Having set up a fairly rigid taxonomy of thinking about PCG types, I think it's time to break it down. There's a couple of reasons why:
1. It's too difficult to spell taxonomy.
2. I've created this pcg-algorithm: _concepts tag and want to use it.
So if no one has any objections in the next couple of days, I'll move these across.
Of course, there's an equally valid argument to go 'why are these algorithms at all?'. They're not. They're higher level concepts. But they lie close to algorithms on the thinking about 'how do I implement the creation of procedural concept.'