Hence, this collective volume aims at approaching a more centered discussion on limits, potentialities, and unexpected qualities of the notion of ignorance. The contributions to this collection show very well how the study of ignorance can animate the debate on a broad spectrum of issues in philosophy, epistemology, cognitive science, and logic. In particular, we have considered three general areas of research: logic and philosophy of science; cognitive science and the philosophical investigations of cognition; social and pragmatical issues in epistemology. In this socio-cultural moment, in which scientific results are sometimes politically and socially contested, and critical reasoning is rarely considered an urgent priority of standard ed...