No one has proven anything as far as I can tell. Can someone summarize this alleged proof in a couple sentences? As far as discarded script goes, according to spy reports an earlier draft for the script for AOTC had "Sifo-Dyas" as a made up name no one recognized. The final movie script makes it obvious it was an actual Jedi whose name is recognized by Obi-wan, Mace, and Yoda. Big change.