Apparently this question is going around Silicon Valley. It's actually pretty good.
"I'm going to give you five minutes," he told me. "When I come back, I want you to explain to me something complicated that I don't already know." He then rolled out of the room toward the snack area. I looked at Cindy. "He's very curious about everything," she told me. "You can talk about a hobby, something technical, whatever you want. Just make sure it's something you really understand well."
"He" is the top Goog at Google.
What would you talk about my dear non-reader?
That is a tough one. What do I really know that's complicated?
This coming from a complicated simpleton.