Imagine a world where the grandfather of the grandfather of the person who invented the time machine was a meddling, time-traveling buffoon.
Every time the inventor's grandfather's grandfather tries to fix a loose screw, the universe collapses in on itself, preventing the inventor's grandfather from being born.
This creates an infinite loop of paradoxical events, where the time machine is never built, and the inventor's existence is forever trapped in a never-ending cycle of nonexistence.
Back to Scenario 3: The Butterfly Effect's Butterfly Problem
Continue to Scenario 5: The Multiple Timelines' Multiple Problems