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The basic idea of such theories is that an expression 's meaning ( in the sense of intension ) is determined by its value ( extension ) at a set of points of evaluation ( worlds ) . They also provide medical coverage for the Project for Adolescent and Child Evaluation ( PACE ) Foster Care Program . A Protection Profile ( PP ) is an implementation-independent set of security requirements for a class of Targets of Evaluation ( TOEs ) that meet the specific consumer needs . The Penn State researchers created the scenario-based evaluation ( SBE ) method as an alternative to evaluations that focus simply on feature sets and their performance attributes .