“It's a great country: you can say whatever you like so long as it is strictly true--nobody will ever take you seriously.” ― Edward Abbey
It's a great Church History Department. Joseph and Oliver could say whatever they wanted, so long as it was strictly true--none of the historians take them seriously.
From the Wentworth letter:
The whole book exhibited many marks of antiquity in its construction and much skill in the art of engraving. With the records was found a curious instrument which the ancients called “Urim and Thummim,” which consisted of two transparent stones set in the rim of a bow fastened to a breastplate.
Through the medium of the Urim and Thummim I translated the record by the gift, and power of God....
We are informed by these records that America in ancient times has been inhabited by two distinct races of people. The first were called Jaredites and came directly from the tower of Babel. The second race came directly from the city of Jerusalem, about six hundred years before Christ. They were principally Israelites, of the descendants of Joseph. The Jaredites were destroyed about the time that the Israelites came from Jerusalem, who succeeded them in the inheritance of the country. The principal nation of the second race fell in battle towards the close of the fourth century. The remnant are the Indians that now inhabit this country.