You say it is a provable lie, but in a mystery religion what the leadership declare can never be a lie. Catholicism is a mystery religion. How else can a pedophile priest turn the wine into blood that was spread upon the Mercy Seat IN HEAVEN, and the wafer into the flesh of a man who is in Heaven? The mystery is never to be questioned for it is a mystery the followers are not gifted enough to understand, so they blindly defend it regardless of what Truth is put before them.
I BOLDED the word ALL.
It can be EASILY shown that ALL of the RCC's stuff does NOT come from the Bible.