Emiliano Ippoliti is Assistant Professor of Logic and Theories of Reasoning at Sapienza University of Rome. His main interests are heuristics, the logic of discovery, finance, and problem-solving. He is in the process of writing a book, The Advancement of Knowledge: Data, Hypotheses and Novelty.Cesare Cozzo is Associate Professor of Logic at Sapienza University of Rome. His research mainly focuses on the relations between the philosophy of logic and mathematics and the theory of meaning. He is the author of Meaning and Argument and Introduzione a Dummett [Introduction to Dummett].