[chrismorgan]

No, the license that you apply is completely irrelevant, and there’s certainly nothing whatsoever special about the GPL. Copilot is completely depending on being effectively exempt from copyright; if that legal theory falls apart, the entire space (and a lot of other machine learning stuff) is utterly doomed. Trouble is, Copilot can’t tell whether it’s reproducing copyrightable chunks of your code, or indeed where what it produces came from, by the very nature of machine learning techniques.

[JamesSwift]

They could easily tag the source with license info and take that information into account when feeding data in.

[chrismorgan]

That’s not how learning, human or machine, works. Learning is about collecting all kinds of stuff from diverse sources into a great melting-pot, so that you can form something new out of it—but you can’t generally identify where everything comes from. Individual recognisable tricks perhaps, but if you want to say “this code was inspired by X, Y and Z”, well, that inspiration is typically everything, the entire corpus.

[wizzwizz4]

It could, actually, if it were augmented with the ability to do so – but that would be a bit more expensive.