The short film "To Be" [1] is a fun exploration of this idea. (The animation is a bit crude, but it's worth watching. There's a low-quality version on YouTube [

The short film "To Be" [1] is a fun exploration of this idea. (The animation is a bit crude, but it's worth watching. There's a low-quality version on YouTube [2].) The same paradox is a major plot point in Christopher Nolan's The Prestige, and in Stanislaw Lem's Star Diaries. [1] https://en.wikipedia.org/wiki/To_Be_(1990_film) https://en.wikipedia.org/wiki/To_Be_(1990_film) [2] https://www.youtube.com/watch?v=KUXKUcsvhQc https://www.youtube.com/watch?v=KUXKUcsvhQc