Some authors have talken about the problem of the future contingents Aristotle exposed in De Interpretatione IX. But most of them do not explain the role of that chapter in his own work. Last analysis always try to find a formal solution. And this is very significative because De Interpretatione is a treatise that belongs to the semantic of the Organon. In this article we show that: 1. The aim of the problem of future contigents is not only formal and (...) the frame of the Aristotle’s solution. 2. Its implication with others important concepts in his philosophy like “substance”, “truth” and “dialectics”. (shrink)