Historical negationism,[1][2] also called denialism, is falsification[3][4] or distortion of the historical record. It should not be conflated with historical revisionism, a broader term that extends to newly evidenced, fairly reasoned academic reinterpretations of history.

the term historical revisionism identifies the re-interpretation of a historical account.[1] It usually involves challenging the orthodox (established, accepted or traditional) views held by professional scholars about an historical event or time-span or phenomenon, introducing contrary evidence, or reinterpreting the motivations and decisions of the people involved.