Popper's critical rationalism is widely accepted under scientists and philosophers of science as a proper method for the reconstruction of scientific theories. On occasion of the application of the Popperian ideas for the reconstruction of chemistry by Akeroyd the flaws of the critical rationalist approach are criticised and a methodical alternative is proposed, involving the operational definition of scientific terms.

Abstraction and Ideation - The Semantics of chemical and biological fundamental concepts. The methods of abstraction and ideation are indispensable tools to introduce new concepts in a scientific terminology. The latter is paradigmatically introduced within the 'protophysical program' whereas abstraction is commonly applied in logics and mathematics. The application within the reconstruction of chemistry and biology causes several problems. Ideation appears to be inadequate whereas the application of abstraction necessitates a critical and minute examination of the corresponding equivalence relations. These (...) problems are solved by the introduction of the method of materially-synthetic (material-synthetische) abstraction which is exemplified by the introduction of the chemical concept of 'substance' (Stoff) and the biological concept of 'hereditary factor' (Erbanlage). (shrink)

Operationalism and theoretical entities. The thesis of the“theory ladenness” of observation leads to an antinomy. In order to solve this antinomy a technical operationalism is sketched, according to which theories should in principle not contain anything that cannot be reduced to technical procedures. This implies the rejection of Quine's underdeterminacy thesis and of many views about the theoretical-observational distinction, e.g. neopositivistic views, van Fraassen's view, Sneed-Stegmüller's view. Then I argue for the following theses: 1. All scientific concepts are theory laden (...) in the sense that they allow us to anticipate possible experiences, but they have to be in principle fully observable, i.e. integrally convertible into operational-technical applications. 2. The observation/theory distinction can be maintained as a historical one: what is observable depends on the instruments that are available at any stage of the development of science. 3.In principle theoretical entities are empirically real in Hacking's sense. However, some aspects of Hacking's realism are to be criticized. Theoretical entities are to be resolved into the totality of the interrelated properties accessible to us by means of theoretical points of view embodied in scientific instruments. (shrink)

Die Kulturwissenschaften besitzen ein Interesse an einer positiven inkompatibilistischen Antwort auf die Frage nach der Freiheit des Willens. Wäre es nicht möglich, einen gehaltvollen inkompatibilistischen Begriff von Willensfreiheit zu entwickeln, besäßen die Kulturwissenschaften einen gegenüber den Naturwissenschaften defizienten Status in dem Sinne, dass ihre hermeneutische Vorgehensweise nur provisorischen Wert hat, solange bis eine verlaufsgesetzliche Erklärung des je betreffenden menschlichen Verhaltens etabliert ist. Im Beitrag wird zunächst der Begriff der Willensfreiheit diskutiert. Im Anschluss daran wird zum einen der deterministische Versuch widerlegt, (...) die Existenz einer (inkompatibilistisch bestimmten) Freiheit des Willens zu negieren und zum anderen aber auch die übichen antideterministischen Verteidigungsversuche als unzureichend ausgewiesen. Im letzten Abschnitt wird die Willensfreiheit als die Fähigkeit verstanden, sein Handeln an (als gut bzw. besser erkannten) Gründen ausrichten zu können. (shrink)