Relative to the set of facts concerning the time traveler's physical capacities and circumstances (functional weapon, good aim, no external interference), the time traveler can retro-kill their younger self.
(describing how functional ascription depends on an analyst's choices)
Dependent on or varying according to—meaning it changes based on different factors or viewpoints.
Set of facts(as used in logic)
A collection of true statements or information about a situation that we're treating as established and real.
retro-kill(Time-travel thought experiments)
The act of a time traveler killing a person in the past, particularly a version of themselves or an ancestor whose survival is a precondition of the time traveler's existence.
A way out of the paradox was suggested by David Lewis (1976) who argued that the ability of killing somebody should be understood as a possibility compossible with the relevant fact. As an opera singer, for example, you are able to sing operas, since you have the physical capacity and training to do so, but because of a temporary loss of voice, you cannot hum a single tune. What you can do relative to one set of facts, is something you cannot do relative to another set of facts. This contextual