Reasoning about causation in fact is an essential element of attributing legal responsibility. Therefore, the automation of the attribution of legal responsibility requires a modelling effort aimed at the following: a thorough understanding of the relation between the legal concepts of responsibility and of causation in fact; a thorough understanding of the relation between causation in fact and the common sense concept of causation; and, finally, the specification of an ontology of the concepts that are minimally required for (automatic) common (...) sense reasoning about causation. This article offers a worked-out example of the indicated analysis. Such example consists of: a definition of the legal concept of responsibility (in terms of liability and accountability); a definition of the legal concept of causation in fact (in terms of the initiation of physical processes by an agent and of the provision of reasons and/or opportunities to other agents); CausatiOnt, an AI-like ontology of the common sense (causal) concepts that are minimally needed for reasoning about the legal concept of causation in fact (in particular, the concepts of category, dimension, object, agent, process, event and act). (shrink)

The condition of liberty which Sen used in his famous theorem on the impossibility of the Paretian liberal was defined in terms of individual preferences. The preference-based approach has been the subject of much criticism, which led to the evolution of the game-theoretic analysis of rights. In this approach no references to individual preferences are made. Two questions are examined in this paper: how can different types of right be distinguished within a game-theoretic setting, and how do rights come into (...) existence? These questions are addressed on the basis of ideas originating from legal theory The discussion shows that an analysis of rights should take account of the whole legal system of which a legal norm forms part. Furthermore, it reveals that preferences should be re-introduced into the formal study of individual rights. (shrink)