Being outwitted is not being deceived, being deceived is another thing. The serpent deceived Eve, he did not outwit her, as Paul teaches us. While the serpent is called subtil, and cunning or clever, what is meant there, includes lying. Satan is the father of lies, and while being outwitted is your own fault, objectively, being deceived is not your fault, just as objectively. That you are deceived, is the liar's fault, not yours.