'nough said.
"Indomitable Ignorance" is the result of a letter of Pius IX. It is not dogma nor doctrine.
The Council of Trent said we must have Supernatural Faith to be justified, and justification is salvation.
Supernatural Faith is belief in the Messiah which must come through hearing, as per St Paul.
The Holy Ghost does not operate apart from Our Lord Jesus Christ.
Unbaptized babies go to limbo.
One cannot "graduate" from limbo to heaven with good works.
Therefore, the "good pagan" theory is absurd.
Pope Leo said that "There is no salvation outside the church, and any further speculation is unlawful."
So why all the hot air?