Musk isn't the most reliable source of information about himself: ' Musk sells himself as a singular mover of mountains and does not like to share credit for his success. At SpaceX, in particular, the engineers “flew into a collective rage every time they caught Musk in the press claiming to have designed the Falcon rocket more or less by himself,” '

https://www.technologyreview.com/s/539861/techs-enduring-gre...