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The argument, at least so far as I can make sense of it, is not that those people are saved "outside" the Church (since dogmatically that's impossible) but that in some way those people, if they are in fact saved, are somehow inside the Church despite not being formal members of it.  If I understand you and Pax correctly, you would consider such speculation to be heretical, even though its possible to frame it in a manner that doesn't conflict with the dogma per se.

But lest some should, without reason, and for the perversion of what we teach, maintain that we say that Christ was born one hundred and fifty years ago under Cyrenius, and subsequently, in the time of Pontius Pilate, taught what we say He taught; and should cry out against us as though all men who were born before Him were irresponsible — let us anticipate and solve the difficulty. We have been taught that Christ is the first-born of God, and we have declared above that He is the Word of whom every race of men were partakers; and those who lived reasonably are Christians, even though they have been thought atheists; as, among the Greeks, Socrates and Heraclitus, and men like them; and among the barbarians, Abraham, and Ananias, and Azarias, and Misael, and Elias, and many others whose actions and names we now decline to recount, because we knowit would be tedious. So that even they who lived before Christ, and lived without reason, were wicked and hostile to Christ, and slew those who lived reasonably. But who, through the power of the Word, according to the will of God the Father and Lord of all, He was born of a virgin as a man, and was named Jesus, and was crucified, and died, and rose again, and ascended into heaven, an intelligent man will be able to comprehend from what has been already so largely said. And we, since the proof of this subject is less needful now, will pass for the present to the proof of those things which are urgent.

[color=rgba(0, 0, 0, 0.87)]1. The Apostle Paul has said: A man that is an heretic after the first and second admonition reject, knowing that he that is such is subverted and sins, being condemned of himself. Titus 3:10-11 But though the doctrine which men hold be false and perverse, if they do not maintain it with passionate obstinacy, especially when they have not devised it by the rashness of their own presumption, but have accepted it from parents who had been misguided and had fallen into error, and if they are with anxiety seeking the truth, and are prepared to be set right when they have found it, such men are not to be counted heretics. Were it not that I believe you to be such, perhaps I would not write to you. And yet even in the case of a heretic, however puffed up with odious conceit, and insane through the obstinacy of his wicked resistance to truth, although we warn others to avoid him, so that he may not deceive the weak and inexperienced, we do not refuse to strive by every means in our power for his correction. On this ground I wrote even to some of the chief of the Donatists, not indeed letters of communion, which on account of their perversity they have long ceased to receive from the undivided Catholic Church which is spread throughout the world, but letters of a private kind, such as we may send even to pagans. These letters, however, though they have sometimes read them, they have not been willing, or perhaps it is more probable, have not been able, to answer. In these cases, it seems to me that I have discharged the obligation laid on me by that love which the Holy Spirit teaches us to render, not only to our own, but to all, saying by the apostle: The Lord make you to increase and abound in love one toward another, and toward all men. 1 Thessalonians 3:12 In another place we are warned that those who are of a different opinion from us must be corrected with meekness, if God perhaps will give them repentance to the acknowledging of the truth, and that they may recover themselves out of the snare of the devil, who are taken captive by him at his will. 2 Timothy 2:25-26[/color]

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[color=rgba(0, 0, 0, 0.87)]2. I have said these things by way of preface, lest any one should think, because you are not of our communion, that I have been influenced by forwardness rather than consideration in sending this letter, and in desiring thus to confer with you regarding the welfare of the soul; though I believe that, if I were writing to you about an affair of property, or the settlement of some dispute about money, no one would find fault with me. So precious is this world in the esteem of men, and so small is the value which they set upon themselves! This letter, therefore, shall be a witness in my vindication at the bar of God, who knows the spirit in which I write, and who has said: Blessed are the peacemakers: for they shall be called the sons of God. Matthew 5:9[/color]

I've cited Augustine's Letter 43 several times, regarding the Donatists (not relevant to BOD 'cause they were baptized and trinitarian, but seemingly relevant to the Protestantism issue).