Between politics and expertise. An Italian perspective on constitutional law and scientific legitimacy

The dialectic between the technically (or scientifically) possible and the legally possible, which is implied in decision-making in conditions of uncertainty, raises crucial issues from a constitutional perspective. In particular, the emergence of a new factor of legitimacy – which could be envisaged as a form of “scientific legitimacy” – can be detected and needs to be integrated within the constitutional discourse. Through an overview of the case law of the Italian Constitutional court, the paper aims at highlighting the possible approaches to the need of a deeper integration of technical and scientific knowledge within the public decision-making processes, in an attempt to strike a balance capable of avoiding the two extremes of scientifically weak decisions on one hand, and of “technical deference” to experts on the other.