In matters of challenge to an arbitral award, a failure of reasoning as a defect falling under art. 829, co. 1, n. 5, cod. proc. civ., read with art. 823, n. 3, cod. proc. civ., is to be found only where the reasoning of the award is wholly lacking or is so deficient as not to allow the ratio of the decision adopted to be identified, or as to disclose a line of argument wholly unacceptable in dialectical terms, so as to amount to an absence of reasoning.