilities they eliminate. Real possibilities, it seems, are too coarse-grained to do the work of (...) informational contents. ;In the first part of the dissertation, I look at two defenses of the coarse-grained conception of content. First, Stalnaker has claimed that the informativeness of necessary truths can be explained within a two-dimensional semantic framework, in which necessary truths have contingent metalinguistic contents. In Chapter 1, I argue that this metalinguistic approach misconstrues the content of mathematical truths. Second, Stalnaker has claimed that we have independent reason to adopt a coarse-grained conception of content since naturalistic views of content such as indicator views allow only for coarse-grained contents. In Chapter 2, I argue that both indicator and teleological views allow for more fine-grained contents and that, given certain assumptions, they even require them. Together, these arguments show that the best attempt to explain the informativeness of necessary truths in terms of coarse-grained entities fails, and that naturalism gives us no reason for thinking that some other attempt will succeed. Instead of explaining informativeness in terms of the elimination of real possibilities, I claim, we should explain it in terms of the elimination of more fine-grained epistemic possibilities. ;In the second part of the dissertation, I describe the characteristic features of epistemic possibilities. Chapter 3 clarifies the relevant sense of epistemic possibility by distinguishing it from related senses that have gone under the same name. I argue that P is epistemically possible for a thinker at a time just in case an operative belief that P is compatible with his operative beliefs at this time, where beliefs are called compatible, not if their contents are compatible, but if the beliefs themselves are compatible in the sense that it is possible to have them at the same time. Since epistemic possibility in this sense is a matter of what it is possible to believe, I call it epistemic possibility in the believability sense. ;In Chapter 4, I turn to the question of what sort of thing epistemic possibilities are. I argue that epistemic possibilities can be defined in terms of, but not identified with, a certain kind of fine-grained content. (shrink)

How does your information change when you learn that something might be the case, where the modal “might” is epistemic? On the orthodox view, a proposition is added to your information base; on the view defended here, no propositions are added to your information base but some are removed from it. I argue that Stephen Yablo’s recent attempt to define this removal operation as a kind of propositional subtraction fails, offer a definition of my own in terms of the part–whole (...) relations between the truthmakers of the propositions one accepts, and argue that a deontic analogue of this account solves a problem about permission posed long ago by David Lewis. (shrink)

Seit 1923 erscheinen in der Sammlung Tusculum ma gebende Editionen griechischer und lateinischer Werke mit deutscher bersetzung. Die Originaltexte werden zudem eingeleitet und umfassend kommentiert; nach der neuen Konzeption bieten schlie lich thematische Essays tiefere Einblicke in das Werk, seinen historischen Kontext und sein Nachleben. Die hohe wissenschaftliche Qualit t der Ausgaben, gepaart mit dem leserfreundlichen Sprachstil der Einf hrungs- und Kommentarteile, macht jeden Tusculum-Band zu einer fundamentalen Lekt re nicht nur f r Studierende, die sich zum ersten Mal einem (...) antiken Autor n hern, und f r Wissenschaftler, die spezifische Aspekte eines Werkes vertiefen m chten, sondern f r alle, die sich durch vertrauensw rdige bersetzungen einen Zugang zur Antiken Welt verschaffen wollen. In der Reihe wurden bisher ber 270 Titel publiziert, alle erh ltlich als Buch und eBook. Dadruch werden bislang vergriffene Titel und Rarit ten wieder vollst ndig verf gbar gemacht. Zus tzlich zu der Buchreihe erscheint bei De Gruyter zum 90-j hrigen Jubil um das eBook-PaketTusculum Online, eine digitale Sammlung aller von 1923 bis 2013 erschienenen Titel -eine geb hrende W rdigung eines wichtigen St cks deutscher Verlagsgeschichte. Mehr Informationen rund um Tusculum erhalten Sie unter: www.degruyter.com/tusculum. (shrink)

In the contemporary research on cooperation we find mathematical, game-, moral-theoretical, experimental and ethological investigations. These approaches are individualistic in principle. Raimo Tuomela introduces a correction of the conceptualization of the standard game theory because this proposal lacks an account of collective commitments and acting for a reason, we need for explaining many cases. The essay sketches Tuomela’s proposal with regard to his new turn of analyzing cooperation. A substantial problem in social theory emerges from this framework understanding the social. (...) The questtion is whether there is something like a basic consensus in social systems or a normative notion of collective commitments. This leads us to a re-interpretation of the function of social norms, I will sketch. (shrink)