Mathematicians sometimes distinguish between propositional constants, propositional variables, and schemata. Schemas are activated from perceptual stimuli or from the output of recently activated schemata. Rules of inference are often formulated as schemata employing metavariables. Factors represent norms with respect to schemata. The 12 categories, or "a priori" concepts, are related to phenomenal appearances through schemata. These "basic beliefs", "cognitive schemata" or "ideology" are of great individual and social importance. Thus, Methods have to be in place for reconciling different representations of objects and schemata. The framework attempted to permit multiple data models to be used for external schemata. People can quickly organize new perceptions into schemata and act without effort. Self-knowledge can be categorized by structures in memory or schemata. The alethic part of PFL is identical to the "Boolean term schemata" of Quine (1982). Assimilation is the reuse of schemata to fit the new information. Each artist inherits '"schemata" that designate reality by force of convention'. Still, some authors harbor more scientific ambition for their literary schemata than others. These information tables were specified as SQL/Schemata in .