I have difficulty distinguishing between what has been described to me as "meta-modernity" and what older textbooks describe as "eclectic post-modernism", and b

I have difficulty distinguishing between what has been described to me as "meta-modernity" and what older textbooks describe as "eclectic post-modernism", and between that and what Orwell described as "double-think", albeit with more positive overtones (plus-good, not plus-bad). I don't really think it's a separate phenomenon from post-modernity, more a natural emergent property of a post-modern culture, but I would add to that that I am not really knowledgeable in this area, just interested in contributing to the discussion and maybe getting some clarification & correction on my views.