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  2. List of paradoxes - Wikipedia

    en.wikipedia.org/wiki/List_of_paradoxes

    Therefore, it is not opposite day, but if you say it is a normal day it would be considered a normal day, which contradicts the fact that it has previously been stated that it is an opposite day. Richard's paradox: We appear to be able to use simple English to define a decimal expansion in a way that is self-contradictory.

  3. Paradox - Wikipedia

    en.wikipedia.org/wiki/Paradox

    A paradox is a logically self-contradictory statement or a statement that runs contrary to one's expectation. [1] [2] It is a statement that, despite apparently valid reasoning from true or apparently true premises, leads to a seemingly self-contradictory or a logically unacceptable conclusion.

  4. Zeno's paradoxes - Wikipedia

    en.wikipedia.org/wiki/Zeno's_paradoxes

    [1] [2] Diogenes Laërtius, citing Favorinus, says that Zeno's teacher Parmenides was the first to introduce the paradox of Achilles and the tortoise. But in a later passage, Laërtius attributes the origin of the paradox to Zeno, explaining that Favorinus disagrees. [3] Modern academics attribute the paradox to Zeno. [1] [2]

  5. Irresistible force paradox - Wikipedia

    en.wikipedia.org/wiki/Irresistible_force_paradox

    The problems associated with this paradox can be applied to any other conflict between two abstractly defined extremes that are opposite. One of the answers generated by seeming paradoxes like these is that there is no contradiction – that there is not a false dilemma. Christopher Kaczor suggested that the need to change indicates a lack of ...

  6. Paradoxical reaction - Wikipedia

    en.wikipedia.org/wiki/Paradoxical_reaction

    A paradoxical reaction (or paradoxical effect) is an effect of a chemical substance, such as a medical drug, that is opposite to what would usually be expected. An example of a paradoxical reaction is pain caused by a pain relief medication .

  7. Grelling–Nelson paradox - Wikipedia

    en.wikipedia.org/wiki/Grelling–Nelson_paradox

    The Grelling–Nelson paradox arises from the question of whether the term "non-self-descriptive" is self-descriptive. It was formulated in 1908 by Kurt Grelling and Leonard Nelson , and is sometimes mistakenly attributed to the German philosopher and mathematician Hermann Weyl [ 1 ] thus occasionally called Weyl's paradox or Grelling's paradox .

  8. Abilene paradox - Wikipedia

    en.wikipedia.org/wiki/Abilene_paradox

    The Abilene paradox is a collective fallacy, in which a group of people collectively decide on a course of action that is counter to the preferences of most or all individuals in the group, while each individual believes it to be aligned with the preferences of most of the others.

  9. Binary opposition - Wikipedia

    en.wikipedia.org/wiki/Binary_opposition

    A binary opposition (also binary system) is a pair of related terms or concepts that are opposite in meaning.Binary opposition is the system of language and/or thought by which two theoretical opposites are strictly defined and set off against one another. [1]