I am very impressed with the homework these people did. One of the criticisms that a JWs makes when an outsider speaks about the religion is that they don't understand the language and culture. The RC absolutely has a handle on the JW-speak.
Do you notice how they as questions in such a professional and non-judgmental perspective. The example that comes up is their questioning of Applewhite about elders being appointed by holy spirit. They knew the literature They also knew how to as questions with no indication that they had an opinion about the subject matter. Those skills don't happen by accident.