The ArgumentThe purpose of this article is twofold. Firstly, I propose to analyze controversies using a “dialectical” model, in the sense described in Aristotle'sTopics. This approach presupposes that we temporarily disregard, for the sake of clarity, the concreteness of real life controversies in order to focus on their argumentative structure. From this point of view, the main advantage of controversies is that they allow the interlocutorsto testeach other's claims and therefore to arrive at relatively corroborated conclusions. This testing function in (...) a dialectical context is implemented through theassentto commonly accepted premises, and thenecessitywhich characterizes each step of the reasoning.Secondly, I shall apply this dialectical framework to the study of the controversy concerning the motion of the Earth, or rather a small episode of it. I shall examine an exchange of letters, written in 1616 and in 1624 respectively, between Galileo Galilei and Francesco Ingoli, one of his Aristotelian opponents. I shall then compare this exchange with the first day of Galileo'sDialogue Concerning the Two Chief Systems of the World, a fictional debate, where Galileo discusses some of the same arguments. While the first exemplifies what I call “negative” testing, and yields a refutation of the opponent's theses, the second exemplifies “positive” testing and yields a dialectical demonstration of the motion of the Earth. (shrink)

The ArgumentTwo dominant models of criticism are identified and analyzed. One is selfconsciously normative. It conceives of criticism as subject to strict logical rules. The other views itself as essentially descriptive and accounts for the critical activity in terms of social factors. In spite of their different origins and purposes, it is argued that both models share a reductionistic thrust, which minimizes the role of the critic qua agent. It is further agreed that neither provides an adequate account of critical (...) activity and its role in science. (shrink)

Our main aim is to discuss the topic of scientific controversies in the context of a recent issue that has been the centre of attention of many epistemologists though not of argumentation theorists or philosophers of science, namely the ethics of belief in face of rational disagreement. We think that the consideration of scientific examples may be of help in the epistemological debate on rational disagreement, making clear some of the deficiencies of the discussion as it has been produced until (...) now. Another central claim of our paper is that the common view according to which beliefs (and changes of beliefs) may exhibit and commonly exhibit a deontic status can be clarified in the light of Brandom’s approach to normative pragmatics and the pragmatic theories of argumentation that also have a normative character (here our example is van Eemeren’s pragma-dialectics). Our article highlights the similarities between both projects, similarities that to our knowledge were not noticed before. Finally, an important point of the article is that we need to take contextual elements into account in order to develop an adequate theory of disagreement. (shrink)

In chemistry one observes different relationships [rapports] between different bodies, which act such that they unite easily with one another. These relationships have their degrees and their laws. One observes their different insofar as, among several materials are confounded and that have some disposition to unite together, one perceives that one of these substances always unites constantly with a certain other [substance] preferably to all others.

These introductory remarks are unorthodox in many respects. The deviance from usual practice is justified by the extreme importance I attach to the subject matter of this special issue. I want to convey to the reader a sense of why I think controversies, particularly in science, are so crucial, and to propose a different way of thinking about them. This mandates, in the limited space available, a compact presentation, omitting supporting arguments and necessary elaboration — for which the reader is (...) referred to the bibliography. (shrink)