Quote Originally Posted by RedKnight
Sounds like there's a nail in this coffin.
I'd still like to know why these settlements are chosen. I've had a quick look through the new provinces that the Total Realism guys modded in, and about half of them had the 15%. Still no obvious reason why, although that is a higher percentage than in the vanilla game.

Pulling a few possible reasons out of my magical hat:
  1. There is a easily moddable rebellious factor, but I just can't find it.
  2. There is a (hidden) unrest hidden resource.
  3. It's based on position mentioned in some game file.
  4. It's purely random.
  5. It's based on some indirect factors, e.g. something like the % of forest in the province.