By the model of "teleportation" in the OPs image the duplicate stepping out of the teleporter would be a brand new entity that consciously cannot distinguish himself from the original. The duplicate might understand that he is a duplicate but from a pure sense point of view, from his memories and the way his body behaves and how he sees the world.... he would feel like he is the original. He's not the original. The original is dead. Physical continuity is broken when the original is destroyed. Therefore that person is dead. The type of teleportation is what makes the difference. There could be two types of "teleporter"; 1. Original steps into teleporter. Body is destroyed and analysed. Information is sent to destination, essentially a blueprint, and a new body is built and steps out of the other end. Duplicate is identical to original in every way. 2. Original steps into teleporter. Body is deconstructed and analysed. Information and deconstructed atoms are sent to destination and the original body is reconstructed using exactly the same atoms in the exact same configuration as before. Original steps out of the other end, literally the same body as it is still the original. Teleporter style 1 means death for the original and a fake copy that feels that he is the original. Teleporter style 2 means the original is literally teleported to the destination and reconstructed. Teleporter style 1 isn't really a teleporter at all. Just in the same way that if I reverse-engineer a device and then send that information to someone in France and they make an exact copy using that information isn't teleportation either. Teleporter style 1, the teleporter from the OP, is really just an information [i]transmitter[/i].