"Art is thinking but is not theory." In her notebook, Chus Martinez unsettles, theoretically and visually, the constraint of permanently assigning meaning in the public as well as in the private realm. Martinez emphasizes the need for collective thinking that can create a lively and-in its ambiguity-productive condition: knowledge. She thus undertakes a redefinition of "artistic research," a practice that can initiate a real public debate in society and that produces errors and nonsense in an age of consensus. "Unexpress the Expressible" asks about the role of contemporary art in our imaginations and our actions within or against the rules of society. Chus Martinez (*1972) is Member of the Core Agent Group and Head of Department for dOCUMENTA (13).