"It's hard to tell these days. Earth is home to strange creatures. What are you?"

"I am a scientist and thus I am curious, it is in my nature to ask questions. I am called Android 21."

"You give off radioactive molecules not found on earth. Aside from that, I have no date compiled on you, but by your appearance you aren't from earth."

"I am a born researcher, I am far less interested in your designation, than I am of your power."