Original sentence: Both critics and proponents of the Book of Mormon have used linguistic methods to analyze the text.Critics point out places where the language  seems to be anachronistic, a common sign of a fictional work.Proponents have discovered stylistic forms that Joseph Smith and contemporaries are unlikely to have known about, as well as similarities to the Egyptian and Hebrew languages that the book claims to have been written in
Edited sentence: Conversely, if textual analysis reveals anachronisms, that is significant evidence that the Book of Mormon was a product of the 19th century.If textual analysis of the Book of Mormon reveals information about the American Indians that was not known in the 1800s, but is known today, that is significant evidence for the veracity of the Book of Mormon's claims of its origin