Purgatory is clear
just off the top of my head, and several prophecies of Christ are very clear, there are other doctrines clarified and clearly mentioned but I feel sure those who don't accept the entire Bible will just dismiss those things as unimportant.
Of course, they're not, if for other reason than a great many lies about what the Catholic Church teaches are based on claiming that those two doctrines and others were fabricated and not based on Scripture.
The fact that Catholic doctrines are based on Scripture is something a good many folks refuse to believe and they're aided in their attacks on the Catholic Church by their denial that those books are an inspired portion of the Bible. Given the fact that a great many people accept the doctrine of Scripture Alone, it's always interesting to me to see people argue that tossing out a portion of Scripture, even if it were all poetry, makes no difference.
have a nice day
You still didn't make the IMPORTANCE of these things clear to me.
Fine. Provide the Scripture to support them, clearly.