easy part, in a sense, because we control it. Technology can be invented; human nature is something we're stuck with. I'm going to talk about that neglected third factor, human capabilities. What people can do. Because if a tool isn't designed to be used by a person, it can't be a very good tool, right? Bret Victor, «A brief rant on the future of interaction design» http://worrydream.com/ABriefRantOnTheFutureOfInteractionDesign/