Sorcery? clairvoyance? nothing of all that! 20 Q is a small electronic ball disarming by its simplicity with the first access. A ball with a screen and 4 small buttons to guess in 20 questions what you are thinking! think to anything you want then start to answer the 20 questions then that 20Q will pose to you using the buttons "I do not know", "not", "yes", "sometimes". In 95 % of the cases it will find the good answer, it is quite simply... incredible. How that may this be? I ask it to you! Here the answer: the artificial intelligence behind 20Q is similar to the neurological system of the human brain. It is composed of thousands of neurons which are connected by synapses. All that he knows of the questions and answers given, results from the information provided by the people having tried to overcome it on the site (www.20Q.net). (For information, a human brain has 100 trillions of connected synaptic, version Internet of the 20Q has about it 100 million and the version pocket has 250 000 about it!). Hours of guaranteed recreation and astonishment!