Musings on the Doctor Who S5 story arc (spoilers through Cold Blood)

I know this has been reiterated SO much lately, what with everyone and his aunt coming up with theories. At this point, if it's written down here, it's probably been written down about ten or twenty other times in other places.

My reasoning is mostly on the crazy crack in the wall. Hear me out and comment? :D
Cross-posted to doctorwho
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