Total derangement is the possibility of a madness that is no longer a disorder of the body, of the object, the body object outside the boundaries of the res cogitans, outside the boundaries of the policed city, secure in its existence as thinking subjectivity, but is a madness that will bring subversion to pure thought and to its purely intelligible objects, to the field of its clear and distinct ideas, to the realm of the mathematical truths which escape natural doubt.