Need to look up a rule but don't have access to your sourcebooks? It turns out that Paizo publishes a reference document that contains only the "Open Game Content" as specified in the Open Game License. It's available at http://paizo.com/pathfinderRPG/prd/.
It'd be cool if, eventually, I'm able to translate that to markdown for better internal reference and whatnot, but you can refer to the reference document for any rules questions. I certainly will.