Hey Katzpur,
I didn't mean to ignore this question. I'm sorry. Your question is the same debate that I can have with Roman Catholics and Eastern Orthodox Christians. I can have this same debate with Muslums and Athesist too. The question we are discussing has to do with our view of Scripture (Bible). What is your view of Scripture? Do you have a high view of Scripture or a lower view? I believe in the Sufficiency of Scripture. I believe everything is tested in the light of Scripture. God tells us to examine and test all things. Since Roman Catholics, Mormons, Eastern Orthodox, and Protestants believe the Bible to be the Word of God, we have a common source to discern and judge spiritual truths.
Katzpur, in addition to our common belief in the Bible, you also believe in "prophet succession". I personally believe this LDS doctrine was copied from the Roman Catholic doctrine of "apostolic succession". I bet the Eastern Orthodox faith has a similar authority too. The Quaran and Islam are also similar to Mormonism in regards to authority and extra-biblical revelation. The LDS faith and Islam both have a prophet and angel from God to give significant revelation that changes the faith found in the Bible alone.
If we discuss things in addition to Biblical revelation, whose extra-biblical revelation should I embrace? Additional extra-biblical revelation:
1. LDS - Book of Mormon, Doctrines and Covenants, Price of Great Pearl, prophet succession, Prophet Joseph Smith, Angel Moroni.
2. Roman Catholicism: Sacred written and oral tradition, apostolic succession.
3. Islam: Quran and revelation of prophet Mohamed, angel revelation
4. Eastern Orthodox: (help James!)
5 Atheism: rejects the bible from being revelation from God.
Please let me know if you understand what I am saying. Sola Scriptura gives the Bible as the final authority as truth. However, there is no such thing as private interpretation. The Bible has one correct interpretation which is Gods interpretation. We all know in part. However, God has elected specific sinners to be adopted as His redeemed children. He gives his adopted Children the Spirit of God for spiritual discernment. God the Holy Spirit dwells in the believer and not in the religious institution. A particular religious institution does not exclusively have the Holy Spirit. Please read 1 Corinthians chapters 1 and 2. - BT