Aren't all #TimeTravel stories really about the limitations of human knowledge? (Epistemic knowledge, at least.)
(Btw, I've never really liked the term #SciFi, bc it's not primarily the _science_ that's interesting in "Sci-fi" but the real world phenomena that are portrayed. One might say this genre term is a case of the "epistemic fallacy", ie conflating knowledge w/ what actually exists - which is how many people use the term "science".)

