17, Institute of Critical Studies sustains research, academic and editorial endeavours in a wide array of areas. Conceived as a post-University, its practice of critique as concept and praxis, but primarily as social bond, has found echoes in the wider Spanish-, Portuguese- and English-speaking worlds. Mayer-Foulkes’s talk will account for the structural part played by improvisation in the overall performance of this growing, “silence-producing machine,” as he first imagined it.