It's ambiguous in the film and far more interesting if he's not, as it becomes an interrogation of what makes us human, and forces us to accept our imperfection

It's ambiguous in the film and far more interesting if he's not, as it becomes an interrogation of what makes us human, and forces us to accept our imperfection and that of our fellow man. Well, besides that you know, the obvious implications for the rights of intelligent beings, natural or not, but since we won't have strong AI for a while and it wasn't about animal rights no matter how much you stretch it, we're left with questions about our own nature and how we relate to other humans.