[...] one of the main features of deconstruction seems to be the impossibility of a message, text, or philosophy having a clear unequivocal meaning. This means that Derrida's philosophy of deconstruction, as Eddo Evink formulates it, 'cannot be discussed as "Derrida's philosophy" without opposing the leading idea of that philosophy--and this assertion, too struggles with the same problem'. [...]
Like postmodernist metafiction, Derrida's philosophy of deconstruction has an idealistic, liberating motivation: it wants to expose illusory notions and thereby transform our way of thinking. [...] a general characteristic of deconstruction is that it implies both construction and undermining (deconstruction does not destroy the illusions at which it is aimed; it both 'constructs' and 'undermines' them). The second aspect, or second double movement, is actually a specification of the process of undermining, naming that it is executed through the, as Derrida writes, 'double gesture' of 'overturning' and 'displacement'.
he's comparing it to Barth's literature of exhaustion