"Non, quemadmodum causa postulat, narratur ...". Mario Vittorino e la spiegazione di Cic. inv. 1.30: tra tecnica espositiva e "praevaricatio" oratoria

It is well known that the young Cicero’s manual in two books (Rhetorici libri duo), commonly known in the modern age as De inventione, was the most read Latin rhetorical work in the late ancient age. The explanatory commentary on it, written by Gaius Marius Victorinus in the fourth century. A.D., which had good success during medieval and humanistic times, is commonly considered a not-so-creative treatise; it offers, however, interesting information to understand the correct meaning and real scope of the oratory praevaricatio, a forensic offense that can be sanctioned extra ordinem starting from the third century. A.D.