Take Parfit’s teletransporters, add “someone’s modus ponens is another’s modus tollens,” throw in a dash of existentialism, and you’ll get “The Machine“, an interesting philosophy comic from Existential Comics (there are some other goods ones there, too; be warned that at least one of them is bit racy). See also John Weldon’s animated story about teletransportation, “To Be” (though note that the closed-captioning is rather wonky, and it may be better to turn it off if you don’t need it).