Well, I dunno. Yann Lecun and Yoshua Bengio have both given presentations on moving from existing perception tasks towards human-level AI, focusing on how to d

Well, I dunno. Yann Lecun and Yoshua Bengio have both given presentations on moving from existing perception tasks towards human-level AI, focusing on how to do so with neural nets whose parameters are fitted via gradient descent. And I'm not even sure I would call it "parameter fitting". I'd call it, "continuous circuit searching via gradient descent", because that's all you're doing: searching for a nice analog circuit for your task within a large, continuous space of such circuits.