If time travel was invented, does that mean it’s always existed?
This thought depends on one’s perspective and the specific model of time travel being considered. Some theories of physics, such as the Novikov self-consistency principle and the grandfather paradox, suggest that the ability to travel through time would imply the existence of a self-consistent, predetermined timeline in which events are immutable. In this view, time travel would always have existed, but the ability to access it would be limited by our technological capabilities.
On the other hand, other theories of physics, such as the many-worlds interpretation of quantum mechanics, suggest that the act of time travel could create new, parallel timelines. In this view, time travel would not have always existed, but would come into existence as a result of the act of time travel itself.
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