Abstract
Case-based reasoning (CBR) and rule-based reasoning (RBR) are two paradigms for building knowledge-based systems. They represent both distinct approaches to knowledge-based systems development and distinct cognitive models of human problem solving. They are usually viewed as competing, rather than complementary, paradigms. However, our investigation shows that in combination, they can provide both a stronger approach to knowledge-based systems development and a broader cognitive model. The domain of our investigation is the design of nutritious, yet appetizing, menus. Both logic and experience play roles in this domain. Our approach is to construct two expert systems, one case-based and one rule-based, to perform the same task. We compare and contrast our two systems, to identify the strengths and weaknesses of each.
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