Three papers are presented, and each is followed by two reactions. The first paper presents methods of dealing with questions about the conduct of scientific theorizing. The theory-models approach is explained as a mode for conducting part of the theory construction tasks required in the complete act of scientific inquiry. In the second paper a summary of research on reading acquisition is presented to demonstrate the importance of integrated-functional learning theory in dealing with human behavior. The third paper presents fundamental postulates common to the General Open Systems Theory and the Substrata-Factor Theory. Hierarchical working systems are noted for content areas. The sequential proration technique is seen as possibly providing a basis for determining the extent of a particular subsystem's impact on the suprasystem. Diagrams and references are included. (RT)