Abstract
Even in the sociology of knowledge proposed by Berger/Luckmann, as well as in the traditional studies of social thought, the fundamental schema is “ideologist” one. For they totally treat the professional thoughts as the derivatives from a certain ‘Basement’. Against this viewpoint, we investigate the connection between the study of definition of the situation and that of social thought. The former proposes to describe the schema used in a certain aspect of social life. The latter can extract the schema as the ‘hard core’ of the ‘program’. By comparing these two kinds of schemata, we can also represent the propagation and transformation of professinal thoughts. Study of social thought penetrating into wider range may start there.
