The grandfather paradox raises questions about causality from "summary" of Time Travel in Einstein's Universe by J. Richard Gott
The grandfather paradox is a classic example that demonstrates the potential problems that can arise when contemplating time travel. Imagine a scenario where a person travels back in time and prevents their grandfather from meeting their grandmother. This would mean that the time traveler's parents would never have been born, which in turn means that the time traveler themselves would never have been born. This creates a paradoxical loop where the time traveler's existence is both necessary and impossible simultaneously. One of the key issues that the grandfather paradox raises is the question of causality. Causality is the concept that an event is caused by a preceding event, and it plays a ...
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