I argue that scientific progress is precisely the accumulation of scientific knowledge.

This volume collects reflections on the role of philosophy in case studies in the history of science. Case studies have played a prominent role in recent history and philosophy of science. They have been used to illustrate, question, explore, or explicate philosophical points of view. Even if not explicitly so, historical narratives are always guided by philosophical background assumptions. But what happens if different philosophies lead to different narratives of the same historical episodes? Can historical case studies decide between competing (...) philosophical viewpoints? What are the criteria that a case study has to fulfill in order to be philosophically relevant? Bringing together leading practitioners in the fields of history and philosophy of the physical and the life sciences, this volume addresses this methodological problem and proposes ways of rendering explicit philosophical assumptions of historical work. (shrink)

According to the foundationalist picture, shared by many rationalists and positivist empiricists, science makes cognitive progress by accumulating justified truths. Fallibilists, who point out that complete certainty cannot be achieved in empirical science, can still argue that even successions of false theories may progress toward the truth. This proposal was supported by Karl Popper with his notion of truthlikeness or verisimilitude. Popper’s own technical definition failed, but the idea that scientific progress means increasing truthlikeness can be expressed by defining degrees (...) of truthlikeness in terms of similarities between states of affairs. This paper defends the verisimilitude approach against Alexander Bird who argues that the “semantic” definition is not sufficient to define progress, but the “epistemic” definition referring to justification and knowledge is more adequate. Here Bird ignores the crucial distinction between real progress and estimated progress, explicated by the difference between absolute degrees of truthlikeness and their evidence-relative expected values. Further, it is argued that Bird’s idea of returning to the cumulative model of growth requires an implausible trick of transforming past false theories into true ones. (shrink)

This chapter presents and criticizes the two dominant accounts of thought experiments in science, due to James Robert Brown and John Norton; the mechanical thought experiment of Simon Stevin is used as an exemplar. The chapter argues that scientific thought experiments are strongly analogous to their ‘real’, actual physical, counterparts. In each kind of experiment, theoretical context affects which arguments are generated and/or thought to be sustainable on the basis of the states of affairs involved. The difference is whether the (...) states of affairs are hypothetical and/or counterfactual rather than actual. This view is consistent with empiricism concerning scientific thought experiments. On such empiricism, the arguments that it is possible to pump from thought experiments have premises grounded in experience, rather than an additional faculty. (shrink)