Learning From Examples Using Hierarchical Counterfactual Expressions

Abstract

The data structure HC-expression is flexible due its multilevel exceptions. This allows it to learn disjunctive concepts and concepts with some internal structure. The satellite functions and the incremental algorithm 42 were presented. The empherical constants for similarity and quality threshold have to be carefully chosen. We find that the HC-expressions are flexible and versatile enough to represent disjunctive and conjunctive concepts.