And in the one in Singulari Quidem he seems to be teaching salvation by default by invincible ignorance.
It seems that way to you because it suits your purposes.
First off, Singulari Quidem is a fallible docuмent, it is not an infallible decree.
Ah the old "it's not infallible" canard.
Oh so since it's "not infallible" it can be
HERETICAL? Anything goes since "it's not infallible"?
That argument is riddled with ignorance and its completely false and Protestant.
Non-sedevacantists and the Dimonds are the ones who use that.
Singulari Quidem is an ENCYCLICAL, and they demand assent, as Pius XII said in Humani Generis i believe.
Or maybe you believe Pius XII was wrong there as well?
Secondly, Pius IX does not explain how the person can be saved, what he needs to do and learn. For someone to disregard all the dogmatic decrees on EENS and in their place use this fallible, ambiguous, incomplete docuмent, most certainly would indicate that they are choosing the texts and interpreting them to suit their pre-conceived ideas.
For there shall be a time, when they will not endure sound doctrine; but, according to their own desires, they will heap to themselves teachers, having itching ears (2 Tim 4:3)
Ok so the Pope, the teacher of all Christians, writes an Encyclical and what he says about invincible ignorance is flat-out wrong and needs to be resisted.
Even if he had explained how such a person is saved, isn't that still heretical? He says there is an EXCEPTION to hope for life and salvation OUTSIDE the Church.
What does this all mean except that there is salvation OUTSIDE the Church?