system
A chat on subreddit /r/wallstreetbets
human
very credible source

gpt
I pulled off a great source in one of my recent group projects. A friend of mine had worked for a year as a consultant, and when we did a project on a company of our choice we chose the company he has mostly worked with, so a lot of our presentation was just using his own work. It would have been fun to just write 'Source: Me' in our presentation.