In theme of arbitration, the sanction of nullity provided by art. 829, co. 1, n. 11, cod. Proc. Civ. o. 1, n. 5, cod. proc. civ., ma it is understanding in the sense that said contradictory (must be to emerge the different components of the device, or between the motivation ED the device, the C ONTRADDITITITY INTERNAL between the different parts of the motivation, not expressly foreseen between i vices that involve the nullity of the praise, can assume relevance, which vice vice, solant o in what determines the impossibility absolute of reconstruct the logical process and legal below to the decision per total absence a motivation attributable to its functional model.