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Historical revisionism is the critical study of historical facts and official accounts, in order to review them and eventually reinterpret them. Its academic use refers to the reinterpretation of historical facts in the light of new data, or new, more accurate or less biased analysis of known data.
Revisionism presupposes that among historians, or the general public, there is a generally accepted way of understanding a historical event or process and that there are reasons to question it. These reasons may be of different types: the enhancement of new documents, the change of historiographic paradigm; or also the change of values from which the past is observed.