What was the grandfather cause?

The grandfather paradox is a thought experiment in time travel that raises the question of what would happen if a person were to travel back in time and prevent their own grandfather from meeting their grandmother. This scenario creates a logical inconsistency: if the grandfather never meets the grandmother, then the time traveler would never be born, thus preventing them from traveling back in time to cause the initial event. The paradox highlights the complexities and contradictions that arise when considering time travel and causality.