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Three main types of subjectivist ethics are distinguished and specified by the use of elementary game-theoretical notions. It will be argued that all these theories run into difficulties that cannot be overcome within the self-imposed limits of subjectivism.

In der Diskussion metaethischer Fragen spielt das Humesche Gesetz eine wichtige Rolle, nach dem normative Aussagen, d.h. Aussagen über Gebote oder Werte, sich nicht aus deskriptiven Aussagen ableiten lassen. In dieser Arbeit wird das Gesetz präzise formuliert und bewiesen, und es wird seine Relevanz für eine Kritik naturalistischer ethischer Theorien erörtert.

To celebrate the 270th anniversary of the De Gruyter publishing house, the company is providing permanent open access to 270 selected treasures from the De Gruyter Book Archive. Titles will be made available to anyone, anywhere at any time that might be interested. The DGBA project seeks to digitize the entire backlist of titles published since 1749 to ensure that future generations have digital access to the high-quality primary sources that De Gruyter has published over the centuries.

In der Diskussion metaethischer Fragen spielt das Humesche Gesetz eine wichtige Rolle, nach dem normative Aussagen, d.h. Aussagen über Gebote oder Werte, sich nicht aus deskriptiven Aussagen ableiten lassen. In dieser Arbeit wird das Gesetz präzise formuliert und bewiesen, und es wird seine Relevanz für eine Kritik naturalistischer ethischer Theorien erörtert.

Dieses Buch ist aus diesen Vorlesungen entstanden und wendet sichprimär an Studenten. Sein Ziel ist es, ihnen das Werk Freges zu erschließen und sie zum Studium der Originaltexte anzuregen.

T × W logic is a combination of tense and modal logic for worlds or histories with the same time order. It is the basis for logics of causation, agency and conditionals, and therefore an important tool for philosophical logic. Semantically it has been defined, among others, by R. H. Thomason. Using an operator expressing truth in all worlds, first discussed by C. M. Di Maio and A. Zanardo, an axiomatization is given and its completeness proved via D. Gabbay’s irreflexivity (...) lemma. Given this lemma the proof is more or less straight forward. At the end an alternative axiomatization is sketched in which Di Maio’s and Zanardo’s operator is replaced by a version of “actually”. (shrink)

T × W logic is a combination of tense and modal logic for worlds or histories with the same time order. It is the basis for logics of causation, agency and conditionals, and therefore an important tool for philosophical logic. Semantically it has been defined, among others, by R. H. Thomason. Using an operator expressing truth in all worlds, first discussed by C. M. Di Maio and A. Zanardo, an axiomatization is given and its completeness proved via D. Gabbay’s irreflexivity (...) lemma. Given this lemma the proof is more or less straight forward. At the end an alternative axiomatization is sketched in which Di Maio’s and Zanardo’s operator is replaced by a version of “actually”. (shrink)

As cause we often specify an event the occurrence of which first guaranteed that of the effect. This notion is explicated in a framework of branching worlds in Sections I to V. VI and VII point out its close relations to the concept of an agent's bringing about an event. The topic of the last two sections is the distinction between causes and necessary circumstances. For this purpose conditionals are used, interpreted with respect to branching worlds without a similarity relation (...) between them. (shrink)

Global supervenience of beliefs about physical states of affairs on such states has strongly counter-intuitive consequences about what beliefs we can nomologically hold. This is an argument against a global supervenience of all mental properties on physical ones, and, since that is implied by strong supervenience, also against that as the preferred materialist thesis.

The Parmenides is, especially with respect to its second part, one of Plato's most difficult dialogues. The paper sketches an interpretation which is characterized by the following main points: The interpretation is neither rejectionistic nor compatibilistic, that is, according to it, neither should none of the statements of the 2nd part be taken seriously as an assertion meant to be true, nor are all statements of the 2nd part acceptable as true if correctly interpreted. In the 2nd part of the (...) Parmenides, Plato develops a logical theory - a theory of predication, participation and of the community of ideal forms in general - on mereological foundations; in doing this, he advances far beyond elementary mereological principles. This forces us to revise our views concerning the beginnings of logic. It is due to the incomparably high rank which Plato accorded to the active working-out of insights that Plato presents his results not in an expository manner, but as a web of contradictions. The readers are challenged to find the truth for themselves. (shrink)