Definitions for grandfather paradox
grand·fa·ther para·dox

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1. grandfather paradoxnoun

   The paradox of time travel that hypothetically occurs when one person goes back to the past and kills their biological grandfather before the latter fathered the traveller's father, thus, by extension, preventing the traveller to ever be conceived in the first place.

2. grandfather paradoxnoun

   An instance of the grandfather paradox.

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1. grandfather paradox

   A temporal paradox, time paradox, or time travel paradox is a paradox, an apparent contradiction, or logical contradiction associated with the idea of time and time travel. The notion of time travel to the future complies with current understanding of physics via relativistic time dilation, temporal paradoxes arise from circumstances involving hypothetical time travel to the past and are often used to demonstrate its impossibility. In physics, temporal paradoxes fall into two broad groups: consistency paradoxes exemplified by the grandfather paradox; and causal loops. Other paradoxes associated with time travel are a variation of the Fermi paradox and paradoxes of free will that stem from causal loops such as Newcomb's paradox.

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1. Grandfather paradox

   The grandfather paradox is a proposed paradox of time travel first described by the science fiction writer René Barjavel in his 1943 book Le Voyageur Imprudent. The paradox is described as following: the time traveller went back in time to the time when his grandfather had not married yet. At that time, the time traveller kills his grandfather, and therefore, the time traveller is never born when he was meant to be. Despite the name, the grandfather paradox does not exclusively regard the impossibility of one's own birth. Rather, it regards any action that makes impossible the ability to travel back in time in the first place. The paradox's namesake example is merely the most commonly thought of when one considers the whole range of possible actions. Another example would be using scientific knowledge to invent a time machine, then going back in time and impeding a scientist's work that would eventually lead to the very information that you used to invent the time machine. An equivalent paradox is known as autoinfanticide, going back in time and killing oneself as a baby. The grandfather paradox has been used to argue that backwards time travel must be impossible. However, a number of hypotheses have been postulated to avoid the paradox, such as the idea that the past is unchangeable, so the grandfather must have already survived the attempted killing; or the time traveller creates - or joins - an alternate timeline or parallel universe in which the traveller was never born.

How to pronounce grandfather paradox?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say grandfather paradox in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of grandfather paradox in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of grandfather paradox in Pythagorean Numerology is: 1

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Grandfather_Paradox
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Grandfather_Paradox
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=grandfather paradox