Superhumanity conversations: Jon Goodbun responds to Daniel Birnbaum and Sven-Olov Wallenstein, “Spatial Thought” A review of Jean-Francois Lyotard's 1985 Pompidou exhibition Les Immatériaux. Who or what are the Immaterials? What is their nature? What is their culture? And how and why did they come to inhabit a labyrinth on the fifth floor of the Pompidou Centre for a number of months during 1985? What did they do in there? And what did they say? What was the meaning of their occupation of that building, in that city?