I love the show, so please don’t get me wrong on this.. Loved the “Timey-Whimey” feel of this episode and it’s total disregard to causality.. but I would ignore the causality non-sense during the pandorica opening scenes.. I mean how did come out in the first place to give the screwdriver to come out!
SPOILERS for next season though:
What I want to ask is: considering the ending of the episode, it seems the writers actually did think about the coming season completely… So, they knew how Dr. River Song (Melody Pond) came to existance… [Spoilers: Daughter of Amy and Rory, in time because of the doctor and had a time-lord thingy] So, River could not have existed if the doctor did not(well lots of things would have gone wrong, like they once showed when they changed Donna Noble’s History.. but lets ignore that). Now, if River never existed, how did she roam around the wedding and give Dad(Rory, now that requires time-travel even if she did exist some time in the future without the doctor) the blue book, and how did she even have it?