Use of argumentation methods applied to legal reasoning is a relatively new field of study. The book provides a survey of the leading problems, and outlines how future research using argumentation-based methods show great promise of leading to useful solutions. The problems studied include not only these of argument evaluation and argument invention, but also analysis of specific kinds of evidence commonly used in law, like witness testimony, circumstantial evidence, forensic evidence and character evidence. New tools for analyzing these kinds of evidence are introduced.

Résumé
During a recent visit to China to give an invited lecture on legal argumentation I was asked a question about conventional opinion in western countries. If legal r- soning is thought to be important by those both inside and outside the legal prof- sion, why does there appear to be so little attention given to the study of legal logic? This was a hard question to answer. I had to admit there were no large or well-established centers of legal logic in North America that I could recommend as places to study. Going through customs in Vancouver, the customs officer asked what I had been doing in China. I told him I had been a speaker at a conf- ence. He asked what the conference was on. I told him legal logic. He asked 1 whether there was such a thing. He was trying to be funny, but I thought he had a good point. People will question whether there is such a thing as legal logic, and some recent very prominent trials give the question some backing in the common opinion. But having thought over the question of why so little attention appears to be given to legal logic as a mainstream subject in western countries, I think I now have an answer. The answer is that we have been looking in the wrong place.

Contenu
Informal Logic Methods for Law.- Generalizations in Legal Reasoning.- Defeasible Reasoning in Dialogue Systems.- Relevance Determinations of Legal Evidence.- Methods Applied to Problems of Evidence.- Dialectical Explanation in AI.- Argument Invention for Proof Preparation.