This is another piece of evidence to keep in mind when approaching all the other facts.
The Book of Mormon is by no means a short book at 269,510 words. Using a series of “anchor” dates, the historical record indicates that the translation was completed in a period of around 60 working days. This means if Joseph had spent every day working on the book, he would have produced it in just a couple of months.
Is this what we would expect from 23-year-old Joseph Smith when we consider the complexity of the book?
This rapid translation is a problem for alternative theories for the Book of Mormon’s origin as it would require Joseph having memorized around 10 pages of the book each day before translation. It would be much less impressive if Joseph had dictated the book over a much longer period of time, in which case he would only need to memorize just a few paragraphs a day.
So how did Joseph manage to do it unless the book was inspired?