The 4 Legs of Roman Catholicism. By Zeke Flores.
Here's a skeleton outline titled "The 4 Legs of Catholicism." The premise is that though there are many facets of doctrine that Catholics share with the denominational world at large, there are some that are peculiar to Catholicism only and form the "legs" on which the table of the religion rests. Disproving each doctrine is like cutting of a leg of the table, eventually it will fall.