A Catholic can be a Feeneyite and also affirm CCC 847-848 : CDF Secretaries error can be read on line

It needs to be clarified that when the Letter of the Holy Office 1939(LOHO) states ,'Therefore, that one may obtain eternal salvation, it is not always required that he be incorporated into the Church actually as a member', it means this only in a hypothetical and speculative sense.It can only be understood in a hypothetical sense. It is a possibility known only to God.
Since literally there are no such exceptions. So practically every one needs to enter the Catholic Church for salvation.

So when the Secretaries of the Congregation for the Doctrine of the Faith(CDF) interpreted CCC 847-848 as referring to literal exceptions to the dogma extra ecclesiam nulla salus (EENS), they made a factual mistake. Their correspondence can be read on line.

Neither does CCC 847-848 contradict CCC 846 ( Outside the Church No Salvation).So a Catholic can be a Feeneyite and also affirm CCC 847-848.

-Lionel Andrades