Going back to the question at hand - what esle can be said that havent been said already? Its interesting what a huge debate it sparked when the answer is actually given. As we all (or most of us) know, and whats been said many times before in this thread, the novelization answers the question - Micheal Bichop/Bioshop II was a man
I dont know about A3 novelization, but in vast majority of the cases, and ESPECIALLY back in the days, the writer of the novelization worked closely with the director/writers of the movie. So Im prety confident Foster didnt just came up with it on the spot
Besides, this is a movie we're talking about. If Bishop weas a droid, for the sake of the story and audiences it would be shown/revealed in a fairly obvious matter - like white blood for example. yes, I know this also has been addressed many times in the thread, but some say he didnt have white blood to trick Ripley. While it may be a good explanation within the story, the movie itself needs something to show the audience that hes a robot - like with Ash in Alien. And there was no such thing in A3