"I assumed that explanation wasn't really to the faithful, but to those outside your denomination."
Actually it was an essay written for a Dean of Studies at a Catholic seminary! (God bless his cotton socks).
I simply posted it because a person in process of conversion to Catholicism had expressed a need for some further information about the doctrine. As they come from an evangelical background like myself, I thought that it might help.
I wasn't intending to try and convert all you sola scriptura types!! ;)
Let me also add my clarification. I was working under the same assumption as xzins.
I'm a sola scriptura type, but I'm more a "sola everything that comes out of the mouth of God" type.