When you get in situations where you cannot afford to make a mistake, it's very hard to do the right thing. So if you're trying to do the right thing… - Ward Cunningham

the best way to get the right answer on the internet is not to ask a question; it's to post the wrong answer

Now, with wikis, you have a place to write. A wiki is a place to write in the same way that a party is a place to talk. There are thoughts all around you. Some are interesting, some less so. At a party or on a wiki, a word or two will be your trigger. Ideas start flowing. Talking or writing, you're among friends, the stage is set, you say your piece, it fits in, your words trigger the next thought: conversation.

The code might be organized in a hierarchy, but the solution has more dimensions than will fit in a hierarchy. So when you discover a solution in a dimension that crosses across the hierarchy, you just have to go where the solution takes you and put the solution in.