So far so good. But what's the thought experiment? You promised a thought experiment! So far you've just suggested something to think about.
As for will vs. brain chemistry, I'd say the better question is this: can Robert's will, which accords perfectly with brain chemistry, consistently produce the behavior he wills? The answer to that is clearly no-- if I tell Robert I'll give him a hundred dollars not to blink for a minute and then start throwing stuff toward his face, he will almost certainly blink.
As for will vs. brain chemistry, I'd say the better question is this: can Robert's will, which accords perfectly with brain chemistry, consistently produce the behavior he wills? The answer to that is clearly no-- if I tell Robert I'll give him a hundred dollars not to blink for a minute and then start throwing stuff toward his face, he will almost certainly blink.
