Generative schemes and practical logic: invention within limits: Economy of logic.

This article deals with the principle of the economy of logic and economical logic. One thus has to acknowledge that practice has a logic which is not that of logic, if one is to avoid asking of it more logic than it can give, thereby condemning oneself either to wring incoherences out of it or to thrust upon it a forced coherence. The principle of the economy of logic, whereby no more logic is mobilized than is required by the needs of the practice, means that the universe of discourse in relation to which this or that class is constituted, can remain implicit, because it is implicitly defined in each case in and by the practical relation to the situation. Given that it is unlikely that two contradictory applications of the same schemes will be brought face to face in a universe of practice. The fact that symbolic objects and practices can enter without contradiction into successive relationships set up from different points of view means that they are subject to overdetermination through indetermination. The uncertainties and misunderstandings inherent in the logic of suggestion and ambiguity are thus the price that has to be paid for the economy which results from reducing the universe of the relations between opposites and of the relations between these relations to a few basic relations from which all the others can be generated.