According to the standard definition of time travel due to David Lewis, an object time travels if and only if the separation in time between departure and arrival does not equal the duration of its journey. After arguing that the standard definition o...
According to the standard definition of time travel due to David Lewis, an object time travels if and only if the separation in time between departure and arrival does not equal the duration of its journey. After arguing that the standard definition of time travel is inadequate by discussing a world with circular time, I suggest a new definition of time travel that does not fail in situations involving circular time.