Internet site Wikipedia has been hit by controversy after the disclosure that a prominent editor had assumed a false identity complete with fake PhD.
The editor, known as Essjay, had described himself as a professor of religion at a private university.
But he was in fact Ryan Jordan, 24, a college student from Kentucky who used texts such as Catholicism for Dummies. He has now retired from the site.
Wikipedia is an encyclopaedia open to all, written by volunteers worldwide.
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