* Do you believe that Sedevacantism is a dogma of the Faith? When was it added to the Deposit of the Faith? What authority added it?
Sedevacantism is not a dogma. It is a judgment of the status of men claiming to be pope who are publicly profession heresy and grave errors against the Faith. As I mentioned above, Archbishop Lefebvre believed such a judgment was possible prior to the judgment of the Church, and he was forming this view based on the Code. St Robert Bellarmine and the majority of theologians who have written on the case of a heretical pope all say that he would lose his office prior to a declaration.
As Catholics we are recognizing a fact, we are not creating a dogma.
If you came home one night and saw a prominent member of your town dressed in black, climbing out a window of your home with a crowbar in one hand, and a bag full of money and other valuables in his other hand. You yell at him to stop, he drops the bag, and flees. There is no evidence except you testimony, as he wore gloves.
The police arrest him, but the town is divided. Many say, he would never do that, you are mistaken, etc. Do these people have to believe you? It is your word against his. One thing that cannot be denied is that you are certain of what you saw regardless of whether anyone believes you. The truth in this instance binds you, but not others.
Many Catholics have very carefully looked at the evidence of the public crime of heresy committed by Paul VI and his successors. Many of us, myself included wish that there was some innocent way of explaining this. We have seen the evidence of what these men have done. We have formed the judgment that these men could not have been popes, but the judgments binds no one else to it. We have no authority in the Church.
Some books providing evidence that I have read:
1. Peter Lovest Thou Me? Fr. Daniel Le Roux
http://www.carmel-books.org/peter-lovest-thou-me-p-986.html2. Iota Unum, Romano Amerio
http://www.amazon.com/gp/product/0963903217/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=0963903217&linkCode=as2&tag=httpwwwchanco-203. John Paul II's Theological Journey, all volumes, Fr. Dormann
http://www.amazon.com/gp/product/0935952527/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=0935952527&linkCode=as2&tag=httpwwwchanco-204. The Books of Accusation of Heresy against Paul VI, John Paul II, and the Alleged Catechism of the Catholic Church, Fr. George's de Nantes.
http://www.crc-internet.org/1097-books-of-accusation.html5. Paul VI Beatified, Fr Villa
http://www.padrepioandchiesaviva.com/uploads/Paul_VI.._beatified_english.pdfI could continue but all that I have presented already is very strong evidence of public heresy.