I don't know that much about Mormonism, but isn't it possible that there are multiple different sects of it, just like there are multiple sects of conventional Christianity, Judaism, Wicca, etc. ? In this case, each member of a sect would see himself as the One True Mormon (tm), and would be technically correct, despite believing in different things than members of other sects.
Mormonism is much more structured then that. There are different sects but those sects are different churches, both of us come from the LDS church, which is the largest and the one that everyone thinks of when they say Mormon (unless they are thinking of the polygamous FLDS).
There are those that call themselves New Order Mormons which are within the LDS church, by which they mean they don't believe in any of the truth claims of the church but like the culture (or something like that, I am sure I am taking what they say out of its "rich contextual setting").
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A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Note from orthonormal: MBlume and other contributors wrote the original version of this welcome post, and I've edited it a fair bit. If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post. Finally, once this gets past 500 comments, anyone is welcome to copy and edit this intro to start the next welcome thread.