This paper discusses critically the fundamental elements of the Stegmüller/Sneed-reconstruction of Kuhn's normal science concept. It is argued that a) Kuhn himself cannot accept this reconstruction if he wants to describe theory dynamics in the past; b) the reconstruction is not based on a pure non-statement view; c) to have a theory in the sense of Kuhn, should be related to the ordered pair <K,Iₒ> to ensure the desired constancy over time; d) the reconstruction implies, contrary to Kuhn, the ability (...) of rejecting a theory without having an alternative one; e) the rejection of a theory can be the result of a falsifying procedure and, therefore, theories are not immune from falsification; f) the reconstruction still contains rationality gaps; g) the reconstruction shows more precisely than Kuhn's work that Popper is right when he attacks normal scientist's behaviour; h) the positions of the Kuhnians and of the criticists could be reconciled partially. (shrink)

The aim of this paper is to defend some of C. G. Hempel's basic theses concerning the logic of explanation and prediction against criticisms recently made by W. Stegmüller. It is argued (very concisely) thatthese is no need for essentially pragmatic conditions in DN-arguments;only the structural identity sub-thesis “Every adequate prediction is ... an adequate explanation” can be held instead of the one Hempel has in mind;the notion of the ambiguity of probabilistic explanations should be reformulated;there is no need for (...) more than one knowledge situation;systematizations with low inductive probability do not give rational predictions or explanations of singular events. (shrink)

Summary Directly concluded from a set of some well-known and some new conditions of adequacy, a definition of deductive-nomological explanation is given which is able to block all known anomalies, and is immune from the Eberle/Kaplan/Montague trivialization theorems. Among some other results it is further shown that law statements have to be logically equivalent to a conditional form.