Basic formulation Explanation-based learning

^ keller, richard (1988). defining operationality explanation-based learning (pdf). artificial intelligence. 35 (2): 227–241. doi:10.1016/0004-3702(88)90013-6. retrieved 2009-02-22. current operationality defn.: concept description operational if can used efficiently recognize instances of concept denotes  after stating common definition, paper argues against in favor of more-refined criteria.