Trialogue with Dominique Cardon. Dominique Cardon is a sociologist at a research lab called Orange Labs, and associate professor at Marne la Vallée University. His works concentrate on the use of Internet and the digital public space transformations. He published “La démocratie Internet” (Seuil/La République des idées, 2010), with Fabien Granjon, and “À quoi rêvent les algorithmes : Nos vies à l’heure des big data” (Seuil/République des idées, 2015).