With any criminal case, the defendants are presented, their means and motives are detailed in an effort to determine the truth of the guilt or innocence of the accused. The same process is true in The Sin Paradox, the case against Adam, Eve, and the Serpent.
The difference is their guilt has been determined. Their punishments have been handed down. All that is left to discover is what their actual crime was. They clearly broke the commands of God. The question remains, what was that very specific overt action? What did they actually do which disobeyed God? What was mankind's first or Original Sin?
The actions of Adam, Eve, and the Serpent brought on themselves and all of creation the righteous judgment of God. What could two people who have nothing, not even clothing do to directly affect all of humanity, human history, even all of creation itself?