1. Simple nerve cells connecting sensing cells
to acting cells.
2. Learned responses, reinforced by values such
as "eating is good" and "injury is bad".
3. Must solve the credit assignment problem (CAP),
how to reinforce behaviors when rewards come
much later, and multiple behaviors precede
4. Need to simulate the world to solve this
efficiently - that is process experiences that
are not currently occuring - this is the root