The study analyzes Mises‘s approach to the question of apriorism in a broader methodological context. It shows that it is not inevitable to advocate the aprioristic character of economics (resp. science of human action), as Mises does, to maintain the subjectivist-individualist methodology and the effort to adequately grasp the general laws of human action from its perspective. The present redefinition of apriorism is developed on the basis of thoughts of Barry Smith and Alfred Schutz. It suggests abandoning the apodictic character (...) of apriori (which is untenable) and move closer to a broadly defined empiricism. The methodological insights developed in the paper are finally used to contribute to the debate between the behavioral economists and the proponents of rational choice theory. (shrink)