Before going over the contra arguments against the authenticity of the Vulgate Prologue from Jerome, we have to remember that there is a burden of evidence on both sides.sister threads
Raising the Ghost of Arius - Grantley McDonald
Vulgate Prologue - super-evidence
'multiplication of nothings' - searching out the contra Vulgate Prologue authenticity arguments
A prima facie reading of the Vulgate Prologue "fits". We will see that the common contra opposition tries to use this against authenticity. Of course, a forger tries to look like Jerome! Its very appearance of authenticity proves that it is a forgery! (sic).
A theory of forgery has to struggle with means motive and opportunity for a crass forgery. Who did this supposed nefarious deed, what was their motive, and how did they manage to get it into Codex Fuldensis under the nose of Victor of Capua and then take over the Latin text-line!
Many elements to consider, we we look at the various arguments, the multiplication of nothings, that the Vulgate Prolougue is not from Jerome.