What is the Theory Legal Argumentation For?

The paper aims to present the legal theories of legal argumentation constructed in the last century, organised into two groups: the precursors (Viehweg, Perelman and Toulmin) and the authors of the standard theory (MacCormick and Alexy). Then, some criticisms about all these conceptions are presented. And finally, an outline of a theory of legal argumentation is made, capable of overcoming some of the previous criticisms. The fundamental idea for this is to build a very abstract concept of argumentation that could then allow various interpretations or conceptions of legal argumentation. From here, one would be in a position to find an answer to the three main argumentative questions raised by legal practice: how to analyse an argument, how to evaluate it, how to argue.