The paper aims to provide a brief discussion regarding the concept and typology of paradigm, as it is used in the philosophy of science. To this end, a set of sufficiency predicates are proposed that characterize any generic paradigm, based on which a typology of possible categorial paradigms is built up. The category of praxiological paradigm is then logically and historically examined using a logical ”filter” with five parameters, including the sustainable paradigm (as barely sprouted today) and the viability paradigm (the most desirable one o be got). The study is carried out from the conceptual and philosophical perspective only.