"We're designing/running the lottery. You get to pick the winning numbers, in secret, obviously so no one will know. There are millions of numbers you can pick from, using a random system so it's all trustworthy. Instead of drawing a random ball out, and another and another, you write down the number 4 on a bit of paper and go home for the day thinking it's a job well done. No one noticed because they all expected it to take up to a million guesses, until someone just asked if it was 4"