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?
It’s all chemical, and even bacteria, which are single celled, have quorum sensing.