In the 2006 version of your book, you described three types of specialized thinking. Now there's a huge skill loss problem we've got and I didn't realize it until I went to four places in 2019 for COVID hit. 20 years ago, we made two mistakes in education: We took out all the hands on classes in some schools,. Kids are growing up not using tools. The other big mistake that was made in industry is shutting down in the house engineering departments. Back in the 80s and the early 90s, these companies had big shops where they could invent and patent equipment. Those were phased out and they found it was cheaper and more economical to contract the workout.