The PMP Training coordinators listen patiently, and says something like: “Yes, you can read the PMBOK guide. But that alone may not be sufficient. What you need is a thorough understanding of the Project Management Methodology. And you also need to understand what PMI like to test you on in the PMP exam. Just reading the PMBOK guide, and understanding “how it applies to the PMP exam” are very different things“. You need to be in an “exam taking mode” when you study the PMBOK guide.