I was being sarcastic, while trying to prove a point.
sspx.org/sspx_faqs/q6_vaticanII.htm
The Council itself both encouraged liberal trends (and its encouragement became post-conciliar Vatican policy) and departed from traditional Catholic teaching, but it has no authority for either (PRINCIPLE 5).
Our position must be:
…we refuse …to follow the Rome of neo-Modernist and neo-Protestant tendencies which became clearly manifest during the Second Vatican Council and, after the Council, in all the reforms which issued from it. (Declaration of Archbishop Lefebvre, APPENDIX I)
And it is neo-Modernist tendencies that the Council is all about ("…Pope John Paull II makes not Holy Scripture, but rather Assisi, the shibboleth for the current understanding of the Council." Pope John Paul II’s Theological Journey to the Prayer Meeting of Religions in Assisi, Part I, p. 46 [APPENDIX II]).
BUT WASN’T THE COUNCIL INFALLIBLE?
Not by reason of the extraordinary magisterium, for it refused to define anything. Pope Paul VI himself, in an audience on January 12, 1966, said that it “had avoided proclaiming in an extraordinary manner dogmas affected by the mark of infallibility” (Cf. the declaration of the Theological Commission of Mar. 6, 1964, and repeated by the Council’s General Secretary on Nov. 16, 1964: “In view of conciliar practice and the pastoral purpose of the present Council, this sacred Synod defines matters of faith or morals as binding on the Church only when the Synod itself openly declares so.” It never did.).
Nor by reason of the ordinary universal magisterium, because this is not a defining power, but one of passing on what was always believed. The “universality” in question is not just one of place (all bishops) but also of time (always) (cf., Vatican I and PRINCIPLE 6).
Nor even by reason of the simply authentic magisterium, because the object of all magisterium is the deposit of faith to be guarded sacredly and expounded faithfully (Vatican I, Dz 1836), and not to adopt as Catholic doctrine the “best expressed values of two centuries of ‘liberal culture,’” even if they are “purified” (Cardinal Ratzinger, Gesu, Nov. 1984, p. 72. Cf. Gaudium et Spes, §§11, 44).