@article {3372,
title = {Deductive Coherence and Norm Adoption},
journal = {Logic Journal of the IGPL},
volume = {18},
year = {2010},
pages = {118-156},
publisher = {Oxford University Press},
chapter = {118},
abstract = {This paper is a contribution to the formalisation of Thagard{\textquoteright}s coherence theory. The term {\textquoteright}coherence{\textquoteright} is defined as the quality or the state of cohering, especially a logical, orderly, and aesthetically consistent relationship of parts. A coherent set is interdependent such that every element in it contributes to the coherence. We take Thagard{\textquoteright}s proposal of a coherence set as that of maximising satisfaction of constraints between elements and explore its use in normative multiagent systems. In particular, we interpret coherence maximisation as a decision-making criterion for norm adoption. We first provide a general coherence framework with the necessary computing tools. Later we introduce a proof-theoretic characterisation of a particular type of coherence, namely the deductive coherence based on Thagard{\textquoteright}s principles, and derive a mechanism to compute coherence values between elements in a deductive coherence graph. Our use of graded logic helps us to incorporate reasoning under uncertainty, which is more realistic in the context of multiagent systems. We then conduct a case study where agents deliberate about norm adoption in a multiagent system where there is competition for a common resource. We show how a coherence-maximising agent decides to violate a norm guided by its coherence.},
keywords = {deductive coherence, multiagent systems, normative systems},
author = {Sindhu Joseph and Carles Sierra and Marco Schorlemmer and Pilar Dellunde}
}