Knowing good and evil is the lie, assuming we accept the premise that God is Evil Blind.
Here's a thought. God is Evil Blind. God has created this perfect world, at least within the confines of the garden. Just as a person knows they are color blind, God knows he's Evil Blind, so he wants his ultimate creation, man and woman, to be like him. After all they were created in his image.
But there's that pesky tree. Lets call it the Smart Tree. Hillbilly God doesent want his ultimate creation to be smarter than him, no reaching out for higher education. So , God being the Supreme being he is, says don't eat from that tree. Along comes the serpent ( in many cutlers being a symbol of wisdom ) naw, eat from the tree, it'll make you smart, like God. What it does is, it makes them smarter than God, because theyare not Evil Blind.
In a petty tantrum God curses them, than kicks them out of the Garden into the harsh cold reality of life. Not only is God Evil Blind, he is also a petty tyrant. Case in point; the flood. In a snit God attempts to wipe out not only the human race, but every thing tha creeps, and crawls. Thus the redaction and insert of Noah. Otherwise the whole time line and redemption idea is no longer valid.
God....Evil Blind and petty, stuck with an ultimate creation smarter than He, Tuff being a Supreme being, eh?