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@rtalexander wrote:
... limit the topics we teach to those specifically included in the official (ISC)2 guide to the CBK ...

That is a completely different question.  Yes, (ISC)² does publish an official list of topics in the CISSP Exam Outline. 

As you well know, there is no "authoritative source" for the CISSP exam.... at least in the sense we learned in college.  College exams are generally built exclusively from the lectures and the reading materials, often word-for-word.  CISSP adds personal experience and intuition to the mix.