If we were all the same person, all chess games would end in a tie. There is no one on in this universe exactly like me, or any of you for that matter. They can try to imitate to the best of their abilities, but at the end of the day we all have unique experiences. There isn't a chance I'd be reincarnated as anyone else. First of all, if I had been reincarnated, I'd have some previous consciousness trying to control me. Believe what you want, good luck proving it.