So I came across something in the gospel doctrine manual for this year that I thought was interesting (they're teaching church history if you were curious). In lesson 6 titled: I Will Tell You in Your Mind and in Your Heart, by the Holy Ghost" this is what it actually says in one part:
Explain that it is important for us to discern whether a revelation is truly from God. Sometimes what we think is a revelation may be a projection of our own desires. And sometimes false revelations may come from Satan.
It then goes on to share a quote from James R Clark where in one part he says:
When...inspiration conveys something out of harmony with the accepted revelations of the Church or contrary to the decisions of its constituted authorities, Latter-day Saints may know that it is not of God, no matter how plausible it may appear.
So basically if you feel the promptings of the Holy Ghost but it goes against the dogma they're spewing at you, it's not REALLY from the Holy Ghost. Only when it agrees with what you've been told is it from God. How can any rational person not read that without seeing the fundamental flaw in that argument? They're basically agreeing that it's possible to be duped into thinking you had a spiritual experience from God they just don't take the logical next step.
The authors of religioustolerance.org actually performed a small study investigating whether people could assess the will of God through prayer, specifically whether God approved or disapproved of same-sex marriage.
There were both conservative and liberal participants. Many felt that they received an answer from God in prayer. Some answers were in favor of same-sex marriage, others were against... but God seemed to agree with everyone: not one participant was told that their prior beliefs were wrong!
(I recommend religioustolerance.org to many people. Its staff is a small group of volunteers from Canada and the US, some theist, some not. They aim to report fairly on many different belief systems, and their intersection with "hot" social and political issues. While they accept beliefs for what they are, they don't give anyone a free pass for hurtful or discriminatory actions, such as oppression of women or special rights for heterosexuals.)
The Rev. Jim Huber's description of how he came to "mystic atheism" might also be worth a look. He recalls feeling God's presence...
I asked if I was speaking with God. I got the answer "Yes". I asked how I could know it was really God. I knew, in a way that those of you who haven't had a similar experience just can't understand. I asked if He was my Creator. I got the answer "Yes". I asked if the creation account in the Bible was correct. Have you ever heard God laugh? I did. It was a deep, good-natured laugh that made it clear that the Bible was not correct in this regard. [...]
I asked if He existed. He said "No." Thinking I might know the answer to this paradox I asked if I should believe in him anyway. He said "No", not the answer I expected.