Q521

So I'm a little fuzzy on the 3.0 to 3.5 precedence rules.

Its my understanding that 3.0 stuff should work just fine with only minor adjustments to change the way some things function (like say DR), and if a book was never reprinted as 3.5 the 3.0 stuff should be just fine.

What about if two sources disagree? How do I determine what is the Primary Source?

In 3.0 only it would have been simple, newer more specific material can overrule the older general rules. But with 3.5 reprints the core book is now the newer printing than the old splatbook with the different rule.

How do I place old 3.0 splatbooks that haven't been reprinted in rules precedence?