If someone asks you if you want vanilla or chocolate ice cream, once you have made a choice, even dualists would agree it is just a dance of chemistry that sequ

If someone asks you if you want vanilla or chocolate ice cream, once you have made a choice, even dualists would agree it is just a dance of chemistry that sequences a series of neural firings which propagate, excite muscle contractions, resulting in the verbalization of "chocolate". That is, the soul isn't acting at the level of muscles or plucking the strings of individual neurons to make them fire. Instead, dualists have a vague assertion that the soul influences (perhaps determines) the choice itself. Getting to my point: if you believe that the soul drives the choice and the decisions wasn't just the result of billions of (purely physical) neural antecedents, where in your brain are the rules of physics violated in order to steer that neural outcome we call "choice"? One hand wave is to say: quantum! Yes, quantum effects are not individually predictable, so one could imagine that a tricky soul which is trying to not be discovered somehow can cause just the right statistical fluctuation in the right neurons at just the right time to nudge the outcome to what it desires. But consider that that activation energy of a synapse is about 30 orders of magnitude greater than quantum fluctuations at the atomic level. Or put another way, not every butterfly flapping its wings causes a hurricane. Such things happen only if the interconnected decision points are on a knife's edge. It seems like wildly overconstraining to think that our brain configuration must be so delicately balanced for every decision we make to allow a soul to have the opportunity to effect every nudge that is required of it. Taking a step away from humans, spiders have pinhead "brains". They can navigate the world, choose a place to build a web, build a web, catch prey, avoid harm, repair their web, mate, reproduce. I think few dualists would credit spiders with having a soul. Why is it surprising that a brain a billion times bigger is capable of making music?