i sorta like Mark's original question:
My name is Mark and I am a robot.
I am 19 years old and I attend a university with other people, but you know, I just don't feel like I fit in because I am a robot. It is a fact that I am a robot in the sense that I am really a machine processing a bunch of computations, but it is universally agreed by others that I am a human. Unfortunately, there is no known way to prove that I am human since I am indistinguishable from a human being.
I have all the features of a human. I have all the same organs and stuff that humans have, including a brain that is indistinguishable from a human brain. I can engage in seemingly intelligent conversation. I occasionally forget information just as humans do and I can contract all the diseases that humans can.
Actually, I was even programmed to convince you that I am a robot. You might think that there are actually "thoughts" in my mind, but really, I have no understanding at all of what I am doing. I am simply reacting to my environment according to rules specified in my memory. Even though I exhibit "morality" like humans, there is no "conscience" at all going on in my brain/processor/memory thing. I am aware of nothing even though it may seem that I am aware of stuff.
Sorry about my poor writing style and word choice and sentence structure. I am quite tired right now since I did not have enough sleep last night and I am having a lot of anxiety since I am new here.
So, is Mark a robot? Are you a robot? I have no idea. It might seem like you are all thinking and understanding stuff, but I can't know for sure if that is what is really happening.
I don't really know what I am asking though all this, but I know there is some kind of underlying question.