Here are few more things too look in to (for future patch) -
Trait intelligent there is absolutly no way to gain it beyond first level. But in campaign you can see characters with second level of this trait? possibly even third. So it look like developers forgot to add such thing like:
Trigger random_birthNN
WhenToTest CharacterComesOfAge

Condition Trait Intelligent > = 1

Affects Intelligent 1 Chance 50

etc.

Same thing applies to other skills like NaturalPhilosophySkill, MathematicsSkill, PhilosophySkill and other simillar skills.