Calvinist. R.C. Sproul, states: “But Adam and Eve were not created fallen. They had no sin nature. They were good creatures with a free will. Yet they chose to sin. Why? I don’t know. Nor have I found anyone yet who does know.” (Chosen By God, p.31)
This is problematic for the Calvinist argument, because their argument against Prevenient Grace is that it fails to determine action, by merely enabling a person to render a free choice, whether to accept what is put to them by God, or to reject it, and therefore it fails to answer the fundamental answer of why a person chooses what he does. And now you know, that the very same question also applies to Adam & Eve, which R.C. Sproul admits that he has never found anyone who can explain it. However, realize that Sproul could have stated that God determined their fall (due to sovereignty principles), and that's why they freely chose what they did, but he refused to go that far. Why?