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Grandfather paradox: If one travels back in time and kills their grandfather before he conceives one of their parents, which precludes their own conception and, therefore, they could not go back in time and kill their grandfather. Polchinski's paradox: A billiard ball can be thrown into a wormhole in such a way that it would emerge in the past ...
The grandfather paradox encompasses any change to the past, [13] and it is presented in many variations, including killing one's past self. [14] [15] Both the "retro-suicide paradox" and the "grandfather paradox" appeared in letters written into Amazing Stories in the 1920s. [16]
A paradox is a logically self-contradictory statement or a statement that runs contrary to one's expectation. [1] [2] ... The grandfather paradox, for example, ...
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[91] [92] The paradox is commonly described with a person who travels to the past and kills their own grandfather, prevents the existence of their father or mother, and therefore their own existence. [44] Philosophers question whether these paradoxes prove time travel impossible.
The Grandfather Paradox comes up in ‘The Umbrella Academy' Episode 3 when Five and Lila search for answers at the Commission Here's what the paradox means.
As the parts of the ship are replaced, the question remains as to whether the same ship remains throughout. The Ship of Theseus, also known as Theseus's Paradox, is a paradox and a common thought experiment about whether an object is the same object after having all of its original components replaced over time, typically one after the other.
The question of killing baby Hitler contains a version of the grandfather paradox, [20] also known as the "Hitler's Murder Paradox". [21] According to the B-theory of time, [22] if someone travelled back in time with the intention of killing baby Hitler, then their reason for travelling back in time would be eliminated.