Mustard- A man that has no knowledge of good and evil can't be given a reason "why" he should refrain, other than a direct threat to his own physical experience, just a general consequence in a cause/effect relationship.
Yes, I would agree this sums up what transpired between Adam and God.
He could understand facts told to him. And logic. But since he didn't understand good from evil, right from wrong, navigating a world of free will would be like navigating a world of color when all you can see is gray.
All the more reason for him to have simply kept doing what he'd been doing all along until then. God couldn't have made it easier, even for someone that didn't know good from evil.