Mary wrote:It is more likely that the Book of Mormon was filtered through Joseph's brain and so would naturally have included his prejudices and experiences. This would seem to me to most likely explain away all the anachronisms despite various accounts that would suggest the contrary.
Please excuse me, but I really do not see on what basis you feel entitled to say that "it is more likely" that the translation was delivered (if it was 'delivered' at all rather than manufactured) in a way that allowed Joseph Smith's personal prejudices to condition it.
A substantial group of the earliest witnesses give accounts of a quite different nature, stating that Smith read off the words he dictated from what he saw when he looked at the rocks in his hat. That group includes David Whitmer, Martin Harris, Joseph Knight, and William Smith. Though not all give details as full as these witnesses, all early testimony is consistent with what they describe:
http://www.mormonthink.com/transbomweb. ... djosephsay
You could have said "I am more comfortable with the idea that the Book of Mormon was filtered through Joseph's brain". But that does not make your view more likely, given the evidence against it.