You're right, a deep dive does involve more than a single google search. Read multiple stories, dig up references, find what google's filter bubble isn't showing you, figure out what people on "both" (but usually several) sides are saying; maybe hunt down some podcasts if you're into that.

And, y'know, reading past the first comma in somebody's comment to notice that multiple topics were listed. I'd love to hear what you consider to be unmined topics.