We've taken some time and updated/added a variety of help files around stats and skills to better capture the OOC information about them that many folks pick up over time, on game-help, or via xhelp.
Our policy around explaining how stats/skills work in character has not changed, and the information in these helpfiles was already available in various BGBB threads/game help convos, but we wanted to present it in a unified place, with examples, to better help new and existing players understand how our stat/skills work, without revealing the kind of information that we want found out in character.
You can start your journey into these help files with 'help stats' and then check out the see also sections. We discuss common knowledge things such as sub stats, the UE curve, how stats are allocated to sub stats, how stats play into skill rolls, and other such things.
Hopefully this clears up the OOC confusion some have expressed around the system, while maintaining the mystery of figuring things out in game!