Last Wednesday, Derren Brown amazed the nation by predicting the National Lottery. On Friday night, he promised to reveal how to do the trick, and this resulted in an hour long show that demonstrated some nice mental gymnastics, but no real answer. He started by stating that there were three (main) ways of predicting the National Lottery:
- Faking a ticket.
- Predicting the outcome of the machine.
- Fixing the machine.
Option 1 wasn’t really an option for him, since it involved breaking the law and wasn’t really predicting anything. Option 2 was of more interest, and the rest of the show was devoted to this, explaining about various mathematical tricks you can do, and finally came to the “wisdom of crowds” technique.
Derren explained that a mathematician observed a “guess the weight of the ox” game at a country fair, and although nobody got the answer spot on, if you took the average of the answers given by the crowd, you got the exact weight. He said the same technique could be used to predict the lottery, and showed a film of 24 individuals studying the numbers of the last 100 lotteries, and trying to figure out what the next numbers would be. On the first attempt, they got 1 correct, on the second, when they did automatic writing and were allowed to write down negative numbers and numbers higher than 49 (the highest number in the lottery), they got 4 out of 6. Derren claimed that on the last go (a few minutes before his lottery prediction on Wednesday), they gave him the numbers that would eventually end up on the podium next to him; his prediction.
Of course, none of that makes any sense, and it doesn’t surprise me. Predicting the lottery is impossible if you are trying to guess some kind of pattern to the numbers. The reason why “wisdom of crowds” worked for the ox is because everyone could see the ox, and in guessing its weight you will have people who go too high and people who go too low, the average of all these values will be a good estimate for the weight. The same just doesn’t apply to random lottery balls; it doesn’t matter if a group of 24 people come up with “2″ as an answer, the machine will pick balls at random, and in a random machine every ball has an equal chance of coming out.
So how did he do it? People who want to believe his explanation will think that, the more rational will come up with other methods he could have used. The one that seems most likely is the theory that he simply used a split-screen and some very clever live video editing. The evidence that backs this theory up is the apparent sudden movement of one of the end balls in the stand (caused by the split-screen syncing back to a single-screen view), and the fact that Derren didn’t reveal his prediction before the actual draw. His reason for not doing this is that the BBC had a legal right to announce the result before anyone else, but the only problem with that logic is that he wasn’t announcing the result, he was announcing his prediction. Even in the “behind the scenes” footage that he aired with his show on Friday, you only see him select the balls out of the box, not the actual balls themselves.
As for option 3, in the true spirit of a showman, Derren took to the stage in the last 5 minutes of his Friday show, and told everyone how he *could* have done it by fixing the machines; simply make 12 sets of weighted balls, sneak into the high security area where the machines are used, and replace the regular balls with the weighted ones. His story was illustrated by blurred out pictures on the wall behind him, which gave everyone a laugh, and reminded everyone that this was Derren Brown; a man who does not reveal his secrets even if he says he will.
This Friday, Derren has promised to reveal a tape that will literally “glue us to our seats” in a show he has called “How to Control the Nation“. I’ll be sat with my laptop so I can tweet the event and see whether I get “stuck” as Derren says I will.