The expression “free decision” was understood to refer not only, as its grammar as a concrete term suggests, to a certain kind of act, but also to the capacity or capacities whose exercise such an act involves. The word “decision” was standardly taken to involve a reference to reason and “free” a reference to the will. Thus, it was often asked whether “free decision” refers to an act of reason or of the will, and whether the capacities that such an act involves are reason or will, either alone or in combination, or possibly other capacities besides these.