Concepts reference an infinite number of permutations of species (i.e. particulars subsumed under the concept). The decision-making process of choice involves considering concepts against other concepts. One can begin to fathom the infinite possibilities in consideration, but it's the power of conceptualization that divides and conquers these infinite possibilities. But what really adds to the complexity is that most human decisions involve higher level concepts, and higher level concepts are predicated upon other concepts, and those lower level concepts are predicated upon even lower level concepts and so on. So we have interrelated levels of infinitude that are parceled by conceptualization. Lower animals, however, are easier to predict because they don't have this conceptual ability. They simply associate particulars with particulars, so their actions are relatively simplistic.