This volume marks the completion of the publication of all the papyri on logic included in the editorial project. The texts published here present various expressions of ancient logic – such as the famous Perì apophatikón, attributed by some to Chrysippus of Soli, and P. Hibeh 184, which shows Platonic influences instead – and other scientific texts, such as P. Louvre inv. 7733r on the fallacy of optical visions. The publication includes papyri spanning chronologically from the third century B.C. to the fourth century A.D.