Tesla boss Elon Musk has rubbished claims made in a biography that he sacked his assistance of 12 years because she asked for a raise.

The biography, written by Ashley Vance and published in 2015, claims Musk gave Mary Beth Brown two weeks off after she asked for a raise, to see if he could take on her responsibilities and carry on without her.

On her return, Musk is alleged to have let her go.

Despite the book being on sale for over two years, this anecdote has only recently made its way into several online news reports.

Although Musk admitted he and Brown parted ways, he claims to have paid her 52 weeks of salary on her departure, plus stock options.

"Ashlee Vance's biography is mostly correct, but also rife with errors and never independently fact-checked, despite my request that he do so," Musk said, adding: "Of all the bogus anecdotes, this one troubles me the most.

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