http://sedevacantist.com/essayonheresy.htmhttp://sedevacantist.com/pertinacity.htmlApplication of these Terms to Heresy
With regard to the sin of heresy, it was said that the matter was the intellectual error involved in assenting to a heterodox proposition, while the form was the obstinate attachment of the will. And once again this distinction usefully clarified the fact that one who assents to a heterodox proposition by inadvertence, without obstinate attachment of the will, was not guilty of the sin of heresy.
What muddied the waters was the misleading linguistic development by which material heresy was said to make the person professing it a material heretic. No conclusion could seem more natural to the layman, but it does not in fact follow in logic. A retired lion-trainer is not, after all, a man who trains retired lions! And a serious problem arises when one designates as a material heretic anyone who assents, without moral guilt, to a heretical proposition. The first is that you have created a category which comprises two quite distinct sorts of member and you therefore run the risk of confusing the two. For according to that definition, a good Catholic who inadvertently holds a condemned doctrine, not realising that it is condemned is a material heretic. And so too is a Protestant if he is invincibly ignorant of the Church's status. And while it is true that there is a resemblance between the two cases (for both indeed hold in their minds unorthodox doctrine and neither is culpable in the eyes of God for doing so), nevertheless there is also a huge gulf between them. For the former is a Catholic, habitually adhering to the Catholic rule of faith, whereas the latter is a non-Catholic, with no knowledge of the correct rule of faith and tossed about on the treacherous sea of private opinion.
The inevitable consequence of this misleading assimilation of two such different sorts of person is that they will gradually come to be considered truly alike. This could happen in either of two ways. Mistaken Catholics could be regarded as no better than Protestants in good faith (and some “hard-liners” have practically taken this view, arguing that the most innocent error creates a presumption of heretical animus - a notion we have already seen to be false). More common has been the no less calamitous view that a Protestant, if invincibly ignorant of the status of the Church, is no worse off than a Catholic who inadvertently makes an incorrect doctrinal statement - as though adherence to the Catholic rule of faith, i.e. submission to the Magisterium, were irrelevant, whereas in fact it is what juridical membership of the Church depends on.
Correctly, the material element involved in being a heretic is conscious dissent from the Catholic rule of faith, while the formal element is the perverse state of the will which this entails. The distinction thus made, a Catholic who inculpably advances a heretical proposition by inadvertence may perhaps be said to have advanced a material heresy; but he cannot be called a material heretic. He is not a heretic in any sense. A heretic is one who dissents altogether from the Catholic rule of faith, and he will be called a material heretic if he is invincibly ignorant of the authority of the Church which he rejects, and a formal heretic if the Church's authority has been sufficiently proposed to him, so that his dissent from it is culpable. (This is clearly explained by Cardinal Billot: De Ecclesia Christi, ed. 4, pp. 289-290)
So according to the correct usage of the term, as outlined above, a Catholic can never become a material heretic. He is not invincibly ignorant of the Church's authority, and any conscious dissent from her teachings will therefore make him a formal heretic. Material heretics are exclusively those baptised non-Catholics who err in good faith. That is why Dr Ludwig Ott notes that “public heretics, even those who err in good faith (material heretics), do not belong to the body of the Church, that is to the legal commonwealth of the Church. (Fundamentals of Catholic Dogma, p.311)And in fact Dr Ott's preferred expression - “heretics who err in good faith” is the one used in the Code of Canon Law (Canon 731), which completely eschews the potentially misleading term “material heretics”
http://sedevacantist.com/judgeheresy.htmlThis last one kind of speaks as to why SVs should not judge the recognize and resisters to be heretics as the reason why they feel forced to acknowledge public heretics as the head of their Church is
because they want to submit to the Church as all good Catholics must.
It is because of their belief in the papacy that they feel they must accept him despite everything that makes their shepherd look like a wolf. To that extant it is commendable that they defend the one they believe to be the Pope. Of course the "R and Rs" should not judge the SVs to be heretics either for defending the papacy against heretical/non-Catholic claimants.
http://sedevacantist.com/heresyhistory.html