You are right, and that's what's so brilliant about it. Deckard barely shows emotions nor connections to the world. At times it feels like his detective persona

You are right, and that's what's so brilliant about it. Deckard barely shows emotions nor connections to the world. At times it feels like his detective persona is just an act, just like his humanity could just be an act - no matter whether he is human or a knowing or not-knowing replicant.