It is always useful to define the term. If a had a quarter for each time the distinction between the schism, which we technically have with the Orthodox (although it is discouraged to use such harsh a term), and heresy, of which we accuse the Reformers, is muddled up, I'd be a rich man.
When I asked him for advice, he was blunt, compassionate, and so very wise. A great man and priest.
Father Hardon knew that in the Eucharist there is TRUTH in all things.
He did not worry about being politically correct-so to speak