“…Moreover, with studies of argumentation expanding into multi-agent systems, for argumentation-based negotiations (Cf. two surveys [18,37] for two-party negotiations and a recent work on multi-party current negotiations [3]), strategic dialogue games and persuasions [2, 6, 24-28, 31, 35, 36, 38-41], and others, it is preferable that an argumentation theory be able to accommodate a different nuance of arguments' acceptability locally per argument, and yet somehow in a logically principled manner. Future applications into the domain in mind, may-must scales are given to each argument, like local constraints in ADF, ensuring the locality.…”