A consensus in a scientific community is often used as a resource for making informed public-policy decisions and deciding between rival expert testimonies in legal trials. This paper contains a social-epistemic analysis of the high-profile Bendectin drug controversy, which was decided in the courtroom inter alia by deference to a scientific consensus about the safety of Bendectin. Drawing on my previously developed account of knowledge-based consensus, I argue that the consensus in this case was not knowledge based, hence courts’ deference (...) to it was not epistemically justified. I draw sceptical lessons from this analysis regarding the value of scientific consensus as a desirable and reliable means of resolving scientific controversies in public life. (shrink)

While courts depend on expert opinions in reaching sound judgments, the role of the expert witness in legal proceedings is associated with a litany of problems. Perhaps most prevalent is the question of under what circumstances should testimony be admitted as expert opinion. We review the changing policies adopted by American courts in an attempt to ensure the reliability and usefulness of the scientific and technical information admitted as evidence. We argue that these admissibility criteria are best seen in a (...) dialectical context as a set of critical questions of the kind commonly used in models of argumentation. (shrink)

We offer a formal treatment of the semantics of both complete and incomplete mistrustful or distrustful information transmissions. The semantics of such relations is analysed in view of rules that define the behaviour of a receiving agent. We justify this approach in view of human agent communications and secure system design. We further specify some properties of such relations.

Tribunals have come to depend increasingly on expertise for determining the facts in cases. However, current legal methods have proved problematic to work with. This paper argues that, as a special model of public understanding of science, assessing expertise should consider source credibility of expertise from internal aspects, including scientific validity and reliability, and external aspects involving the credibility of experts. Using the Carneades Argumentation System we show that the internal and the external aspects are mediated by the structure of (...) the argument from expert opinion with its matching set of critical questions. (shrink)

The article addresses three theses on judgment in general and legal judgment in particular, starting from Peirce’s and Dewey’s claims about them. The first thesis, ontological, concerns the content of an act of judgment and says that judgment is about an object instantiating a property (not about a property instantiated by an object). The second, alethic, concerns the relation between judgment and truth and says that judgment is the attribution of a truth value to a proposition. The third, genetic, deals (...) with the moments of judgment claiming it is a process susceptible of being articulated in such moments. Its fundamental moments are 1) hypothesis, 2) inquiry, 3) result. The article claims that the three theses interconnect and hold for both judgment in general and legal judgment, given that the latter is a model of the former; so a complex conception of judgment is articulated, discussing also its relations with assertion and inference. (shrink)

Le code italien de déontologie de l’avocat impose à ce dernier, outre un devoir général de probité, un devoir de vérité dans le procès. Ce travail analyse la portée de ce devoir et soutient qu’il revient plutôt à l’interdiction du mensonge et au devoir de faire des assertions justifiées par les preuves disponibles. Cela ne signifie pas cependant que la vérité ne joue aucun rôle dans le procès. En effet, d’une part, les assertions en justice soulèvent une prétention de vérité, (...) fondée sur une conception de la vérité comme correspondance, et, d’autre part, les apports des avocats et des parties, notamment à travers les procédures contradictoires, permettent de découvrir la vérité sur les faits pertinents. (shrink)