Not the real response you were looking for here but I wanted to thank you for your differentiation between "dumb" and "ignorant" and for openly owning your ignorance.
Everyone is ignorant of something. I'm ignorant of innumerable things.
Wouldn't it be cool if everyone could do what you did here?
Say "I'm ignorant, help me out?"
And then...how much more cool to get a kind, helpful, honest, ethical and correct as answer?
I have these dreams you see...