Formal approaches to rule-based systems in medicine: The case of CADIAG-2
There is no established formal framework for expert systems based on weighted IF-THEN rules. We discuss three mathematical models that have been recently proposed by the authors for CADIAG-2-a well-known system of this kind. The three frameworks are based on fuzzy logics, probability theory and possibilistic logic, respectively. CADIAG-2 is used here as a case study to evaluate these frameworks. We point out their use, advantages and disadvantages. In addition, the described models provide insight into various aspects of CADIAG-2. (C) 2012 Elsevier Inc. All rights reserved.
cadiag-2 probability theory possibilistic logic medical expert systems t-norm based logics