This chapter exposes some concrete and contemporary manifestations of the epistemology of the secret of international law. It particularly sheds light on the way in which the postulation of a hidden, unknown, invisible content as well as the experience of the necessity to reveal such content play out in international legal thought and practice, for the sake of ordering what can be said, thought, perceived and actioned through international law. The chapter then illustrates how such two necessities come to enable a mass production of speech materials which, in turn, determines what can possibly be said, thought, perceived and actioned through international law.