Like I mentioned earlier, I try to play by the rules as written because I think that helps in establishing a coherent world, and therefore aiding in immersion... but I'm with the GM on this one. When I say that the game world runs according to the rules as written, that carries the unspoken rider "to the extent that I know and understand them." Pointing out rules to me that I have missed in particular cases is fine, but if my planned scenario hinges on an assumption that's contradicted in some obscure paragraph in the middle of a disjointed, poorly indexed mass of text that I hadn't noticed because my eyes had glazed over by the time I got to that point? Oh, you'd better believe that I'm overruling that one! :p