sentences:  Diels claimed that Aetius himself was merely abridging a work which Diels (1879) called "Oldest Tenets" or, in Latin, "Vetusta Placita".Unlike Aetius, whose existence is attested by Theodoret, the "Vetusta Placita" is Diels' invention and is generally disregarded by modern classicists, e.g., the 1999 "Cambridge History of Hellenistic Philosophy".Quotes which are ascribed to Aetius in scholarly essays were actually discovered in either the abridgements of Pseudo-Plutarch or Stobaeus, or Theodoret's full quotes in rare cases, or finally one of several ancient authors who provided corrections to misquotes in one of these works.