Quantum immortality is the assertion that theMany-worlds interpretation of quantum mechanics and pattern identity theory imply immortality or, more aptly, that one should expect one’s subjective experience to persist indefinably. The basics of the argument is as follows: No matter how likely you are to die in a given situation, there is always a greater-than-zero percentage of worlds in which you survive. As one can’t experience nonexistence, there will always be a “you” that continues, no matter how unlikely such a continuity is objectively.