Toni. Thanks for the link. That must have been a life changing experience to do a PDC with Geoff Lawton.
I think there are several ways to go at Permaculture. I think some PDCs just consider it a set of techniques: chop and drop, hugelkulture, food forests, etc. with no real understanding that the mission is to come to an understanding of the whole planet as an ecological system--in which the human race is only one small component, then curing our ignorance about the things we are doing to cause its demise. I don't think that can be done from an armchair in a city apartment.