That's a bold statement considering how easy it was for testers to quickly find examples of this in initial testing.
> against public code on GitHub
... and how some of those examples found were from code not hosted on Github.
Ultimately though, what matters here is not whether this is true but whether it's plausible enough for legal departments in companies buy it.
> That corresponds to one recitation event every 10 user weeks
> This investigation demonstrates that GitHub Copilot can quote a body of code verbatim, yet it rarely does so, and when it does, it mostly quotes code that everybody quotes, typically at the beginning of a file, as if to break the ice
A year old post now, YMMV.
The example I can remember was Carmack's* quick square root - but I'd probably call that "folk code" given it was passed down/altered before being misattributed to the Quake dev, and appears in hundreds of Github repos (many with permissive licenses like WTFPL, so a well-intentioned human may do the same).