\input zb-basic \input zb-ioport \iteman{io-port 06059481} \itemau{Bench-Capon, Trevor} \itemti{Open texture and argumentation: what makes an argument persuasive?} \itemso{Artikis, Alexander (ed.) et al., Logic programs, norms and action. Essays in honor of Marek J. Sergot on the occasion of his 60th birthday. Berlin: Springer (ISBN 978-3-642-29413-6/pbk). Lecture Notes in Computer Science 7360. Lecture Notes in Artificial Intelligence, 220-233 (2012).} \itemab Summary: Although Marek Sergot's contribution to artificial intelliegnce and law is mainly associated with the formalisation of legislation as a logic program, he also wrote on an approach to the treatment of open textured concepts in law, using argumentation. That paper posed the question what makes an argument persuasive? This short paper considers the ideas of that paper and discusses developments in AI and law over the subsequent 25 years, focusing on the progress made in answering this question in that domain. \itemrv{~} \itemcc{} \itemut{} \itemli{doi:10.1007/978-3-642-29414-3\_12} \end