The Book of Mormon mentions horses, which is bad news for, well, the Book of Mormom.
You see, horses are an old world mammal, introduced to North America by Spainards. They would not have been here in the fourth century, which is when (and where) the prophet Mormon, compiled the book, as asserted by the book itself.
What to do? What to do?
Luckily, Haredi Mormons have found the answer.