 In his commentary on Priscian Minor, Brito endeavors to show that grammar meets the criteria a medieval discipline must meet in order to be considered a theoretical science. In doing so, he puts forth his own account of grammar as an independent theoretical science in terms of both subject matter and principles (for Brito’s theoretical grammar, see Pinborg 1967; Rosier-Catach 1983, 1999, 2010; Ebbesen 1998a.). Regarding grammar’s subject matter, Brito’s position is that, from the point of view of predication, significant speech (sermo significativus) is the general subject matter. In fact, significant speech is: 