Several legal arguments use the notion of ratio legis in order to sustain a normative conclusion, in particular the argument from analogy and some forms of teleological argumentation. However, determining the ratio is often a difficult and controversial task. In this paper we look firstly at the speech acts typically performed by legal practitioners in order to determine the ratio and, secondly, we take into account the argumentative commitments they undertake in so doing and the argumentative constraints put on them. This will lead us to distinguish different uses of the notion of ratio legis and to ask on what conditions each of them is justified.The final cause of the law is the welfare of society. The rule that misses its aim cannot permanently justify its existence.(B. N. Cardozo)
Two ExamplesWhat is the ratio legis? It is the purpose of a legal rule; in particular, in civil law systems, the purpose of a statute enacted by the legislature. The ratio legis is important for legal theory and legal argumentation for two reasons at least. It plays a