Is the Pope a heretic? should sound like the beginning of a bad joke, but is a charge that has been made by a group of level-headed theologians. I was a bit taken aback by the claim, and thought a good place to find an answer is the current Code of Canon Law, which describes heresy as the obstinate denial or obstinate doubt after the reception of baptism of some truth which is to be believed by divine and Catholic faith.
Heresy, at its root, is an interior disposition of the mind and will, the holding of a false proposition, one

Praise the Lord