[Petrosius]

See the article "Great Apostasy" at Wikipedia. But if the Great Apostasy did not occur then the Church which declared the canon of Sacred Scripture can be trusted in handing down the true gospel throughout the ages until today. This historical and continuing body of teaching can only be found in the Catholic Church.

[Alex Murphy]

See the article "Great Apostasy" at Wikipedia.

Non sequitur again. Did all the Protestants get together to write and approve the contents of that article? It's telling that Mormons and Jehovah's Witnesses are lumped into the Wikipedia entry, too.

But if the Great Apostasy did not occur then the Church...can be trusted

There is apostasy, and then again there is the GREAT apostasy. Which is it? Again, non sequitur, and straw man to boot. This thread has yet to prove that the Protestant Reformation, and the reformers in particular, were prompted due to their (alleged) belief in THE "Great Apostasy".