INVESTIGADORES
TOHME Fernando Abel
artículos
Título:
Two approaches to the problems of self-attacking arguments and general odd-length cycles of attack
Autor/es:
BODANZA, GUSTAVO; TOHMÉ, FERNANDO
Revista:
JOURNAL OF APPLIED LOGIC
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2009 vol. 7 p. 403 - 420
ISSN:
1570-8683
Resumen:
The problems that arise from the presence of self-attacking arguments
and odd-length cycles of attack within argumentation frameworks are
widely recognized in the literature on defeasible argumentation. This
paper introduces two simple semantics to capture different intuitions
about what kinds of arguments should become justified in such scenarios.
These semantics are modeled upon two extensions of argumentation
frameworks, which we call sustainable and tolerant. Each
one is constructed on the common ground of the powerful concept of
admissibility introduced by Dung in [P.M. Dung, On the acceptability of
arguments and its fundamental role in non-monotonic reasoning, logic
programming, and n-person games, Artificial Intelligence 77
(1995) 321357]. The novelty of this approach consists in viewing the
admissibility of a subset of arguments as relative to potentially
challenging subsets of arguments. Both sustainable and tolerant
semantics are more credulous than preferred semantics (i.e. they justify
at least the same arguments, and possibly more). Given certain
sufficient conditions they coincide among them as well as with other
semantics introduced by Dung.