Memory hole

A memory hole is any mechanism for the deliberate alteration or disappearance of inconvenient or embarrassing documents, photographs, transcripts or other records, such as from a website or other archive, particularly as part of an attempt to give the impression that something never happened. The concept was first popularized by George Orwell's 1949 dystopian novel "Nineteen Eighty-Four", where the Party's Ministry of Truth systematically re-created all potentially embarrassing historical documents, in effect, re-writing all of history to match the often-changing state propaganda. These changes were complete and undetectable.
Origins.
In "Nineteen Eighty-Four" the memory hole is a small chute leading to a large incinerator used for :censorship:
"Nineteen Eighty-Four"'s protagonist Winston Smith, who works in the Ministry of Truth, is routinely assigned the task of revising old newspaper articles in order to serve the propaganda interests of the government. For example, Smith may be called to retroactively change a statement about food rationing to reflect new policies.
The memory hole is referenced while O'Brien tortures Smith; O'Brien produces evidence of a coverup by the Party, exciting Smith that such documentation exists. However, O'Brien then destroys the evidence in the memory hole and denies not only the existence of the evidence but also any memory of his actions. Smith realizes that this is doublethink in action, as O'Brien has actively suppressed his memory of both a politically inconvenient fact and his action taken to destroy the evidence of it.
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