The chapter analyzes the difficulty involved in conceiving of a working public opinion within a hyper-complex, massified society. The modernization and enlargement of democratic polities implies the need for specialization to comprehend relevant issues. The chapter argues that any effort to distinguish an expert from a political public sphere is doomed to failure due to the impossibility of deciding their boundaries. Without such boundaries, the public itself can be tempted to delegate more and more decisions to the expert sphere to obviate decision-making impasses. Yet, once an issue is declared within the purview of expertise, it is difficult to reclaim it for political debate.