This is good stuff. As a search engine, it could very well be useful. As another poster pointed out, if some context or explanation were provided along with the

This is good stuff. As a search engine, it could very well be useful. As another poster pointed out, if some context or explanation were provided along with the source suggestions, its utility as a reference would really grow. I totally agree with you that prompted help is a big deal and just going to get bigger. We have developed a language for fact checking called MSL that works exactly this way in practice -- suggesting multiple options rather than just inserting things. One of the things that interests me about this thread is the whole topic of UI vs. AI and how much help really comes from giving the user options (and a good UI to discover them) vs how much is "AI" or really intelligence. I think the intelligence has to belong to the user, but a computer can certainly sift through a bunch of code to find a search engine result and, those results could be better than you get now from Google &Co.