Is it possible you are confusing what Adam's and Eve's condition was BEFORE the Fall with that AFTER the Fall? Pink was focusing upon the relationship of God, man and the Fall before Adam's transgression, i.e., God cannot be found guilty of making or forcing Adam to sin just because He ordained that he would. Pink makes it very clear that God did not alter Adam's nature so that he had no choice to not sin but did so under irresistible compulsion out of his own corrupt nature. No... Adam was created upright, aka: very good; perfect. Our first parents had the ability to sin (posse peccare) and the ability to not sin (posse non peccare) but they were not guaranteed that they would not sin (non posse non peccare).

Now, after the Fall, what God promised in His warning took place, "And Jehovah God commanded the man, saying, Of every tree of the garden thou mayest freely eat: but of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die." (Genesis 2:16-17) Thus, on that very day, Adam and Eve "died", which we understand as being a 3-fold death: spiritual (immediate), temporal (gradual), and eternal (final condemnation). This "curse" or punishment that came upon Adam and all his posterity, we call "Original Sin". It consists of two parts: 1) Depravity/corruption of nature and 2) Guilt. All descendants of Adam are born with a corrupt nature (Total Depravity); it is inherited. And, all descendants of Adam have his guilt imputed to them; i.e., all are guilty before God in Adam, just as if they had been the one to eat of the fruit of that tree. (cf. Rom 5:12-18)

Does this help?

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simul iustus et peccator

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