I gotta tell you that if you write a book claiming all the things the B[ook of ]M[ormon] claims and none of the claims outside the church founded by the author of the BM can be substantiated, the validity of the document is very suspect. This is down right fiction. Only a charlatan, liar, fraud, maniac or demon would write a book claim it to be a revelation of G-d and not be able to prove anything in the book.