Yes, I guess the rest of us (faithful) will have to figure that out.
It would seem that the ex cathedra doctrine was new. Or at least, not very well defined before.
So, the possibility to do it was always there, it just had to be defined by a council, which would be in keeping with the protocol of magisterial infallibility?
I was actually thinking of the Bill of Rights. Some founders were against having one because if a list of rights was made…it would call into question the things that weren’t on the list I guess they thought that the Supreme Court needed a starting point, other than the rights that existed manifestly.