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You said the teaching of LG was "an entirely novel ecclesiology," which I proved it was not by quoting manuals published before Vatican II was convened.  You also claimed LG's teaching was heretical, which is equally false. If it was heretical, the manuals I cited, and dozens of other I could cite that teach the same, never would have received an imprimatur. 

That being said, the infallibility of the entire magisterium - the body and head - was implicitly defined at Vatican I, as Salaverri noted in the quote I posted.

Have you ever heard of the infallibility of the ordinary and universal magisterium?  That is the infallibility of the college of bishop united with the Pope dispersed throughout the world.  It is de fide that the magistrium, when dispersed, can infallibly propose a doctrine that demands the assent of divine and Catholic Faith (which is the assent owed to a doctrine infallibly proposed as revealed), even if the doctrine in question has never been solemnly defined by a Pope or council.  In other words, there are three organs of infallibility: 1) The Pope alone, 2) The body of bishops gathered with the Pope at a council, and 3) The body of bishops united to the Pope when dispersed in their own diocese.  When the latter teaches infallibly, it is an act of the ordinary and universal Magisterium, which proves that the entire teaching Church is a subject of infallibility.  That is what Vatican I is referring to in the following teaching:


"Further, by divine and Catholic faith, all those things must be believed which are contained in the written word of God and in tradition, and those which are proposed by the Church, either in a solemn pronouncement or in her ordinary and universal teaching power, to be believed as divinely revealed." De Filius).

The same was taught by Pius IX three years earlier in Tuas Libentur:

Lastly, in the Oath Against Modernism we read:

"I firmly hold, then, and shall hold to my dying breath the belief of the Fathers in the charism of truth (i.e., infallibility), which certainly is, was, and always will be in the succession of the episcopacy from the apostles." (Oath Against Modernism)

Notice, it doesn't merely say the charism of truth will always be in the teaching office of the successor of Peter; it says it will "always will be in the succession of the episcopate from the apostles," otherwise known as the episcopal college.

Not only is the teaching in question from LG not a novelty, and not heresy, as you claimed, but your rejection of it is heretical, since it constitutes a denial of the infallibility of the ordinary and universal Magisterium.

You have still not done what I asked. I would hope that when you realize there is no other pre-V2 Church teaching that says what LG says, and that LG 25.2 is one of those "new doctrines" (heresy) V1 was talking about, that you would  come back here and say that. 

Your idea of what the Church's Magisterium is, is also NO. Funny that since you quote from Tuas Libenter where Pope Pius IX beautifully explains what the Church's Magisterium is - which, as Pope Pius XI taught, is always immune from error, unlike humans. 

Unless one understands these things as the Church teaches and explains them vs what some theology manuals teach, one will end up understanding that all the bishops in unison with the pope are infallible whenever they teach the new religion, which is exactly what was used on the pre-V2 faithful to help get them to abandon the true faith for the new faith - to get them to reject their religious obligation, to no longer persevere in the faith. That NO doctrine dictates that no matter what, we are bound to follow whatever the popes and bishops say because after all, they are always infallible - which is a lie.  

 

You have still not done what I asked. I would hope that when you realize there is no other pre-V2 Church teaching that says what LG says, and that LG 25.2 is one of those "new doctrines" (heresy) V1 was talking about, that you would  come back here and say that. 

Your idea of what the Church's Magisterium is, is also NO. Funny that since you quote from Tuas Libenter where Pope Pius IX beautifully explains what the Church's Magisterium is - which, as Pope Pius XI taught, is always immune from error, unlike humans. 

Unless one understands these things as the Church teaches and explains them vs what some theology manuals teach, one will end up understanding that all the bishops in unison with the pope are infallible whenever they teach the new religion, which is exactly what was used on the pre-V2 faithful to help get them to abandon the true faith for the new faith - to get them to reject their religious obligation, to no longer persevere in the faith. That NO doctrine dictates that no matter what, we are bound to follow whatever the popes and bishops say because after all, they are always infallible - which is a lie. 

 

Stubborn, SPelli is correct about the Ordinary and Universal Magisterium. Read Footnote #40 in the Lumen Gentium quote that you provided.

Here is your original quote from Lumen Gentium again:

Although the individual bishops do not enjoy the prerogative of infallibility, they nevertheless proclaim Christ's doctrine infallibly whenever, even though dispersed through the world, but still maintaining the bond of communion among themselves and with the successor of Peter, and authentically teaching matters of faith and morals, they are in agreement on one position as definitively to be held.(40*) This is even more clearly verified when, gathered together in an ecuмenical council, they are teachers and judges of faith and morals for the universal Church, whose definitions must be adhered to with the submission of faith.(41*)

Here is the text of Footnote 40 in Lumen Gentium:

(40) Cfr. Conc. Vat. I, Const. dogm. Dei Filius, 3: Denz. 1712l (3011). Cfr. nota adiecta ad Schema I de Eccl. (desumpta ex.S. Rob. Bellarmino): Mansi 51, I 579 C, necnon Schema reformatum I Const. II de Ecclesia Christi, cuм I commentario Kleutgen: Mansi 53, 313 AB. Pius IX, Epist. Tuas libener: Denz. 1683 (2879).


The Ordinary and Universal Magisterium is also referenced in 1917 Canon 1323:

Canon 1323
§1. With the divine and catholic faith all those things are to be believed which are contained in the written or handed down word of God and which are proposed to be believed by the Church, either by solemn judgment or by ordinary and universal teaching, as divinely revealed.
  §2. It is proper both for the Ecuмenical Council and for the Roman Pontiff, speaking from the chair, to pronounce a judgment of this kind.
  §3. Nothing is understood as being dogmatically declared or defined, unless it is clearly established.

   

Canon 1323 
§1. Fide divina et catholica ea omnia credenda sunt quae verbo Dei scripto vel tradito continentur et ab Ecclesia sive sollemni iudicio sive ordinario et universali magisterio tanquam divinitus revelata credenda proponuntur.
 §2. Sollemne huiusmodi iudicium pronuntiare proprium est tum Oecuмenici Concilii tum Romani Pontificis ex cathedra loquentis.
 §3. Declarata seu definita dogmatice res nulla intelligitur, nisi id manifeste constiterit.