A question regarding declaring someone a disbeliever

Q: ............
If the evidence is established against him, he is declared a disbeliever. However, if he is in a country where the evidence has not reached him, his case is left to Allah; he becomes one of those in a state of ignorance (fatra). But if the Qur'an and the Sunnah have reached him, the ruling is clarified for him, and if he persists, he is a disbeliever.
Q: If the argument has not reached him?
A: If the Qur'an and the Sunnah have reached him, then the argument has reached him.