Since the publication of Science and Values in which Laudan unveiled his “reticulated model of scientific change” (Laudan (1984)), he has published a series of articles emphasizing the naturalistic axiology inherent in this model. (Laudan (1986), (1987a), (1987b), (1989), and (forthcoming)). His epistemic naturalism makes the business of fixing rational beliefs about facts, theories, methodologies, and aims all together “cut from the same piece of empirical cloth.” Laudan’s position has numerous attractive qualities: It allows one to accept a great deal (...) of the wisdom in historicism without caving in to relativism. It allows one to accept the seemingly inevitable annexation of the theory of knowledge by the sciences and yet still maintain a normative epistemology. Finally, it awakens philosophers of science’s dogmatic slumbers regarding the axiology of scientific inquiry, and stimulates historical research into the relation between practiced means and professed ends in the sciences. (shrink)

This essay argues that Laudan et al.?s (1986,1988) project of empirically testing philosophical models of scientific change was ill?conceived, thus the data brought to light by the historians had little bearing upon the original problem: testing philosophical models of scientific change. The project is internally inconsistent and the procedure relating the theses under scrutiny to the models of change is so undefined that the corroboration or falsification of the theses teaches us nothing about the models. Serious anomalies in Laudan et (...) al.?s (1988) report of experimental results are then shown to be related to already noticed methodological difficulties. I conclude that the project fails, contrary to its authors? claim, to use historical evidence in a probative, rather than a simply illustrative, way. (shrink)

I examine the early history of quantum gravity and comment on its suitability as an episode that demands an integrated approach to history and philosophy of science.

We reflect on the nature, role and limits of non-empirical theory assessment in fundamental physics, focusing in particular on quantum gravity. We argue for the usefulness and, to some extent, necessity of non-empirical theory assessment, but also examine critically its dangers. We conclude that the principle of proliferation of theories is not only at the very root of theory assessment but all the more necessary when experimental tests are scarce, and also that, in the same situation, it represents the only (...) medicine against the degeneration of scientific research programmes. (shrink)