That is a great point and I agree. Its easy for the JRE "Its just a hang for a couple hours" to make it seem like he is just talking on the fly. Some times the curtain gets pulled back and people pull out and mention their notes on the show. I could definitely tell there were some bullet points that John was trying to cover, and Im sure these are topics hes covered in front of audiences when he gives lectures/appearances. But there is a fluidity to his responses that suggest he does indeed have a great talent for conveying complicated subjects with ease.