If interpreted literally then the story of Adam & Eve is indeed a nonsense that no person of sound mind could entertain. But if understood, as it is by the majority of theists that I know, as being analogous to the awakening of mankind to it’s duel nature i.e. it’s physical and spiritual natures, then it can be understood in it’s proper context. Adam represents man’s physical nature and Eve represents man’s spiritual nature. The serpent represents the ego and attachment to the material world. Adam, Eve and the serpent are all aspects of our nature, they are present in all of us.
Nicely summarized! The logic of Christianity is almost as bad as its morality.