Seriously, what are the principles of their theories, on what evidence are they based, what do they explain that wasn't already obvious, etc? These are fair requests for anyone to make. If they can't be met, then I'd suggest recourse to Hume's advice in similar circumstances: to the flames.
In a similar vein, Richard Dawkins writes in a favorable review of Alan Sokal and Jean Bricmont's Intellectual Impostures:
Suppose you are an intellectual impostor with nothing to say, but with strong ambitions to succeed in academic life, collect a coterie of reverent disciples and have students around the world anoint your pages with respectful yellow highlighter. What kind of literary style would you cultivate? Not a lucid one, surely, for clarity would expose your lack of content.
Dawkins then uses a quotation from Félix Guattari as an example of this "lack of content".
It has been suggested that the term "postmodernism" is a mere buzzword that means nothing. For example, Dick Hebdige, in "Hiding in the Light," writes:
When it becomes possible for a people to describe as ‘postmodern’ the décor of a room, the design of a building, the diegesis of a film, the construction of a record, or a ‘scratch’ video, a television commercial, or an arts documentary, or the ‘intertextual’ relations between them, the layout of a page in a fashion magazine or critical journal, an anti-teleological tendency within epistemology, the attack on the ‘metaphysics of presence’, a general attenuation of feeling, the collective chagrin and morbid projections of a post-War generation of baby boomers confronting disillusioned middle-age, the ‘predicament’ of reflexivity, a group of rhetorical