Logical Contradictions of Time Travel are also known as time travel paradox, temporal paradox, or time paradox. These are apparent contradictions related to time and time travel. In physics, Time Travel Paradoxes are classified into consistency paradoxes, such as the grandfather paradox and causal loops. Other paradoxes related to time travel include a variant of the Fermi paradox and free will paradoxes arising from causal loops, such as Newcomb’s paradox.
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What is the Time Travel Paradox?
The time travel paradox is an apparent or logical contradiction associated with the idea of time and time travel. The time travel paradox is also called a temporary paradox or time paradox.
There are two broad groups of time travel paradoxes in physics. First, consistency paradoxes are imitated by grandfather paradoxes and causal loops. Other paradoxes associated with time travel are the Fermi paradox, a form of the paradox of free will, and Newcomb’s paradox. All are explained below.
Causal loop
A Causal loop is a paradox of time travel that occurs when a future event causes an event in the past, which in turn causes a future event when both events are present in spacetime, but their origin Cannot be determined. A Causal loop may include an event, person, object, or information. The terms bootstrap, foreseeable, or ontological paradox are sometimes used in fiction to refer to a causal loop.
Grandfather paradox
Grandfather paradox occurs when the past is altered, thus creating a paradox. A time traveler can do anything that has happened but cannot do anything that has not happened to do something with no contradiction. Therefore, whenever it is possible to change the past, a Grandfather paradox Consistency Paradox arises. Know this in more detail.
Fermi Paradox
As such, the Fermi paradox refers to the apparent contradiction between various evidence of the existence of extraterrestrial civilizations elsewhere in our galaxy and the lack of probability estimates. But here, the Fermi paradox can be adapted to time travel in some way – if time travel is possible, where are all future visitors? The answer to this question may vary – “From time to time, travel is not possible, future visitors may not reach any arbitrary point in the past, or they may avoid identifying themselves Live in secret.”
Newcomb’s Paradox
Newcomb’s paradox is a thought experiment that contradicts the expected utility theory and strategic dominance theory. Thought experimentation often promotes work-causal reasoning and free will by allowing for “right prophets”: if the suitable predictors of the future exist, for example, if time travel is a mechanism for making correct predictions As present, then the absolute predictions would seem to be independently contradictory because decisions made explicitly for free would already know the true prophet.
Sources
- Lewis, D. (1976). The paradoxes of time travel. American Philosophical Quarterly, 13(2), 145-152.
- Wasserman, R. (2017). Paradoxes of time travel. Oxford University Press.
- Horwich, P. (1975). On some alleged paradoxes of time travel. The journal of philosophy, 72(14), 432-444.
- Eldridge-Smith, P. (2007). Paradoxes and hypodoxes of time travel.
- Wolpert, D. H.; Benford, G. (June 2013). (The lesson of Newcomb’s paradox)
- Divine Foreknowledge and Newcomb’s Paradox
- Leora Morgenstern (2010), Foundations of a Formal Theory of Time Travel
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