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Defeasible Reasoning and Uncertainty Management Systems II

Objective

DRUMS II is a continuation of the DRUMS I Basic Research Action (3085), in which defeasible reasoning, uncertainty and incompleteness were studied. The overall objective is to investigate symbolic and quantitative methods of representation and reasoning able to deal with knowledge that is uncertain and defeasible. Six topics have been selected that are of fundamental importance in the domain of defeasible and uncertain reasoning:

- Belief change Organisation of the body of existing results for modelling belief changes so as to assess what is common to these belief change schemes.
- Non-monotonic deduction Integration of four general frameworks for deduction, namely Gentzen systems, labelled deductive systems, the axiomatisations of the consequence relation, and category theory; in order to provide appropriate insights into the nature and mechanism of non-monotonic deduction.
- Inconsistency in reasoning Development of a logic-based model that accounts for inconsistency in reasoning.
- Abduction Clarification of the relationships and actual differences of numerical, logical and machine learning perspectives of abduction.
- Algorithmic problems Study of the algorithmic problems of uncertain reasoning, taking as general a viewpoint as possible.
- Dynamic reasoning with partial models Study of the dynamics of non-monotonic reasoning using information structures as a vehicle for representation.
The symbolic and quantitative methods of representation and reasoning able to deal with knowledge that is uncertain and defeasible have been investigated. The 6 topics under study are: belief change, nonmonotonic deduction, inconsistency in reasoning, abduction, algorithmic problems and dynamic reasoning with partial models.

The major achievement is the integration of both the symbolic and numerical approaches for handling uncertainty problems, bridging the gaps between 2 usually diametrically opposed approaches. Strong cross fertilization is apparent. The results will be presented in a series of handbooks.
APPROACH AND METHODS

The project is centred on topics, and not on methods as was the case in DRUMS I. Partners are distributed amongst the six topics, creating a context favourable for strong integration between numerical and symbolic approaches as well as between various schools of thought.

POTENTIAL

The project will provide a better understanding of the models proposed to represent and to handle uncertainty and defeasible reasoning, two topics that seem to have become major issues in the development of information systems.

Coordinator

VRIJE UNIVERSITEIT BRUSSEL
Address
Avenue F.d. Roosevelt, 50, 122
1050 Bruxelles
Belgium

Participants (18)

AALBORG UNIVERSITET
Denmark
Address
Fibigerstraede, 13
9220 Aalborg East
Centre National de la Recherche Scientifique (CNRS)
France
Address
Campus Du Beaulieu
35042 Rennes
Centre National de la Recherche Scientifique (CNRS)
France
Address
118 Route De Narbonne
31062 Toulouse
Consejo Superior de Investigaciones Cientificas
Spain
Address
Serrano 144
28006 Madrid
DEUTSCHES FORSCHUNGSZENTRUM FUER KUENSTLICHE INTELLIGENZ GMBH
Germany
Address
Stuhlsatzenhausweg 3
66123 Saarbrücken
IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE
United Kingdom
Address
Queens Gate 180
SW7 2BZ London
LINKOEPING UNIVERSITY
Sweden
Address
Valla
83 Linkoeping
Queen Mary and Westfield College
United Kingdom
Address
Mile End Road
E1 4NS London
Technische Universität Carolo-Wilhelmina Braunschweig
Germany
Address
Pockelsstraße 14
38106 Braunschweig
UNIVERSITA DEGLI STUDI DI TORINO
Italy
Address
Corso Svizzera 185
10149 Torino
UNIVERSITAIRE INSTELLING ANTWERPEN
Belgium
Address
Universiteitsplein, 1
2610 Wilrijk
UNIVERSITAT DE GRANADA
Spain
Address
Cuesta Del Hospicio
18071 Granada
UNIVERSITE DE FRIBOURG
Switzerland
Address
Misercicorde
1700 Fribourg
UNIVERSITEIT VAN AMSTERDAM
Netherlands
Address
, 7161
1007 MC Amsterdam
UNIVERSITY OF LUND
Sweden
Address
Ole Romers Vag, 1118
221 00 Lund
Università degli Studi di Catania
Italy
Address
Viale Andrea Doria 6
95125 Catania
Université d'Aix-Marseille I (Université de Provence)
France
Address
3 Place Victor Hugo
13331 Marseille
Université de Paris XI (Université Paris-Sud)
France
Address
Avenue Georges Clémenceau
91405 Orsay