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This whole business about the brain is a box within a box within a box was interesting because I have never heard that idea before and also because it makes things more simpler to understand.  If I learn anything about how the brain works I know that each box (each part of the brain) generates outputs and inputs which in turn eventually create a functioning organism with a functioning brain.  I guess even though the idea appears very vague at first, you can ask yourself any question about human or animal behavior and you can answer it by saying well some part of the brain (box) generates an output (resulting in the behavior you are looking at) because: it received an input from something or it wanted but we don't know why.  I think this makes talking about the brain and how it works alot easier.  However, I wish that we can go more into details about each box and exactly how do they generate these inputs and outputs? Now that I know the basic outline of how brain parts function on their own and with each other, I think it would be a good place to start going more into specifics about these different inputs and outputs.