Human being is more and more relying on the devices around him. He improves his self-awareness : users are reassured and influenced by the calculated results. However, are these technologies always right ? How far can we trust them ?


When he puts his hand on the device, the user lets himself be analysed. After several computations, the machine displays the result. This one is as surprising as false. Then, the user has to choose between believing the technology or believing himself.