Therefore, it seems to be impossible for people to become immortal through quantum immortality. Nevertheless, the idea remains a fascinating and thought-provoking concept within the realm of theoretical physics, but it is not yet a proven or established scientific fact.

During this time, Everett met Nancy Gore, who typed up his paper "Wave Mechanics Without Probability". He married her the next year.

Renamed many-worlds Everett had referred to the combined observer–object system as split by an observation, each split corresponding to the different or multiple possible outcomes of an observation. These splits generate a branching tree, where each branch is a set of all the states relative to each other.

Quantum immortality refers to the subjective experience of surviving quantum suicide. This concept is sometimes conjectured to be applicable to real-world causes of death as well.