Challenge of an arbitral award for contradiction proves unfounded when the reasoning is coherent with the operative part and the arbitrator correctly applies legal principles to contractual agreements invoked by the parties, rejecting the claim for lack of essential prerequisite contractually provided.
Criticisms of the merit evaluation effected by the arbitrator cannot constitute the object of review in arbitral award challenge proceedings, no exhaustive nullity hypothesis provided by Article 829 of the Code of Civil Procedure being present.