I'm not sure what your point is with B1+B2. Sure, we don't understand (can't predict) everything about our environment, but the level of complexity we can unde

I'm not sure what your point is with B1+B2. Sure, we don't understand (can't predict) everything about our environment, but the level of complexity we can understand - Saturn V rocket for example - is pretty astounding. If you look at the brain as a bunch of interacting subsystems, then the level of complexity really doesn't appear that great. I think historically people have overestimated the theoretical complexity of the brain for a variety of reasons.