I think it's the details of the doing that really do matter, that actually matter the most. Especially the further away in time you get from the initial act.
For example. Let's get basic. The act of planting a tree next to another tree.
The most common "bad information" I've seen deseminated by permaculture course leaders is in the act of planting fruiting trees way too close together. This is SO COMMON, and happens regularly when people who are long on enthusiasm and short on experience plant some fruit/nut trees - as a good group activity for a
PDC, and for the good of the planet!
I know that many people would probably say that it's better that the trees were planted too close together than not at all. But please consider: (and I think Paul might have similar stories)
I had the experience of being in an orchard 15 years after a
PDC course spent a few days planting it. These twenty or so trees didn't actually produce much fruit because most of them were too shaded by their neighbors, and some of them were starting to suffer from diseases because of their lack of sun. The
canopy was completely closed, you couldn't walk through the trees without stooping in half, the only thing growing under the trees was grass and unchecked comphrey patches growing ever larger. It would have been difficult to cut out some of the trees without seriously damaging other trees (would require some seriously skilled fruit tree logging).
The owner of the orchard (who had to
live with the choices and actions carried out by eager PDC students) expressed regret about the sad state of the orchard, said comphrey was an invasive species and she hated it, wished things had been done differently. Differently how? If there had been ten, or even only five trees planted that day, and the land owner had been able to easily walk between trees and manage the comphrey properly (cutting it before it flowers) and harvest the fruit easily, she might have had an amazingly productive space to be proud of. As it was, the mis-directed orchard in her
yard created a sour taste for permaculture in this person - probably permanently.
Now, in her case it didn't matter that the twenty trees didn't really function as a good source of on-location food. But what if the stakes of a sure source of food 15 years later were high - as in, the success or failure of your orchard is directly proportional to the amount of fruit your family eats in a year?
Who do you trust to advise the planting of your trees? These are important questions!
I imagine that the person who organized the planting of those trees continued to direct people who came to their courses to plant trees in that sardine-can manner (I have no idea who that person was). I see other, perhaps even several more dis-functional (or at least less than optimal) orchards started because of this person's lack of experience with full sized trees.
Who knows how many people this PDC leader taught to plant trees like this? Do you see how the waves can get larger both with good and not so good information? And that the not-so-good information also has real world consequences, for people, trees, and the earth? I'm not so sure that's good for the earth (certainly not ideal for the trees involved) or all that great for permaculture's reputation. A lot of people out there still think we're totally nuts, remember.
I think that this lack of experience can be made up for by loads of careful and thorough research, but I also think that there's nothing like watching a tree grow from a sapling into something resembling its mature self to appreciate how large some trees actually become later in life, and to fully understand how to create ecologically appropriate polycultures that
feed people without a whole gob of work. There's a lot to it!
The whole field is such an ocean of 'stuff' to know. It probably takes a good thirty years before a person could be well versed enough in enough disciplines to be truly informative. All of the best (most knowledgeable, most clearly articulated, most widely ranging ideas) permaculture teachers I have met have been in their sixth decade of life or more.