There aren't many [reasons for excommunication], really. Flat out saying Joseph Smith was a liar, I think, yeah, there's no reason for you to be a Latter‑day Saint. ... It gets a little fuzzier after that. Advocating a nonhistorical Book of Mormon, for example, advocating it in the church, I'd probably say you can't do that. If you believe it privately, that's your business. ... If they're not talking about it, if they're not advocating it, then I would say leave them alone. Work with them, if nothing else, but leave them alone. So I don't see a really clear line there. Obviously there's no room in the church for, say, a vibrant Mormon atheist movement or something like that. ...