“…Generally, it can be seen as a source of knowledge for the APS, and has to have sufficient breadth and depth in order to tackle any issues that may be raised during a persuasion attempt. It can be populated manually [HH19,RII19], through argument mining [LT16,SS19], through argument harvesting/crowdsourcing [CHHP18,CHHP19], or by any combination of these methods. The contents of an argument can be textual, as seen in natural language dialogues or newspapers, or follow a particular logical structure, as obtained from formal knowledge bases.…”