Argumentation is defeasible when it is possible that conclusions are
withdrawn in the light of further argumentation. This interdisciplinary
study reports on current research in artificial intelligence, legal
theory and argumentation theory. It is relevant for all interested in
defeasible argumentation, legal reasoning and argument assistance
software. The author combines theoretical reflection with illustrative
examples and provides an overview of research into the design of
argumentation software, which will be of interest both to researchers in
the field of artificial intelligence and the law, and to legal
practitioners.