“…Because these methods are based on searching for features that are common to the training examples, we shall refer to them as similarity-based generalization methods. 1 In recent years, a number of researchers have proposed generalization methods that contrast sharply with these data-intensive, similarity-based methods (e.g., Borgida et al, 1985;DeJong, 1983;Kedar-Cabelli, 1985;Keller, 1983;Lebowitz, 1985;Mahadevan, 1985;Minton, 1984;Mitchell, 1983;Mitchell et al, 1985;O'Rorke, 1984;Salzberg & Atkinson, 1984;Schank, 1982;Silver, 1983;Utgoff, 1983;Winston et al, 1983). Rather than relying on many training examples and an inductive bias to constrain the search for a correct generalization, these more recent methods constrain the search by relying on knowledge of the task domain and of the concept under study.…”