The avoidance of repetition reading the same passage again for no good reason other than navigational aporia is a major problem for hypertext. In certain systems (like this one) it is hard or even impossible to prevent or disallow. In its material form, the book allows random access at all times, but conventions of literacy ensure that readers need not return to previously read passages of text, unless they really wish to do so. There is also a contradiction between the (politically correct) empowerment of the hypertextual reader, and the implementation of (underlying, hidden) systems which control what it is possible for the reader to see and read. And yet all authorship is programming. It is the pre- writing of a programme with indications of what and how to read.