Again, you're only thinking of sin as something one does, and you're completely ignoring Adam's heart.Well, the scriptures state that the wages of sin IS death. W/O sin, there could have been no way for Adam dying. God told Adam that if/when he ate of that tree, he would SURELY die. If Adam' heart was corrupted pre-fruit ingestion...[snip arbitrary assumption]...then he must have sinned outside the parameters God had already set.
Adam and Eve new they didn't have to as far as actually pick the fruit and ingest it. Neither shall ye touch it, lest ye die. To this the words of Christ also agree. He who commanded Adam and Eve not to eat the fruit of the tree in the midst of the Garden, also commands us not to kill or to commit adultery. In Matthew 5 where Christ establishes the true force and scope of God's commandments to be directives also to the thoughts and feelings of the heart, where anger is judged as murder and lust as adultery (because that is what they are), it becomes absolutely indisputible that all Adam had to do was desire the fruit, and he had eaten in his heart.
As I said, until you see the validity of the premise, it serves no purpose to identify the corrupting influence.Now, again, what sin did Adam commit to cause corruption OUTSIDE of eating the fruit? Or better yet, where did his sinning come from? God? Satan putting it there, or Adam's failing to heed God's command(rebellion)?