In the span of just a few days, two well-known Catholics publicly gave what I maintain are erroneous conclusions regarding whether or not SSPX Masses fulfill the Sunday obligation. On September 18, 2024, in an interview with Gene Zannetti, Fr. Chad Ripperger stated that SSPX Masses fulfill the obligation. And on September 21, 2024, in an article by Daniel Payne for Catholic News Agency (about the Carmelite nuns who defected to the SSPX), Jimmy Akin of Catholic Answers is also quoted as suggesting that SSPX Masses fulfill the obligation (because he says Catholics can attend their Masses and receive Holy Communion). As I will demonstrate in this article, both statements fall short of a proper understanding of canon law, which lead to the erroneous conclusion. Note that I already addressed this issue at length in my November 2021 article “Do SSPX Masses Fulfill the Sunday Obligation?” (this previous article also analyzes all the negative judgments by the Holy See regarding SS...