This paper describes the development of theories of scientific explanation since Hempel's earliest models in the 1940ies. It focuses on deductive and probabilistic whyexplanations and their main problems: lawlikeness, explanation-prediction asymmetries, causality, deductive and probabilistic relevance, maximal specifity and homogenity, the height of the probability value. For all of these topic the paper explains the most important approaches as well as their criticism, including the author's own accounts. Three main theses of this paper are: (1) Both deductive and probabilistic explanations (...) are important in science, not reducible to each other. (2) One must distinguish between (cause giving) explanations and (reason giving) justifications and predictions. (3) The adequacy of deductive as well as probabilistic explanations is relative to a pragmatically given background knowledge-which does not exclude, however, the possibility of purely semantic models. (shrink)

The movement known as Deutsche Physik (German physics) evolved hand in hand with National Socialism. It represented a marginal but vocal group of German scientists and science scholars who profiled themselves as defenders of “Aryan” science and called for the elimination of the “Jewish spirit” that they saw as epitomized by Albert Einstein’s relativity theory and as dominating the natural sciences, even in Nazi Germany. This infamous movement is most associated with the Nobel laureate physicists Philipp Lenard and Johannes Stark, (...) who founded it and gave it its initial political impetus during the early years of the Third Reich. However, in its main and final phase, between 1937 and 1943, the movement was no longer led by Lenard and Stark but by the philosopher of science Hugo Dingler (1881–1954) and his Munich-based circle. Tracing the development of his career until 1937, this article examines how Dingler came to play this role both despite and because of the significant differences between his and the better known Lenard-Stark strand of Deutsche Physik. Special attention is paid to Dingler’s subversive use of theoretical principles—particularly his framing of his work as a radical search for certainty—to advance the movement’s antiscientific agenda. (shrink)