No, they didn't know it was wrong, they were told it was wrong ... there's a difference. Satan told Eve something else and not knowing good from evil she went with it and so did Adam. You keep trying to invent ways that God didn't really mean what He said to fit the dictates of your "logic". I don't understand that inclination. He said what He meant and He meant what he said. How's that for a "premise?"On the original point about the effect of their eating of the Tree, just think it through. If all you do is accept the premise that God is just then that premise, by itself, is sufficient to prove your thesis false. Adam and Eve knew it was wrong to eat of that Tree because God told them not to eat of it and warned them of the consequences if they chose to disobey.