The Novikov Self-Consistency Principle
In the context of predestination, the Novikov Self-Consistency Principle states that any events that occur through time travel must be self-consistent, meaning that the outcome of any action cannot change the past, only the method of achieving it.
However, this raises the question: what happens if multiple time travelers with different goals and motivations interact with each other?
For example, let's say we have two time travelers, Alpha and Beta. Alpha is trying to prevent a catastrophe from occurring in the future, while Beta is trying to cause it. If they meet in the past, will their actions cancel each other out, or will they somehow... grandfather the outcome?
Or maybe, just maybe, they will somehow loop back into the timestream, creating an infinite cycle of causality.