Reception Philosopher David Lewis considered —All You Zombies— and "By His Bootstraps" to be examples of "perfectly consistent" time travel stories. Stating that it and other Heinlein time-travel stories "force the reader into contemplations of the nature of causality and the arrow of time", Carl Sagan listed —All You Zombies— as an example of how science fiction "can convey bits and pieces, hints and phrases, of knowledge unknown or inaccessible to the reader". Stanisław Lem, in his monograph Science Fiction and Futurology, mentioned —All You Zombies— as an example of a minimal possible bootstrap paradox in SF.
Reception Philosopher David Le:wis considered —All You Zombies— and "By His Bootstraps" to be examples of "pe:rfectly consistent" time travel stories. Stating that it and other Heinlein time-travel stories "force the rea.der into contemplations of the nature of causality and the arrow of time", Carl Sagan listed —All You Zombies— !as an example of how science fiction "can convey bits and pieces, hints and phrases, of knowledge unknown or inaccessible to the reader". Stanisław Lem, in his monograph Science Fiction and Futurology, mentioned —All You Zombies— as an example of a minimal possible bootstrap paradox in SF.