Abstract
Argumentation aims at increasing acceptability
of claims by supporting them with arguments.
Roughly speaking, an argument is a set of premises
intended to establish a definite claim. Its strength
depends on the plausibility of the premises, the nature of the link between the premises and claim, and
the prior acceptability of the claim. It may generally be weakened by other arguments that undermine one or more of its three components.
Evaluation of arguments is a crucial task, and a sizable amount of methods, called semantics, has been
proposed in the literature. This paper discusses two
classifications of the existing semantics: the first
one is based on the type of semantics’ outcomes
(sets of arguments, weighting, and preorder), the
second is based on the goals pursued by the semantics (acceptability, strength, coalitions)