Companies of this size have routine code audits that would find copyright infringements of this sort. If the employee literally brought in source code files and

Companies of this size have routine code audits that would find copyright infringements of this sort. If the employee literally brought in source code files and not even change the name of the directory like it was highlighted here, it'd have been caught. The audit is also not conducted by the manager, but a third party. There is no possible way this would fly unless the individual intentionally stripped the source of copyright notices (the individual's fault), or the source code was just sitting on their laptop and never acted upon, etc. So I think the question (and I'm not a lawyer...) is whether Nvidia conducted such audit and to what extent (if any) the other company's source code was merged into theirs (versus just sitting on the laptop).