I'm not a fan of classification. It is very difficult to come up with a classification scheme that's useful when what you're most interested in is th… - Ward Cunningham

Wiki is like a leaky bucket of information. It's losing information every day. But more information is coming in, so the net is positive. Even if it can lose things, wiki always has more to say than it did the day before.

Traditionally, the cost of change curve said that if we detect the need for a change early, it costs less to make the change than if we detect the need late. I tackled that curve by saying, let's almost intentionally make mistakes so we can practice correcting them. That practice will help reduce the cost of making changes late.
Our feeling was that the limiting factor on any change was not when it was done, but how much thinking was required.

We erased a problem by not trying to erase the problem, by saying, "This is in the nature of what we do." It's really weird that it could be that simple.