Misplaced comment considering this is not about Github Copilot.
> Think of CoPilot as having your very own ChatGPT seamlessly integrated into all your Microsoft applications – Windows, Edge, Excel, and PowerPoint.
Shrug, the point is still relevant. Has he trained it on his own data, or just everyone else's?
I would presume an Excel AI is trained or fine-tuned on Excel, yes. Anyway, you're not asking these questions in good faith. You've already made up your mind that AI is bad: https://news.ycombinator.com/item?id=37714113