"Wait. I need you to answer some questions. How could you be my clone? And where is this place? How did I get here? Is there a way to get back to Earth?"
The man in the next cell sighed, then said "To answer your first question, I'm not your clone."
Charlie was confused. "But you just said ..."
"I said that I was a clone and that we're exactly the same."
"You mean ... I'm a clone too?"
"Ding ding ding! Give the man a prize."
"B-but I ... I remember my life."
"False memories. All clones of the same person have the same exact memories. It's like we come off of an assembly line or something." He paused. "Roll up your left sleeve and look just below your elbow. The number that you'll see is your product number. My number is fourteen."
Charlie hesitated. All of this was insane, right? He couldn't be a clone. Could he?
But he had to be sure, so he did as the man asked. He took off his suit jacket and then rolled up the sleeve of his shirt. When he looked just below his elbow, he saw ...