The third theme of Schutz's philosophy or theory of the social or cultural sciences is methodology in a narrow signification. It is about rules of procedure, which are articulated with "postulates." These are to be obtained by reflective observation and analysis of actual scientific practice, then reported back to the scientists whose practice they explicate. A complete interpretation of Schutz’s thought in this respect has yet to be published. Besides those postulates included in the several lists, the moves, for example, of abstracting nature from the rest of the sociocultural world in the naturalistic sciences and of using individual action as a starting point in the cultural sciences are explicitly said to be postulates, while the requirement of adopting a theoretical attitude is only implicitly a postulate for all science.