Moroni 10:4-5 says,
“And when ye shall receive these things, I would exhort you that ye would ask God, the Eternal Father, in the name of Christ, if these things are not true; and if ye shall ask with a sincere heart, with real intent, having faith in Christ, he will manifest the truth of it unto you, by the power of the Holy Ghost. And by the power of the Holy Ghost ye may know the truth of all things.”
The test is a form of circular reasoning. The conclusion is presumed before the investigation begins. A negative answer is not possible unless the person is not sincere. A person who does not receive a testimony, or who has a negative testimony, is often instructed to read the book and pray again. But is this the right way to test for truth?
Lastly, this is not the biblical means for examining a teaching. Acts 17:11 says, “Now these Jews were more noble than those in Thessalonica; they received the word with all eagerness, examining the Scriptures daily to see if these things were so” (ESV). Notice that the Bible commends these Jews because they examined Paul’s teachings in the light of what they knew God had already said to determine if Paul was bringing the truth. We are never told to determine truth by a subjective experience because the possibility of being deceived is too great.