Bishop Rene Gracida summed the situation we are in with the doubtfulness of the Pope Benedict XVI resignation: "[I]f the [Pope Benedict XVI] Renunciation is doubtful, then in virtue of canon 332 §2, it is invalid for lack of due manifestation" [ https://abyssum.org/ ] Moreover, it appears that if someone has definite solid reasons from canon law to doubt the validity of Pope Benedict XVI's resignation one can it appears possibly commit a sin if he doesn't resolve that doubt before claiming Francis is definitely pope. The important theological book "Rodriguez and the Confession of Doubtful Mortal Sins" in page 225 says: "If one does not resolve the doubt and deliberately does the action anyhow, it means that he is willing to offend God gravely, and therefore he commits a mortal sin." (Google: Theological Studies -cdn- 1 PDF by U. Adelman - Cited by 1 Related articles) Moreover, Dogmatic theology scholar Fr. Elwood Sylvester Berry (1879-195...