Single Idea 23019

[catalogued under 27. Natural Reality / D. Time / 2. Passage of Time / j. Time travel]

Full Idea

Lewis says a journey only counts as interesting time travel if there is a disparity between personal time and external time. …It is also necessary that the person at the beginning of the journey is the same as the person at the end of the journey.

Gist of Idea

The interesting time travel is when personal and external time come apart


report of David Lewis (The paradoxes of time travel [1976]) by Baron,S/Miller,K - Intro to the Philosophy of Time

Book Reference

Baron,S/Miller,K: 'Introduction to the Philosophy of Time' [Polity 2019], p.194

A Reaction

Other cases would presumably be the whole of time accelerating or slowing, or going into reverse.