AI for $13

I was skeptical when my wife handed me a small plastic toy saying, "think of something, after twenty questions it will guess."   But twenty questions later it answered correctly.  Weird and a little freaky.

20Q is featured today in Kevin Kelly's Cool Tools.  He provides some interesting brackground information:

Burned into its 8-bit chip is a neural net that has been learning for 17 years. Inventor Robin Burgener programmed a simple neural net on a DOS machine 1988. He taught it 20 questions about a cat. He than passed the program around to friends on a floppy and had them challenge the neural net with their yes/no answers to the object they had in mind. The neural net learns only when it plays a game; no data is added except for the yes/no answers of visitors. So the more people who test it, the more they teach it. In 1995 Burgener put the now robust neural net onto the new web where anyone could play it (that is, train it) 24 hours a day. And they did. Burgener's genius was to turn the hard tedious work of training a neural net into a fun game for humans.

Last year, after 1 million rounds of 20 questions online, the neural net had accumulated 10 million synaptic associations. It has a 73% success rate of guessing what you thought. Burgener then compressed the 20Q code to run on a chip, and had the neural net select 2,000 of the most popular 10,000 objects it then knew about. He then had the neural net select out the most useful 250,000 synaptic connections related to those 2,000 objects, and hard wired that learning into the chip in the orb....

The toy is remarkable. Because it is so small, so autonomous, its intelligence is shocking to the unprepared. Most children can't stump it, and if you stick to objects it will stump smart adults about 80% of the time with 20 questions and most of the time with an additional 5 questions. I love to watch people's reactions when they think of a "hard" thing, and after a seemingly irrational set of questions you are convinced are dumb, the sly ball tells you what you had in mind....

right now, for ten bucks, you can get an amazing little artificial intelligence, about as smart as an insect -- but an insect which specializes in guessing what object you are thinking of. And in that part of the brain, it's smarter than you are.

Thanks also to Boing Boing Blog for the link.