Will wonders never cease?  Mr. Sorensen has written something entirely reasonable and factual.  He said "What we should know for a certainty is this. Once you take a position and defend it publicly, it is almost impossible to admit you are wrong and "repent" and change your mind."

This is true with individuals.  It is even "more true" with religious bodies.  Once a religious institution (Protestant, Catholic, Seventh-day Adventist, etc.) makes a pronouncement about "The Truth," writes it down, defends it for years and years and centuries, etc. in public, it is almost impossible for that religious body to admit that they made a mistake at the beginning when someone thought up such a bright theological idea.  

IMHO, like those who created some early Roman Catholic theology, those who created early Adventist theology made very some poor choices.  Trying now to correct things like the Investigative Judgement doctrine is now almost impossible.