Yes, I have already answered this, but I will respond again.

Yes, in a certain sense, the promise was fulfilled, but in another, tragic sense. The scene itself shows that the serpent does not speak a complete lie, but rather a truth mixed with deception: he promises knowledge, yet does not say that the result will be death, shame, and exile. In the end, Adam and Eve come to know good and evil through the Fall, through the inner experience of separation from God. They already knew good, but the knowledge of evil led them into sin.
God’s words confirm that the human being did in deed acquire the knowledge of good and evil, but this is immediately linked to expulsion from Eden. Thus, “to be like God” here does not mean becoming like God in holiness or authority; rather, it means that the human being presumptuously claims the right to judge, which leads to the Fall. Sin often promises an expansion of freedom, but in reality brings bondage. The serpent uses a half truth: he does not merely deceive with words, but pushes toward distrust in God, toward a desire for independence, and toward suspicion that God’s command conceals some great good from humanity. Not every “truth” is good; a lie can be built upon a real fact but serve a destructive purpose. One should trust God rather than attempt to act independently.
Yes, the serpent’s words were partially fulfilled, but that is precisely why they became a trap - the human being gained a kind of knowledge that severed them from life with God and thus became knowledge of the fall and of sin.