If you had to guess, how many facts have you taken in today? How many factoids, dates, times, sale alerts, tweet-sized factoids, and other factual-or-at-least-pretending-to-be-factual pieces of information have passed across your screen? At this rate, how many more do you expect to take in by midnight? Let us present you with one more: According to Dr. Daniel Levitin, author of "The Organized Mind," your brain can only fully absorb four. Four.
...