What chemical reaction produces a force existing outside that of cause and effect? At what point do atoms collectively gain autonomy? Are our consciences not just the collective effect of chemicals and electrical circuits?
Do you believe in free will or not, and why do you hold that belief?
Note: Before you bring up the go-to quantum physics experiment resulting in "multiple different outcomes", remember that the results of that experiment are attributed to human's lack of understanding of quantum particle behavior. It's not as if each particle is just randomly selecting a path, there is a set cause and effect underlying these seemingly random outcomes that we are simply unaware of and have yet to understand. Yet some jackass scientists chose to think "well we know everything there is to know about quantum physics of course, yet for some reason we don't understand the paths of these quantum physics - so rather than acknowledge there's simply more for us to understand let's just say they act randomly!"