Okay, Steve, we can take the subjective approach if you wish, for epistemological knowledge (which I’ve yet to understand why Catholics become postmodern liberals on this issue, but I digress). You claim that my belief is subjective to my own interpretation, or it’s infallible. Epistemologically, you are no more certain than I. You claim to have a hierarchy which can interpret Scripture infallibly. That removes the interpretation question from the table. However, what is just as fallible and uncertain as you claim my interpretation of Scripture is, is your fallible certainty that the hierarchy to which you submit is infallible to begin with. Unless you want to claim that your interpretation of history, tradition, and Scripture was infallible in determining that the Roman communion is the true, infallible church of Christ, as opposed to the Orthodox, Oriental, PNCC, Old Catholic, Sedevacantist, or independent Eastern communions, which also claim to have an infallible teaching authority. If you do claim your investigation into the authenticity of the magisterium is infallible, then you are no different than the Protestant who claims his interpretation is infallible (of which I don’t know any). Since I am assuming that you don’t claim that, your certainty of the truth of Rome’s claims is just as certain as mine.
And if the division within non-Catholic churches is evidence of the insufficiency of Scripture to determine doctrine, I would assert that the division within the churches that claim to possess apostolic tradition, demonstrates the insufficiency of tradition.
I don’t reject the assertion that the church is the bride of Christ, or the pillar of truth (and I mean the church, not the hierarchy). What I reject is that the Roman Catholic Church is solely that bride.