1° A pope accepted by the whole Church cannot be an antipope.
2° John XXIII and Paul VI were accepted by the whole Church.
3° Therefore they cannot be antipopes.
1° Christ promised to St. Peter that he had prayed so that his faith should not fail.
2° Obviously, this prerogative was transmited to all his successors.
3° Therefore John XXIII and Paul VI cannot have become antipopes after their election.
You see, refuting sedevacantism is simple...
The above-mentioned reasons also show the impossibility of sedeprivationism, namely the thesis of Bishop Guérard des Lauriers.
You like discussions, but you dislike the truth.