To summarize Robin Hanson and Ben Casnocha's thesis, broad research questions beget more critical subsets of questions, which in turn produce conclusions: 

I know many folks who consider themselves intellectuals. I guess they think that in part because if you asked them “What have you been up to lately?,” they’d tell you about books, articles, blogs, or twitter feeds that they’ve been reading. Or perhaps TED talks they’ve watched. This is why I prefer the question “What have you been thinking about lately?” And I’ll usually be a bit disappointed if the answer isn’t about a question they’ve been trying to answer.
Yes perhaps if they just mention a topic, that really stands for some questions about that topic. But often people thinking about a topic are mostly trying to find more supporting evidence for things they already believe. Less often are they taking what I consider the most productive intellectual strategy: focus on an important question where you don’t know the answer.
Once you start to think about a question, you’ll probably soon start to break it down into supporting sub-questions. Instead of asking “How can we get world peace?” you might ask “What most goes wrong when the United Nations intervenes?” or “Why do citizens on the losing sides of wars support them?” And hearing about your interesting sub-questions might just make my day. That is why I, like the Harvard admissions dean above, will be especially eager to hear that you’ve been thinking about interesting questions.