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The "predestination paradox" is a concept in time travel and temporal mechanics, often explored in science fiction. It occurs when a future event is the cause of a past event, which in turn becomes the cause of the future event, forming a self-sustaining loop in time.
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.
Black hole information paradox: Black holes violate a commonly assumed tenet of science that information cannot be destroyed. Ehrenfest paradox : On the kinematics of a rigid rotating disk. Ladder paradox : Introductory relativity problem about a ladder, a barn, and simultaneity.
The transformation relies on the trace operation, which summarizes aspects of the matrix. If this trace term is zero ([†] =), it indicates that the transformation is invalid in that context, but does not directly imply a paradox like the grandfather paradox. Conversely, a non-zero trace suggests a valid transformation leading to a unique ...
Not a category for all paradoxes involving time, such as the twin paradox or Zeno's paradoxes. Pages in category "Temporal paradoxes" The following 6 pages are in this category, out of 6 total.
The chronology protection conjecture is a hypothesis first proposed by Stephen Hawking that laws of physics beyond those of standard general relativity prevent time travel—even when the latter theory states that it should be possible (such as in scenarios where faster than light travel is allowed).
Greg Clark raised concerns that the UK Research and Innovation’s science and research funding could be slashed by nearly a quarter PM facing demands to explain ‘paradoxical’ potential cuts ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 27 January 2025. Problem of the lack of evidence for alien life despite its apparent likelihood This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between ...