So when the sinner burns in hell - the sins he pays for via the torment of fire and brimstone Rev 14:10 - is not the sin of Adam - but his own sin.

As it obviously can't be both pre and post, how can the belief of both be advocated in allowing both to be believed?

So when the sinner burns in hell - the sins he pays for via the torment of fire and brimstone Rev 14:10 - is not the sin of Adam - but his own sin.

To me, trying to evade the implications of what Paul is saying is, as we say here, trying to block the sunlight with a sieve.

It's obvious we share Adam's guilt.

Ellen White says this clearly.

I hadn't yet realized why SDA theologians stay on the fence about this subject, but what you said opened my eyes. If sin is just an act of the will, nobody is born in sin, and if theologians assume the position that man is born in sin they will automatically be assuming the pre-fall position, and they can't do that, since the Church allows for both positions.

Sin is a personal matter. A man is guilty only of his own sins, and not of those which another has committed. Now I can not sin where I am not, but only where I am. Sin is in the heart of man; "for from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness; all these evil things come from within." Mark 7:21-23. "The heart is deceitful above all things, and desperately wicked." Jer.17:9. Sin is in every fiber of our being by nature. We are born in sin, and our life is sin, so that sin can not be taken from us without taking our life. What I need is freedom from my own personal sin,--that sin which not only has been committed by me personally, but which dwells in the heart,--the sin which constitutes the whole of my life.

"His own iniquities shall take the wicked himself, and he shall be holden with the cords of his sins." Prov.5:22. "For though thou wash thee with niter, and take thee much soap, yet thine iniquity is marked before Me, saith the Lord." Jer.2:22. My sin is committed by myself, in myself, and I can not separate it from me. Cast it on the Lord? Ah, yes, that is right, but how? Can I gather it up in my hands, and cast it from me, so that it will light upon Him?--I can not. If I could separate it but a hair's breadth from me, then I should be safe, no matter what became of it, since it would not be found in me. In that case I could dispense with Christ; for if sin were not found on me, it would make no matter to me where it was found. If I could gather up my sins so as to lay them upon Christ crucified apart from me, then I would not need to put them on Him. They would then be away from me, and that would clear me. But no works of any kind that I can do can save me; therefore, all my efforts to separate myself from my sins are unavailing.

Christ Bears the Sin in Us.

It is evident from what has been said that whoever bears my sins must come where I am, yea, must come into me. And this is just what Christ does. Christ is the Word, and to all sinners, who would excuse themselves by saying that they can not know what God requires of them, He says, "The Word is very nigh unto thee, in thy mouth, and in thy heart, that thou mayest do it." Deut.30:11-14. Therefore, He says, "If thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised Him from the dead, thou shalt be saved." Rom.10:9. What shall we confess about the Lord Jesus?--Why, confess the truth, that He is nigh thee, even in thy mouth and in thy heart, and believe that He is there risen from the dead. "Now that He ascended, what is it but that He also descended first into the lower parts of the earth?" Eph.4:9. The risen Saviour is the crucified Saviour. As Christ risen is in the heart of the sinner, therefore, Christ crucified is there. If it were not so, there would be no hope for any. A man may believe that Jesus was crucified eighteen hundred years ago, and may die in his sins; but he who believes that Christ is crucified and risen in him, has salvation.

All that any man in the world has to do in order to be saved, is to believe the truth, that is, to recognize and acknowledge facts, to see things just as they actually are, and to confess them. Whoever believes that Christ is crucified in him, which is the fact in the case of every man, and confesses that the crucified Christ is also risen, and that He dwells in him by and with the power of the resurrection, is saved from sin, and will be saved as long as he holds fast his confession. This is the only true confession of faith. (Waggoner, the Glad Tiding)

Sin is in every fiber of our being by nature. We are born in sin, and our life is sin ...

If we are born in sin, could you define what sin is in a baby?

"All have sinned" includes infants. It even includes infants still in the womb.