| The system FORTE (First Order Revision of Theories from Examples) has been described in [Bradley]. It is a machine learning system for modifying a first-order Horn-clause domain theory to fit a set of training examples. FORTE uses a hill-climbing approach to revise theories, it identifies possible errors in an input theory and calls on a library of operators to develop possible revisions. These operators are constructed from methods such as propositional theory refinement, first-order induction, and inverse resolution.
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