Identification through dialectical and aristhotelic judgments of the concordance between the built analytical reality and the empirical one assures the check of the analytical economicity’s principle. This contributes to the permanent validity’s grounding of the comparative advantage’s principle in the exchange connections between the competitive economies. Meanwhile, the demythification of its full and permanent usage is also supported, in the way of its maximum potential’s capitalization in the goods’ choice. The comparative advantage’s principle is nothing but an application of the minimum effort’s principle, the last one having a wider area of action.