Using astrology as a case study, this paper attempts to establish a criterion for demarcating science from pseudoscience. Numerous reasons for considering astrology to be a pseudoscience are evaluated and rejected; verifiability and falsifiability are briefly discussed. A theory is said to be pseudoscientific if and only if (1) it has been less progressive than alternative theories over a long period of time, and faces many unsolved problems, but (2) the community of practitioners makes little attempt to develop the theory (...) towards solutions of the problems, shows no concern for attempts to evaluate the theory in relation to others, and is selective in considering confirmations and disconfirmations. This criterion has the interesting consequence that a theory can be scientific at one time but pseudoscientific at another. (shrink)

This paper considers objections to Popper's views on scientific method. It is argued that criticism of Popper's views, developed by Kuhn, Feyerabend, and Lakatos, are not too damaging, although they do require that Popper's views be modified somewhat. It is argued that a much more serious criticism is that Popper has failed to provide us with any reason for holding that the methodological rules he advocates give us a better hope of realizing the aims of science than any other set (...) of rules. Consequently, Popper cannot adequately explain why we should value scientific theories more than other sorts of theories ; which in turn means that Popper fails to solve adequately his fundamental problem, namely the problem of demarcation. It is suggested that in order to get around this difficulty we need to take the search for explanations as a fundamental aim of science. (shrink)

In this article I review attempts to define the term “ad hoc hypothesis,” focusing on the efforts of, among others, Karl Popper, Jarrett Leplin, and Gerald Holton. I conclude that the term is unhelpful; what is “ad hoc” seems to be a judgment made by particular scientists not on the basis of any well-established definition but rather on their individual aesthetic senses. Further, a hypothesis considered ad hoc can apparently be retroactively declared non–ad hoc on the basis of subsequent data, (...) rendering the term meaningless. (shrink)

Studie pojednává o analýze a navrhovaném řešení problému „hodnotové neutrality" vědy německým kritickým racionalistou Hansem Albertem. Především Albert odmítá dvě vyhrocené pozice: novopozitivistickou ignoraci hodnotících soudů i jejich existencialistickou adoraci. Naopak se prostřednictvím takzvaných přemosťovacích principů snaží překlenout propast mezi poznáním na jedné straně a rozhodnutím na straně druhé. V návaznosti na Maxe Webera uznává princip hodnotové neutrality ve vědě, ovšem pouze v oblasti jejího objektového jazyka, neboť věda jako technologický systém výpovědí má pouze informativní, nikoli normativní charakter. To však (...) nevylučuje hodnocení v rovině předmětů věd a v rovině hodnotové báze věd. Dále se tato studie věnuje otázce hodnoty vědy o sobě a nakonec krátkému seznámení s Albertovým pojetím kritického racionalismu jako návrhu „způsobu života". (shrink)