The Differences Between Middle Knowledge and Natural Knowledge

Scientia-media or middle knowledge is God's knowledge of what free creatures would freely do in any circumstances in which God might create them. So for example, he knew what you would have done if you had been the Roman procurator of Judea in the first century and then one of the twelve disciples. This kind of knowledge is also thought to be explanatory prior to his creative decree of a world. It's not like natural knowledge because creatures could freely choose to do differently.