Objection: if divine knowledge eternally determines what will occur, why affirm a separate attribute of will?
The reply assigns disclosure to knowledge and specification to will. Knowledge concerns what is the case, while will is related to the particular occurrence of a possible state. This distinction does not make the attributes independent gods.
One may distinguish a craftsperson's knowing how a task will be done from choosing a particular task. That human example only illustrates two meanings; it does not imply that divine knowing and willing involve human indecision, tools, or the acquisition of capacities.