Randomness is a concept that defies categorization; by definition, it comes out of nowhere and can't be anticipated. While we intellectually accept that it exists, our brains can't completely grasp it, so it has less impact on our consciousness than things we can see, measure, and categorize. Here's a simple example: You leave late for work but still arrive in time for your 9 A.M. meeting. Congratulating yourself, you are oblivious to the fact that two minutes behind you on the freeway, someone blew a tire and blocked traffic for a half-hour. Without knowing it, you narrowly missed being late. Perhaps you draw the conclusion that tomorrow, you can afford to sleep a little later. But if you'd been in that traffic jam, you'd draw the opposite conclusion: Never leave late again. Because it is our nature to attach great significance to the patterns we witness, we ignore the things we cannot see and make deductions and predictions accordingly.