I have begun reading Kahneman's Thinking Fast and Slow. He admits that system 1 can react before system becomes conscious of a particular behavior. Once system 2 becomes aware, however, it can modify system 1's response based on reasoning, additional evidence, past experience, etc. Is there any value in thinking of system 2 as the seat of free will (I choose not to accept system 1's acceptance of a "trick question" fallacy)? If so, and we agree that systems 1 & 2 are aspects of one mind, does it follow that we have addressed Harris's claim that free will is an illusion?