  First, in the Greek tradition, we nowhere find evidence of an Alexandrian philosopher named David; neither the Suda nor Hesychius nor Photius nor anyone else seems to know of any such person. Second, the texts we have were evidently widely distributed and read, and an abbreviated and simplified version of the ‘Prolegomena to Philosophy’ was translated at some point into Armenian (our earliest manuscripts date from the 14th century). The Armenian version was given a new title and attributed to ‘David, the Invincible’, who, according to the Armenian tradition, however, was a theologian of the 5th century. It is impossible to believe that the Armenian theologian and the (Alexandrian) philosopher a century later were one and the same.  There is also no reason to believe that the latter David was of Armenian origin. Here, the cross-fertilization of intellectual traditions has given rise to a great deal of confusion which, in the absence of earlier manuscripts, is quite impossible to clear up completely.