Look, all I am pressing for, is that the history of scholarly activities of pre-Islamic Persia is only based on "guess" and "hope", to use your own words. I don't see anybody, even the professional academics, producing any sound evidence, similar to the ones we have of Babylon, Egypt, Greece etc, at least capable of throwing some light on the theory. I see nothing in the academic literature, except pure speculations.I would guess (or hope), it is undisputed that academic traditions of the Sassanid empire, in Babylon, Gundishapur and elsewhere, was one of the if not the most important source of early Islamic scholarly tradition.
Is it so important, how big a role Pahlavi really played in the learned world of the Sassanid empire or whether this was dominated by Aramaic and Greek?
I hope I am not being rude, but have you ever seen a page of pre-Islamic scholarly work in Pahlavi, or do you know the address of any such thing in a museum?