Starting from a molecule on up, to cells and beyond, at what system level is a being actually making a decision rather than reacting to their chemical environment based on purely chemical laws? For example, the molecules in a cells are solely reacting to their environment based on chemical fundamentals. However, a person thinks things through and makes decisions. Where in that range do we see decisions start to emerge?
If I remember my cognitive science classes, all decisions even complex are powered by a person’s neural circuits, in which neurons talk to each other chemically using neurotransmitters. Basically, large groups of constantly-rearranging neurons are what turn what you call “chemical laws” into constantly-evolving decisions.