Free knowledge is the free act of God’s will where He, after His free act of creation, knows all things that are going to happen and that this knowledge is contingent upon His free creative will. Therefore, the free knowledge of God would be different if He had chosen a different creative fiat. In other words, because God created one possible existence instead of another, the range of His knowledge regarding actual existence would have been different had He created something different in the first place. (See also Natural knowledge and Middle Knowledge).
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