Thomas Shey
Legend
Sometimes it might be like that if it is about more obscure knowledge, but many things you just know or don't instantly.
Knowledges are always weird. Sometimes they're used to see if you can remember something obscure, sometimes to see if you know it at all. Probably even more than physical or technical skills, they probably should more commonly be set up such that once your actual rank in the skill (whatever than means in a given game) reaches are certain point, some things are simply automatic.