DeepAI AI Chat
Log In Sign Up

Pareto Optimality and Strategy Proofness in Group Argument Evaluation (Extended Version)

by   Edmond Awad, et al.

An inconsistent knowledge base can be abstracted as a set of arguments and a defeat relation among them. There can be more than one consistent way to evaluate such an argumentation graph. Collective argument evaluation is the problem of aggregating the opinions of multiple agents on how a given set of arguments should be evaluated. It is crucial not only to ensure that the outcome is logically consistent, but also satisfies measures of social optimality and immunity to strategic manipulation. This is because agents have their individual preferences about what the outcome ought to be. In the current paper, we analyze three previously introduced argument-based aggregation operators with respect to Pareto optimality and strategy proofness under different general classes of agent preferences. We highlight fundamental trade-offs between strategic manipulability and social optimality on one hand, and classical logical criteria on the other. Our results motivate further investigation into the relationship between social choice and argumentation theory. The results are also relevant for choosing an appropriate aggregation operator given the criteria that are considered more important, as well as the nature of agents' preferences.


page 1

page 2

page 3

page 4


Judgment Aggregation in Multi-Agent Argumentation

Given a set of conflicting arguments, there can exist multiple plausible...

Preservation of Semantic Properties during the Aggregation of Abstract Argumentation Frameworks

An abstract argumentation framework can be used to model the argumentati...

Computing and Testing Pareto Optimal Committees

Selecting a set of alternatives based on the preferences of agents is an...

Aggregation in Value-Based Argumentation Frameworks

Value-based argumentation enhances a classical abstract argumentation gr...

Experimental Assessment of Aggregation Principles in Argumentation-enabled Collective Intelligence

On the Web, there is always a need to aggregate opinions from the crowd ...

Egalitarian Judgment Aggregation

Egalitarian considerations play a central role in many areas of social c...

Method for Searching of an Optimal Scenario of Impact in Cognitive Maps during Information Operations Recognition

In this paper, we consider the problem of choosing the optimal scenario ...