The knowledge of good and evil came after the partaking of the fruit of that tree.
Evil did not come into being in the Garden of Eden. Clearly and logically it existed before, according to Genesis.
"Evil did not come into being in the Garden of Eden. Clearly and logically it existed before, according to Genesis."
Just another hair splitter. Evil existed when Satan declared he wanted to be as God. Satan is a created being. He can in no wise be as God. Satan brought his evil to the Garden and imputed it to Adam through his empty promise, "Surely you will never die..."
Take it or leave it. It's your choice. Your free will choice.
Done.