Board Thread:Speculation House/@comment-27027823-20150928204654/@comment-4010415-20150928212617

Basically, it's like the difference between stupidity and ignorance.

Stupidity means that one cannot learn. Ignorance means that one simply has not learned yet.

A young, ignorant Grimm seems mindless, as it hasn't yet learned that impulsively rushing head-first into a fight is a bad idea. Older, wiser Grimm who have survived and learned from their experiences have knowledge of what does and does not work. Therefore, they'll be more cautious and patient than a young Grimm. Both are equally intelligent, but one has learned more than the other.