Meriweather
If LDS are right about the Great Apostasy, it disproves the Catholic Church. But if Catholics are right about it, it disproves the LDS church.
www.catholic.com
Excerpt:
That as friendly as Mormons are, you have to grapple with the fact that the claim about The Great Apostasy is Catholicism, Protestantism, Orthodoxy, Coptic Christianity, you name it. Every form of Christianity on earth between pretty much the death of the apostles and the time of Joseph Smith, all of them are evil and abominable.
Those early Christians being martyred by the Romans for being Christians, those guys were only pretending to be Christians. They only thought they were. They weren’t true Christians. That’s the heart of Joseph Smith’s claim.
Now, on the LDS website, Church of Jesus Christ of Latter-day Saints, they have a topics in questions section, which is very helpful. In their section on apostasy, they give the basic argument.
They say, we live in a time when the Gospel of Jesus Christ has been restored. Excuse me. But unlike the church in times past, the church of Jesus Christ of Latter-day Saints will not be overcome by general apostasy. The scriptures teach that the church will never again be destroyed. Now, they point to two sources here. One of those is doctrines and covenants, which only they have.