Traditionally one main emphasis of the quantum mechanical measurement theory is on the question how the pure state of the compound system 'measured system + measuring apparatus' is transformed into the 'mixture' of all possible results of that measurement, weighted with their probability: the so-called “disappearance of the interference terms”. It is argued in this note that in reality there is no such transformation, so that there is no need to account for such a transformation theoretically. _German_ Gewöhnlich liegt ein (...) Hauptgewicht der quantenmechanischen Messtheorie auf der Frage des Übergangs vom,reinen Fall' des Gesamtsystems,gemessenes System + Messgerät' in das,Gemenge' aus allen möglichen Messergebnissen, gewichtet mit ihren Wahrscheinlichkeiten: Das sog.,,Verschwinden der Interferenzterme“. In dieser Notiz wird die Meinung vertreten, dass es einen solchen Übergang faktisch nicht gibt, so dass es nicht notwendig ist, eine theoretische Erklärung für den Übergang zu geben. (shrink)

The essay revisits the puzzle of the ‘passage’ of time in relation to EPR-type measurements and asks what philosophical consequences can be drawn from them. Some argue that the lack of invariance of temporal order in the measurement of a space-like related EPR pair, under relativistic motion, casts serious doubts on the ‘reality’ of the lapse of time. Others argue thatcertain features of quantum mechanics establisha tensed theory of time – understood here as Possibilism or the growing block universe. The (...) paper analyzes the employment of frame-invariant entropic clocks in a relativistic setting and argues that tenselessness does not imply timelessness. But this conclusion does not support a tensed theory of time, which requires a preferred foliation. It is argued that the only reliable inference from the EPR example and the use of entropic clocks is an inference not just to a Leibnizian order of the succession of events but a frame-invariant order according to some selected clocks. (shrink)

Bernard Bolzano développe une théorie exhaustive et très élaborée des propositions comme entités structurées et composées de concepts. L’une de ses thèses principales consiste à dire que toutes les propositions ont en commun la même structure : « A – a – b ». Cet article examine le rôle que jouent les propriétés eu égard à cette thèse. Lorsque les propriétés figurent dans les théories sémantiques standards, elles sont généralement conçues comme des entités partageables, en d’autres mots, comme des universaux. (...) Je montre que Bolzano croyait que ce sont bien plutôt des propriétés particularisées qui tombent sous la représentation-prédicat d’une proposition. De là émerge une sémantique plutôt inhabituelle : une proposition de la forme [A – a – b] est vraie ssi une des propriétés particularisées qui se tiennent sous la représentation-prédicat [b] inhère au sujet de la proposition, c’est-à-dire l’entité dénotée par la représentation-sujet [A].Bernard Bolzano developed a highly elaborate and comprising account of propositions as structured entities composed of concepts. One of his main contentions was that all propositions share a common structure : “A – has – b”. The main part of my paper is a discussion of the role which properties play for this thesis and thus in Bolzano’s semantics. Where properties feature as semantic values in standard semantic theories they are conceived of as shareable entities, in other words, as universals. I show that it is particularised properties which Bolzano thought to be the entities standing under the predicate-ideas of propositions. With this idea, a rather uncommon semantic arises : a proposition of the form [A – has – b] will be true iff one of the particularised properties standing under the predicate-idea [b] inheres in the subject of the proposition, i.e. in the entity denoted by the subject-idea [A]. (shrink)

Im folgenden Diskussionsbeitrag werden zunächst starke Spannungen innerhalb von Bolzanos Ausführungen zum Substanzbegriff aufgezeigt. Sodann wird eine kürzlich vorgeschlagene Bolzano-Interpretation besprochen, die geeignet sein soll, besagte Spannungen auszuräumen. Doch der Vorschlag bleibt unbefriedigend; daher wird im Anschluss eine alternative Interpretation ausgeführt und verteidigt.

Many friends of the category of particularised qualities subscribe to the view that particularised qualities have a unique bearer in which they inhere; no such quality then can inhere in two different entities. But it seems that this idea is flawed, for there are apparent counterexamples. An apple’s redness is identical with the redness of its skin, though the apple is distinct from its skin. So it seems that a principle of beareruniqueness has to be modified, maybe by excluding certain (...) unwanted cases. (shrink)