ABSTRACT
Within the philosophical tradition of personal identity, Derek Parfit’s (1986) puzzling cases are quite famous. He invents imaginary stories such as a person being teletransported from Earth to Mars. A scanner records and afterwards destroys the brain and body of the traveling person, and sends this information by radio at the speed of light to a machine on Mars that makes an exact organic replica of this person out of new matter. This travel takes a few minutes during which the person on Earth loses consciousness after having entered the teletransporter and pushed a green button to start the scanning process. It is in the replica that the person will regain consciousness on Mars. The interesting question now is: if the person entering the teletransporter were ourselves, would we push the green button and think that the replica is ourselves?
