
TL;DR
This paper introduces a framework for gradual argument acceptability, allowing for multiple levels of argument strength beyond traditional binary classifications, based on their interactions and preferences.
Contribution
It extends Dung's argumentation framework by defining valuation models and acceptability classes that incorporate graduality for more nuanced argument evaluation.
Findings
Defined several valuation models for argument strength.
Introduced new acceptability classes based on gradual valuation.
Provided a refined approach to argument acceptability levels.
Abstract
Argumentation is based on the exchange and valuation of interacting arguments, followed by the selection of the most acceptable of them (for example, in order to take a decision, to make a choice). Starting from the framework proposed by Dung in 1995, our purpose is to introduce 'graduality' in the selection of the best arguments, i.e., to be able to partition the set of the arguments in more than the two usual subsets of 'selected' and 'non-selected' arguments in order to represent different levels of selection. Our basic idea is that an argument is all the more acceptable if it can be preferred to its attackers. First, we discuss general principles underlying a 'gradual' valuation of arguments based on their interactions. Following these principles, we define several valuation models for an abstract argumentation system. Then, we introduce 'graduality' in the concept of acceptability…
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