PDA creater's theory on the brain

I like his enthusiasm and the topic of the talk.
I like the way he points out how little we know about the brain in terms of how it works.
Neuroscientists have to work with psychologists, please.
One day I dinnered with a friend's friend who happens to be a wet neuroscientist ("wet" means that he wears a lab coat for protection from wet things coming out of his experimental subjects such as mice or a mice's cells.) (I many times wear a lab coat because the AC is so strong that I cannot type) That neuroscientist insisted that eventually we would understand how the brain works when we know every detail to the molecular level of the brain. I simply shook my head and smiled.

This good TED talk (all TED talks are good, but I pick my favorites to be posted here) proposes a theory or a framework for how we can understand the brain better. I do not agree with him on his theory that intelligence is defined by prediction. Intelligence is defined by much more processes and outcomes, mentally and neurologically, besides prediction.
You can condition a pigeon so that it can predict if it is going to be fed when seeing a light.
Intelligence is defined by .... It depends.
How connected brain regions are may be the key. Which may result in how one connects events around her. Which may result in intelligent behaviors such as wise decision, creative action, and socially favored sentences.
This is my theory today. Tomorrow if I learn more, my theory may change, theoretically.