Let us assume the sedevacantist position is correct -- would the rest of the Catholic bishops, by recognizing a false bishop of Rome, be putting themselves outside of the Church? Most, if not all, sincerely believe that he is the pope, and there are ways to make sure he has been validly elected. (Maybe this is a moot point, since many sedevacantists believe that the Catholic bishops are outside of the Church because they are heretics?)
(I haven't had to think about sedevacantism too much or study the arguments of sedevacantists up until now, but I recently became acquainted with a sedevacantist through FB. I am not sure how to proceed with that relationship.)
Some Sedevantists:
SSPV
Aquinas Catholic Website
Gerry Matatics
Traditional Latin Mass Resources
Responses:
SSPX - Sedevacantism
Dominique Boulet, SSPX
Concerning a Sedevacantist Thesis
Br. André Marie of St. Benedict Center
CAI
