The nature of these fabrications range from those based upon half truth, twisted and falsely painted, to those which are out and out obvious lies, which only gain any credibility because they come in such numbers aided by the half truths. And so they too seem to stand as also being true leaning upon and stacked in with the half truths. To the end of exposing these 'liars' generally, a set of examples of such 'criticisms' so presented as 'true' will be given to show exactly how they are based in 'half truths' and are twisted and painted to slander the LDS Church, and are then used to couch other more obvious lies within in order to give them apparent veracity.
Full truth one: George Reynolds, an early LDS Church Seventy and Book of Mormon scholar attempted to construct a time chronology for the events of the Book of Mormon. That Book of Mormon chronology was published and later under a later church compilation of the Book of Mormon under the direction of Apostle James E. Talmage, that chonology is fitted within the Book of Mormon as footnoted suggested 'possible' dates to the Book of Mormon itself. And they still appear in the latest version of the Book of Mormon today as part of the summary chapter headings, 'BUT' they never were a part of the original inspired Book of Mormon transaltion by Joseph Smith.
Full truth two: Nephi in the Book of Mormon, 1 Nephi 7:14, does reference that even 'Jeremiah have they cast into prison'. Another early LDS authority and Book of Mormon scholar, Apostle Orson Pratt, cross referenced this statement of Nephi to Jeremiah 37:15 in his cross references of the Bible and the Book of Mormon which still exists in today's Book of Mormon. Most good Bible scholars sort out the chronologically the mixed up chapters of Jeremiah and place Jeremiah's imprisonment of the 37th chapter of Jeremiah in the 8/9th year of King Zedekiah's reign. And now his correlates with the year 592 BC of the Book of Mormon and causes a man created Book of Mormon anachonism to be in exsistance between Orson Pratt's cross reference and George Reynold's suggested chronology. That is, Nephi is retrieving the family of Ishmael at one location while building a ship at another location at the same time, about 592 BC. But this is only due to the deductions of men, George Reynold's suggested Book of Mormon time line, Orson Pratts suggested cross reference and Biblical scholar's dating of Jeremiah's imprisionment; none of which are a part of the original Joseph Smith translated text of the Book of Mormon.
Full Conclusion Truth: The Book of Mormon DOES NOT state that Nephi was in two different places doing two different things at the same time. There is NO ANACHRONISM in the Book of Mormon's times and events. What has been 'created' is an anachronism of Book of Mormon scholarship, an anachronism of man and not of God. Either Elder George Reynolds' suggested time line needs to be adjusted, Orson Pratt's Biblical cross reference of 1 Nephi chapter 7 verse 14, or an understanding that the Bible may not include all events of history told accurately. Thus one of these ought to be adjusted to reconcile the matter. As for myself, the seeming anachronism is most easily dispelled by an adjustment of the first 30 years of Elder Reynolds' suggested chronology used as scholarly notes in the Book of Mormon. It would mean that Lehi's family spent some 8 years in the valley of Lemuel before retriving the family of Ishmael and then after departing to travel in the wilderness toward the first land of Bountiful. They likely spent another 8 years as reported in 1 Nephi 17:1-4 in that journey before arriving in that first land of Bountiful in about 584 BC and NOT 592 BC as Elder Reynolds had concluded in his suggested dating. Repeat there IS NOT an anachronism in the text of Book of Mormon as translated by Joseph Smith. It has only seemingly been created and placed there by the 'scholarly' deductions of men.
Graphic Solution: Considering Lehi's journey in the Old World covered in 1 Nephi 1-17, beginning at Jerusalem then to the Valley of Lemuel and then on to the first land of Bountiful via Nehem or Nahom, what is the timeline? In 1 Nephi 7:14 Nephi brings the family of Ishmael from Jerusalem to the Valley of Ishmael referencing the imprisonment of Jeremiah and by 1 Nephi 17 in the land of Bountiful, Nephi is building a ship. Nephi cannot built a ship and bring the family of Ishmeal from Jerusalem at the same time. So the 8 year journey cited in 1 Nephi 17:4 must be from the Valley of Lemuel and NOT from when Lehi first left Jerusalem. And Lehi's family's stay in the Valley of Lemuel must have also been for about another 8 years. Elder Reynolds counted the 8 years as from Lehi's departure from Jerusalem but should have noted Jeremiah's imprisonment and deduced that it was an eight year journey from the Valley and NOT Jerusalem yielding 584 BC and not 592 BC for his chronological date of when Nephi built his ship in Bountiful.