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- Max Levchin told Elon Musk's biographer about the difficulties of working with the maverick billionaire.
- In the early days of PayPal, Musk suggested an arm-wrestle to resolve an argument over software.
- It was "the stupidist imaginable way to settle a software-coding disagreement," Levchin said.
Elon Musk challenged his PayPal business partner, Max Levchin, to an arm-wrestle to settle a software argument, according to a new biography.