"In the walls of the cubicle there were three orifices. ... Similar slits existed in thousands or tens of thousands throughout the building. ... For some reason they were nicknamed memory holes." — George Orwell, "1984"

Documents inconvenient to the regime went into the Ministry of Truth's slits and down to "enormous furnaces." Modern tyrannies depend on state control of national memories — retroactive truths established by government fiat. Which is why Russia's Supreme Court recently upheld the conviction of a blogger for violating Article 354.1 of Russia's criminal code.

This May 2014 provision criminalizes the "Rehabilitation of Nazism." The blogger's crime was to write: "The communists and Germany jointly invaded Poland, sparking off the Second World War." The secret protocols of the Molotov-Ribbentrop Pact have gone down one of Vladimir Putin's memory holes.