See book I linked above for proof.
You wrote: "See book I linked above for proof."
I did. Make a claim or don't.
Zemo, when will you get the courage to deal with the following already posted to you once before:
"Uh, you do realize that 1) filioque didn't start with the Franks right? I mean, you did know that it was discussed in Toledo in 447 didn't you? You do realize that the Franks were not EVEN BAPTIZED CHRISTIANS AT THAT POINT RIGHT? 2) it isn't a change in doctrine (even some EOs admit this)."
Or how about:
"A change in doctrine would be like when some EOs renounced the Assumption of Mary for no other reason than the fact that the Catholic Church defined it as doctrine in 1950!!! How disgusting! That's the sort of lunacy that follows in the wake of anti-Catholic hatred."
Any comment? Attempt at refutation? Links to books you haven't actually read and don't understand?