Hohfeld’s analysis on the different types of rights and duties is highly influential in analytical legal theory, and it is considered as a fundamental theory in AI&Law and normative multi-agent systems. Yet a century later, the formalization of this theory remains, in various ways, unresolved. In this paper I provide a formal analysis of how the working of a system containing Hohfeldian rights and duties can be delineated. This formalization starts from using the same tools as the classical ones by (...) Kanger and Lindahl used, but instead of focusing on the algebraic features of rights and duties, it aims at providing a comprehensive analysis of what these rights and duties actually are and how they behave and at saying something substantial on Power too—maintaining all along the Hohfeldian intentions that these rights and duties are sui generis and inherently relational. (shrink)

This paper arose out of the 2017 international conference on AI and law doctoral consortium. There were five students who presented their Ph.D. work, and each of them has contributed a section to this paper. The paper offers a view of what topics are currently engaging students, and shows the diversity of their interests and influences.

This comprehensive volume features the proceedings of the Third International Workshop on Logics for New-Generation Artificial Intelligence and the International Workshop on Logic, AI and Law, held in Hangzhou, China on September 8-9 and 11-12, 2023. The collection offers a diverse range of papers that explore the intersection of logic, artificial intelligence, and law. With contributions from some of the leading experts in the field, this volume provides insights into the latest research and developments in the applications of logic in (...) these areas. It is an essential resource for researchers, practitioners, and students interested in the latest advancements in logic and its applications to artificial intelligence and law. (shrink)

The formal analysis of normative systems has traditionally focused on their deontic dimension rather than on their potestative dimension; yet, a growing amount of works aims at shedding light on the notion of power, its norm changing potential and its general interactions with deontic concepts. The present article contributes to this line of inquiry by adopting the following perspective: a normative system can be metaphorically seen as an agent that allocates abilities (powers) in order to promote the fulfillment of certain (...) desires (deontic directives), and in doing so regulates its behavioural domain. Our analysis emphasizes the instrumental nature of power, while clarifying the distinction between ‘being allowed’ and ‘being enabled’ and unveiling new patterns of interaction between deontic and potestative concepts. Operationally, we formulate this framework in terms of conditional rules, and provide a corresponding logic programming (ASP) implementation. (shrink)