I cannot be precise in my answer because you are not being precise in the kind of question you are asking. Are you asking: What were the effects of sin on the beings of Adam and Eve, and then on the entire human race as a result of Adam's sin?
Or, are you asking to know more about the internal workings of individual human beings and the impact of Adam's sin, more information than God has revealed? I will not go any further than what God has revealed in Scripture.
The Scriptures are my ultimate authority.
Oz
How do you deal with all the legal, ethical, and moral issues not directly handled in the inspired text, then? More things are excluded from the text than are included.
How, for instance, would you specifically determine abortion was/was not murder without having some view of when life begins prior to physical birth?
If you're Trinitarian, you've already gone beyond interpretation to inference by conclusion and deduction; but that's quite difficult for most to ever see or admit.
Original Sin is a huge part of Christian indoctrination. I'd just like to see believers have an actual understanding of the "why" and the "how" of sin in our members rather than just subscribing to a rote default doctrine given us by, in my opinion, one of the least credible early saints. (He was also the "grandfather of the Filioque", which ultimately brought the 1054 Schism.)
So... I'm asking... What specific affect did the Edenic serpent/fruit-eating encounter have on man's spirit, man's soul, and man's body? And how did it affect the internally-integrated workings of them relative to each other? How was this passed on from Adam and Eve if it was?
"What" is a "sin nature", and "where" is it in man's constitution? Was it an addition of a "something"? Was it a deletion of a "something"? Was it a modification of "something/s"?
How did sin affect Adam's soul in relation to his spirit and his body? How does sin affect man's soul in relation to his spirit and his body?
Why is it that sin and/or death entered through Adam if Eve, being deceived, was in the transgression?
Rather than an adamant declaration and adherance to a few conceptualized paragraphs of man's doctrine, I'd like to see someone answer more substantial questions that are about practical functionality. Adding Original Sin to a creed of faith is often no better than chanting verses to pledge a fraternity, just like most other formulated doctrines.
Is death physical, spiritual or both? Immediate or eventual? There are many internal questions within Original Sin as a doctrine, and various views on it.
I think it's inadequate and, thus, fallacious.