[rjsimmon]

Papal Infallibility as you understand it? Or as the Church understands it?

I undersand how the Roman Catholic Church understands AND professes it.

Sale of Indulgences as you understand it happened? Or what really happened?

So, you were there?

[Petronski]

I understand how the Catholic Church understands AND professes it.

I doubt it.

If your understanding of Immaculate Conception is any guide, you probably have a very contorted understanding of it.