In theme of arbitration, the contradictory nature which is reference the art. 829, co. 1, n. 11 cod. Proc. OD. proc. civ., in the text anterior a the in force, ma va agreement in the sense that the contrast must emerge between the different components of the device, or between the motivation e the device, while the contradiction internal between the different parts of the motivation not detects like vice in as much, but only when it is It prevents the reconstruction of the iTer logical and legal underlying to decision per total absence a a motivation attributable to its functional model.