Legal theory, political sciences, sociology, philosophy, logic, artificial intelligence: there are many approaches to legal argumentation. Each of them provides specific insights into highly complex phenomena. Different disciplines, but also different traditions in disciplines (e.g. analytical and continental traditions in philosophy) find here a rare occasion to meet. The present book contains contributions, both historical and thematic, from leading researchers in several of the most important approaches to legal rationality. One of the main issues is the relation between logic and law: the way logic is actually used in law, but also the way logic can make law explicit. An outstanding group of philosophers, logicians and jurists try to meet this issue. The book is more than a collection of papers. However different their respective conceptual tools may be, the authors share a common conception: legal argumentation is a specific argumentation context.

Le present livre, destine a des non-specialistes, constitue une introduction a la fois claire et precise a l'oeuvre decisive de Gottlob Frege. Markus Stepanians y explicite le sens de la combinaison fascinante elaboree par le pere de la philosophie analytique entre la philosophie des mathematiques, la philosophie de la logique et celle du langage. A ce titre, la traduction francaise du livre de Markus Stepanians offre au lecteur francophone une occasion rare de prendre toute la mesure de l'une des pensees les plus originales du vingtieme siecle.