Before revision: Such revisionism, if challenged (especially in heated terms) by the supporters of the previous view, can become an illegitimate form of historical revisionism known as historical negationism if it involves inappropriate methods such as the use of forged documents or implausible distrust of genuine documents, attributing false conclusions to books and sources, manipulating statistical data, and deliberately mistranslating texts.
After revision: Such revisionism, if challenged (especially in heated terms) by the supporters of the previous view, can become a form of historical revisionism known as historical negationism if it involves illegitimate methods such as the use of forged documents or implausible distrust of genuine documents, attributing false conclusions to books and sources, manipulating statistical data, and deliberately mistranslating texts.