First we need to understand
praxeology. It is the study of human action logic. It is action logic that
takes into account time and causality. It is logic action in the passage of
time. The notable characteristics of praxeology are time and causality and
human action.
What emerges from this reflection is
the consideration of the difference between a priori and a posteriori
reasoning. A priori is from cause to effect, is based on something known – such
as natural law – and it is valid independently of observation. A posteriori is
based upon actual observation or upon experimental data, starting there and
working back to their causes. Speaking about the power of science and the power
of appropriate methodology, Mises says: “What makes natural science possible is
the power to experiment, what makes social science possible is the power to
grasp or to comprehend the meaning of human action.” [Ludwig von Mises, Money, Method and the
Market Process (Kluwer Academic Publishers, 1990), Ch. 1, Section III.]
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