Definition of interpret
transitive verb1 : to explain or tell the meaning of : present in understandable terms
So I think what Stubborn means is that the literal meaning of a dogma is not to be counted as an interpretation because it is already clearly stated and doesn't need any further interpretation. For example, EENS is very clear. Everyone understands the meaning of it. So that's why defenders of EENS get upset when they hear people say that you have to interpret it according to how the Church understands it. As if the Church's magisterium could teach a dogma that wasn't clear in its literal meaning (defeating the purpose of defining dogmas in the first place).
Everyone understands the meaning of EENS except the Feeneyite heretics. Here's part of what the Holy Office wrote against the Lutheran heretic, Fr. Feeney, who, like his predecessor in heresy, relied on his private judgment to determine what he will and will not believe:1949 Holy Office Letter against the Errors of Fr. Feeney: “Now, among the commandments of Christ, that one holds not the least place by which we are commanded to be incorporated by baptism into the Mystical Body of Christ, which is the Church, and to remain united to Christ and to His Vicar, through whom He Himself in a visible manner governs the Church on earth. Therefore, no one will be saved who, knowing the Church to have been divinely established by Christ, nevertheless refuses to submit to the Church or withholds obedience from the Roman Pontiff, the Vicar of Christ on earth.“Not only did the Savior command that all nations should enter the Church, but He also decreed the Church to be a means of salvation without which no one can enter the kingdom of eternal glory.
"In His infinite mercy God has willed that the effects, necessary for one to be saved, of those helps to salvation which are directed toward man's final end, not by intrinsic necessity, but only by divine institution, can also be obtained in certain circuмstances when those helps are used only in desire and longing. This we see clearly stated in the Sacred Council of Trent, both in reference to the sacrament of regeneration and in reference to the sacrament of penance (<Denzinger>, nn. 797, 807).
“The same in its own degree must be asserted of the Church, in as far as she is the general help to salvation. Therefore, that one may obtain eternal salvation, it is not always required that he be incorporated into the Church actually as a member, but it is necessary that at least he be united to her by desire and longing.
“However, this desire need not always be explicit, as it is in catechumens; but when a person is involved in invincible ignorance God accepts also an implicit desire, so called because it is included in that good disposition of soul whereby a person wishes his will to be conformed to the will of God.
“These things are clearly taught in that dogmatic letter which was issued by the Sovereign Pontiff, Pope Pius XII, on June 29, 1943, <On the Mystical Body of Jesus Christ> (AAS, Vol. 35, an. 1943, p. 193 ff.). For in this letter the Sovereign Pontiff clearly distinguishes between those who are actually incorporated into the Church as members, and those who are united to the Church only by desire.
"Discussing the members of which the Mystical Body is-composed here on earth, the same august Pontiff says: "Actually only those are to be included as members of the Church who have been baptized and profess the true faith, and who have not been so unfortunate as to separate themselves from the unity of the Body, or been excluded by legitimate authority for grave faults committed."
"Toward the end of this same encyclical letter, when most affectionately inviting to unity those who do not belong to the body of the Catholic Church, he mentions those who "are related to the Mystical Body of the Redeemer by a certain unconscious yearning and desire," and these he by no means excludes from eternal salvation, but on the other hand states that they are in a condition "in which they cannot be sure of their salvation" since "they still remain deprived of those many heavenly gifts and helps which can only be enjoyed in the Catholic Church" (AAS, 1. c., p. 243). With these wise words he reproves both those who exclude from eternal salvation all united to the Church only by implicit desire, and those who falsely assert that men can be saved equally well in every religion (cf. Pope Pius IX, Allocution, <Singulari quadam>, in <Denzinger>, n. 1641 ff.; also Pope Pius IX in the encyclical letter, <Quanto conficiamur moerore>, in <Denzinger>, n. 1677).”