Expunging yourself from the internet is very, very hard.
There are easier ways of expunging unwanted junk from a new computer.
"National security" lessons drummed into children by officers and an Ataturk army unit stationed in parliament have been scrapped.Hard-core Islamists despise Ataturk for abolishing the caliphate in 1924 and expunging piety from the public space.
Mr Orban may well get another four years to fulfil his mission of expunging the communist past and shaping the country according to the nationalist credo of Fidesz, his right-wing party.
When Sani Abacha, his defence minister, grabbed power, he re-imposed many controls on the economy.Mr Obasanjo has taken effective action to start expunging the virus of state intervention from the Nigerian economy.
Decades after expunging the idea of "small wars" from their textbooks after the trauma of Vietnam, American officers are relearning the lessons the hard way.At the heart of counter-insurgency doctrine is the idea of winning over the uncommitted "passive" majority.
On September 13th ISIS declared war on two other groups in Aleppo, in an operation named "Expunging Filth".
They worry about reviving their party's reputation for business-bashing, a reputation that Mr Clinton spent a decade expunging.
Then it pushed through the lower house of parliament a sweeping amnesty bill which would have let Mr Thaksin return home, while expunging thousands of other court cases.
Such an ink, suggests Bartosz Grzybowski of Northwestern University in Evanston, Illinois, could have all sorts of applications, from the obvious one of expunging a sensitive message after a few hours, to bus and train tickets that expire automatically after, say, a month.
In 1782 the expunging from the Commons journals of the resolution of 1769 against him vindicated his defense of the rights of parliamentary electors.
