The initial impulse to write "Understand" arose from an offhand remark made by my roommate in college; he was reading Sartre's Nausea at the time, whose protagonist finds only meaninglessness in everything he sees. But what would it be like, my roommate wondered, to find meaning and order in everything you saw? To me that suggested a kind of heightened perception, which in turn suggested superintelligence. I started thinking about the point at which quantitative improvements – better memory, faster pattern recognition – turn into a qualitative difference, a fundamentally different mode of cognition.