The moral correction of a decision is not empirically falsifiable, since it is a quality normative (moral) that predicts the results. However, we can empirically test the conditions that guarantee a greater or lesser rationality of the results, one of the conditions of its legitimacy. Deliberation is usually treated as a decision-making procedure with important cognitive and political benefits. However, this approach falls short to appreciate the full consequences of the deliberative process. The role of empirical evidences in theories of deliberation should not be counted as evidence for or against deliberation, but can show the various dimensions of success and the means of achieving them. A satisfactory answer to this question should entail measures to enhance the democratic capacity of citizens and the group dynamics in different participatory practices within the public sphere. Unless the capacity gained within these practices is visibly and comprehensibly linked to actual decision-making processes, the question of “why deliberate” would remain a continuing dilemma for democratic societies.
http://www.scielo.org.co/pdf/papel/v18n1/v18n1a07.pdf