With regard to the OP, it sounds ok without any further information because there is the certainty of faith in Christ.
The Holy Office (now Congregation for the Doctrine of the Faith) condemned the following propositions in 1679 and 1907 respectively (See Denzinger 1171 and 2025, older numbering):
Assent to faith is supernatural and useful to salvation with only the probable knowledge of revelation, even with the fear by which one fears lest God has not spoken.
The assent of faith ultimately depends on an accumulation of probabilities.
Faith is “a free assent to the whole truth that God has revealed.” (CCC 150). By faith “we believe because of the authority of God himself who reveals them, who can neither deceive nor be deceived” (CCC 156). In particular, this means faith in Christ, since Christ “is the Father’s one, perfect and unsurpassable Word. In him he has said everything; there will be no other word than this one” (CCC 65); “what he spoke before to the prophets in parts, he has now spoken all at once by giving us the All Who is His Son” (CCC 65, quoting St. John of the Cross).
But even if one has faith in Christ, deliberately denying or culpably doubting any revealed truth destroys faith altogether, since one is no longer assenting to God the revealer, but trusting one’s own judgment: “Since faith is one, it must be professed in all its purity and integrity.” (Pope Francis, Lumen Fidei 48).
On the flip side, because faith is one, if one has faith in Christ–who is the fullness of revelation–faith is not destroyed by innocent ignorance or innocent uncertainty about the various articles of faith: “there is no difference in the faith of ‘those able to discourse of it at length’ and ‘those who speak but little’, between the greater and the less: the first cannot increase the faith, nor the second diminish it.” (Lumen Fidei 47, quoting St. Irenaeus).