2025-04-172025-04-172025-04-03COIMBRA, Agnes Calado. Justificação racional em Robert Alexy. Orientador: Saulo Monteiro Martinho de Matos. 2025. 17 f. Trabalho de Curso (Licenciatura em Filosofia) - Faculdade de Filosofia, Instituto de Filosofia e Ciências Humanas, Universidade Federal do Pará, Belém, 2025. Disponível em: https://bdm.ufpa.br/handle/prefix/7986. Acesso em:.https://bdm.ufpa.br/handle/prefix/7986This paper presents and examines Robert Alexy's legal argumentation theory. It aims to defend its practical viability as a tool for addressing dissent in the discursive practice of law. Using a deductive methodology, each section corresponds to an argumentative stage in which reasons are provided for the acceptability of the proposed premises. It is argued that Alexy's theory offers rational criteria for the justification of judicial decisions, particularly in cases involving interpretative divergences in law, such as conflicts between norms and specifically between principles. The analysis culminates in defending the thesis that there is a philosophical-legal problem in the application and interpretation of law to which the theory of argumentation provides an adequate response. The article also discusses criticisms raised by Manuel Atienza in order to assess the applicability of Alexy's theory in real court rulings. Keywords: legal argumentation theory; Robert Alexy; grounding; legal decisions.Acesso AbertoTeoria da argumentação jurídicaRobert AlexyFundamentaçãoDecisões judiciaisLegal argumentation theoryRobert AlexyGroundingLegal decisionsCNPQ::CIENCIAS HUMANAS::FILOSOFIATrabalho de Curso - Graduação - ArtigoAttribution-NonCommercial-NoDerivatives 4.0 International