time travel is metaphysically impossible. what is the past? that which once existed but no longer does what is the present? that which exists what is the future? that which has the potential to exist but does not yet. time travel is impossible because different times are not locations that can be travelled to, they are by definition things that do not exist, and you can't go to a place that does not exist anymore than you can physically go to neverland or middle earth.
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