Furthermore, I call into question the application of Billot's rationale to the post-V2 church. Like the Arians of their day, the V2 churchmen and laity are heretics (all material, some knowingly formal) and as such, accept the new rites as legitimate, because of their foundational error of accepting V2 as orthodox. Ergo, their "universal acceptance" of a similarly-heretical associate in no way confirms legitimacy, anymore than if 1,000,000 protestants all "interpret" that John 6's Eucharist is symbolic, then group-think makes it so.