Any Christian is able to observe this when in fellowship with God. He might be a popular figure amongst those electing him, but this simply manifests he doesn’t have any Divine Authority other than that of any other believer and their unique spiritual gifts given by God.
Ahhh, the contradiction of Core. There's no heresy like an old heresy, eh?
And people say non-Catholics have no sense of Tradition.
Well the proof is right here where someone clearly states the same heresy Core stated which proves non-Catholics love the old, traditional, clearly described as a heresy, tried, time tested, clearly condemned heresies. Now, that's Tradition with a capital T.