Your question at the start of this thread is one of the many we have come across. The interesting thing is that the some " knowledgeable " replies to the query will certainly raise eyebrows, if not scare a lot of people.
Kinte, how very astute of you! A lot of the posts attempting to answer flyzhz's question really puzzled me. I was told by friends that pprune is full of con artists. Now I know for sure that there are indeed plenty of con artists on Pprune!
It's heartening to know that you still retain a lot of the Boeing VNAV system knowledge now that you are on the scarebus