Performance data for 42 subjects pertaining to seven course objectives and ten propositional logic tasks were analyzed for hierarchical relationships using ordering theoretic technique. The resulting hierarchy indicated that simple implication and particular contraposition propositional logic tasks were prerequisite to some course objectives. This procedure was discussed as being useful in generating hierarchies in subject areas less amenable to this process and of value in the design and implementation of competency based teacher education and mastery learning systems. (Author)