The paper with title “A Multi Attack Argumentation Framework”, by Alexander Vassiliades (PhD student of the School of Informatics), Giorgos Flouris, Theodore Patkos, Antonis Bikakis, Nick Bassiliades (Professor of the School of Informatics) και Dimitris Plexousakis, that was presented at the Fourth International Conference on Logic and Argumentation (CLAR 2021) on 21/10/2021, has won the Best Paper Award.