The question of when we started being human and flexing our abilities has been coming under constant revision in recent years.

FORBES: Human Ingenuity: A 100,000-Year-Old Story

Under the current revision project, more words will be added quarterly in batches of several thousand until its expected completion date of 2010.

BBC: New chapter as dictionary goes online

If a company doesn't meet the nexus requirement, the Supreme Court would have to change its opinion-a painstakingly slow and unlikely course of action-or Congress would have to make a revision under the Interstate Commerce Clause in order to tax the company's e-commerce sales.

CNN: The Internet tax revolt

And the changes to the Irish constitution, renouncing the republic's claim to the North, may not now be made: under Irish law, this revision goes through only if the Good Friday agreement is implemented in full.

ECONOMIST: Parking the process | The