Let me add a bit more information from the scriptures.
"the serpent placed the seed of doubt putting the consequence into doubt while at the same time telling her she would be autonomous."
While that may be true, and scriptures are not exactly 100%, but, technically, Eve was the first "liar".
God told Adam:
"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.' -Gen. 2:16-17 (KJV)
When the "serpent" appeared to Eve, he said:
"Yea, hath God said, Ye shall not eat of every tree of the garden?" -Gen. 3:1 (KJV)
Then Eve replied:
"We may eat of the fruit of the trees of the garden: But of the fruit of the tree which is in the midst of the garden, God hath said, Ye shall not eat of it, neither shall ye touch it, lest ye die." -Gen. 3:2-3 (KJV)
Now, from what God told Adam, we know. But, where is it recorded that they couldn't even touch it?
Wasn't it their primary duty to dress and keep the Garden? (Gen. 2:15)
Now I admit, Adam
could have told her that, but I personally doubt it.
Now the best explanation I've read is the one Arthur Pink supplies.
Adam and Christ are contrasted. Adam, became a living soul, while the second Adam became a "life giving spirit".
You see, when Christ was manifested for us, He already knew evil from the good. Whereas Adam, in his human will, was created "innocent". In other words, Adam was able to be tempted and Christ couldn't.
Here, I quote Arthur Pink:
"In unfallen Adam the will was
free, free in
both directions, free toward good and free toward evil. Adam was created in a state of
innocency, but not in a state of holiness, as is so often assumed and asserted. Adam’s will was therefore in a condition of moral equipoise: that is to say, in Adam there was no constraining
bias in him toward either good or evil, and as such, Adam differed radically from all his descendants, as well as from “the Man Christ Jesus.”
So, too, with the Lord Jesus it was far otherwise: He also differed radically from unfallen Adam. The Lord Jesus Christ
could not sin because he was “the Holy One of God.” Before he was born into this world it was said to Mary, “The Holy Spirit shall come upon thee, and the power of the Highest shall overshadow thee: therefore also
that Holy Thing which shall be born of thee shall be called the Son of God” Luke 1:35. Speaking reverently then, we say, that the will of the Son of Man was
not in a condition of moral equipoise, that is, capable of turning toward either good or evil. The will of the Lord Jesus was
biased toward that which is good because, side by side with his sinless, holy, perfect humanity, was his eternal Deity."
Arthur W. Pink, The Sovereignty of God, Chapter VII, The Sovereignty of God and Human Will, Pt. 2: The Bondage of the Will
Now, one may suppose that had Adam not sinned, that life he had prior to sinning, would have continued for who knows how long. It could have been a few days, or a few years, but we know that just as "that old serpent" wouldn't leave our Lord alone very long, he would have been back sooner or later to try again.
God Bless
Till all are one.