It can work this way:
General Rule 1: All other general rules can be overriden by specific rules.
Without realizing it, this was "understood". We somehow "imputed" this amazingly complex hierarchy of rules. More amazingly, we did it so automatically and easily, that we didn't even notice, nor could we, without some introspection, say exactly what we were doing...
Nah. It was just up front.
We read it first. On the clearly labelled "this stuff applies to all other stuff/everything else in the game" page. I believe it was entitled "Using This Book."
So it has precedence to what we read after.
I imagine I can't be the only one who noticed that? So, I would say, at least some up us knew exactly what we were doing, noticed and understood, correctly, and accordingly.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.