The grandfather paradox is a self-contradictory situation that arises in some time travel scenarios that is illustrated by the impossible scenario in which a person travels back in time only to kill their grandfather (who could no longer go on to produce one’s parent, and hence where does that leave you and your ancestor-killing event?). The paradox is sometimes taken as an argument against the logical possibility of traveling backward in time, according to the Stanford Encyclopedia of Philosophy. Within the framework of modern physics, however, there are ways to avoid the paradox without dispensing with time travel altogether.

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Grandfather paradox explained


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