I tested co-pilot initially with Hello World in different languages. In Lisp, it gave me verbatim code from a particular tutorial, which was made obvious becaus

I tested co-pilot initially with Hello World in different languages. In Lisp, it gave me verbatim code from a particular tutorial, which was made obvious because their code had "Hello <tutorialname>" where <tutorialname> was the name of a YouTube tutorial, instead of the word "World." It was surely slurped into the model via someone who had done the tutorial and uploaded their efforts to Github. Mind you, it's pretty much the way everyone would code it, but the inclusion of <tutorialname> is definitely an issue. So it isn't too hard to prove the case.