ok, this is not an "is it possible" thread, more of a theoretically exploratory thread. tl;dr look at this theoretical possibility: you go to teleport, and your copy comes out the other side. but some glitch means you stay on the originating side. now there are two of you, both with your thoughts and memories. who is the real one. you of course? but that problem still exists whether there was a glitch or not. is the being on the other end EVER really you? same goes for mind uploading (saving your consciousness on a computer hard drive for later transfer). there is no reason to believe what is left after the copy is you. and not from a religious sense, but purely logical. rest of the post I have always been interested in the idea of teleportation. obviously in the "get places quicker sense" and the "get across the universe sense", but that's the start. what really intrigues me, is who comes out of the teleporter at the other end? assuming it works as common sci-fi suggests, where it downloads your thoughts and then re-assembles your molecules across the universe, and then uploads your thoughts. who comes out? would it actually be you? or would the you that is actually you have died when they stepped into the transporter at the start? just because the entity on the other end has your thoughts and beliefs doesn't make them you. what do you think?