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  2. Temporal paradox - Wikipedia

    en.wikipedia.org/wiki/Temporal_paradox

    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.

  3. Ship of Theseus - Wikipedia

    en.wikipedia.org/wiki/Ship_of_Theseus

    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.

  4. List of paradoxes - Wikipedia

    en.wikipedia.org/wiki/List_of_paradoxes

    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.

  5. Quantum mechanics of time travel - Wikipedia

    en.wikipedia.org/wiki/Quantum_mechanics_of_time...

    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 ...

  6. Category:Temporal paradoxes - Wikipedia

    en.wikipedia.org/wiki/Category:Temporal_paradoxes

    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.

  7. Chronology protection conjecture - Wikipedia

    en.wikipedia.org/wiki/Chronology_protection...

    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).

  8. 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 ...

  9. Fermi paradox - Wikipedia

    en.wikipedia.org/wiki/Fermi_paradox

    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 ...