What ain't??
Before Man ever sinned; THIS was said:
Genesis 2:15-17Then the Lord God took the man and put him in the garden of Eden to tend and keep it. And the Lord God commanded the man, saying, Of every tree of the garden you may freely eat; but of the tree of the knowledge of good and evil you shall not eat, for in the day that you eat of it you shall surely die.
EVIL was already in existence at that time; or else KNOWLEDGE of it would be a non-existence thing.
Evil is by definition any rebellion against the will of God, so it is something that had to come into being after creation.