In several recent publications in the philosophy of chemistry we have made use of a repertoire of analytical concepts to guide our investigations. Perhaps studies of other sophisticated knowledge garnering practices could benefit from adopting this analytical scheme if we want to understand their merits and drawbacks. Our suggestions for shaping methodologies for philosophical studies in particular fields of interest includes both the natural sciences, legal systems in action, economies and their management, warfare, preparing the dishes of a cuisine, and (...) so on. Adopting our proposals would encourage philosophers to examine our world seen as fields of material and cultural/social entities affording opportunities for action. At a certain level of analysis, the products of such action, appear to be perfectly identical entities, fungibles. There are no fungibles in nature. They must therefore be thought of as constituents of iconic models. Our scheme for critically examining the practices of investigators is meant to ensure the intelligibility both of the relevant discourse and the trustworthiness of the practices of the discipline in question. The Third Wittgenstein's ‘hinges’ that function as necessities and yet are vulnerable to empirical assessment provide a generic frame for analyses of human practices. (shrink)