Consider every repo on github to be a movie. Copilot is taking individual frames out of every movie on github and composting them into a new film.

I think most of us would agree that individually, each frame is copyrighted. But what if you take one frame from a million different movies and put them in an order that produces a new coherent movie?

The core question we need to settle in court is: does the new movie become its own copyrightable work, or is it plagiarism?