In the summer of 2012, just days before a certain columnist was found to have plagiarized from The New Yorker, a staff writer at the prominent magazine itself resigned in the wake of a widespread plagiarism scandal. The journalist, famous for pop-science works that generated scathing reviews, had been using unattributed quotations taken from other people’s interviews. He had copied-and-pasted from his peers. Generally, he had faked his credentials as an original researcher and thinker.

The New Yorker itself had a doozy on its hands. The scandal had tarred the magazine’s famed fact-checking department, despite claims that its procedure was “geared toward print, not the Web.” Editor-in-chief David Remnick was embarrassed. He’d initially kept the writer on board, distinguishing one bout of self-plagiarism from the more serious offense of “appropriating other people’s work.” Now, his magazine was losing a star that had been groomed as “Malcolm Gladwell 2.0.”

That…