Liar - Paradoxes


Within any scenario where only "yes" or "no" answers are accepted, a person who we know is consistently lying would "paradoxically" be a source of truth if "yes" is sometimes the correct answer. There are many such paradoxes, the most famous being known as the liar paradox, commonly expressed as "This sentence is a lie," or "This sentence is false." The so-called Epimenides paradox ("All Cretans are liars," as stated by Epimenides the Cretan) is a forerunner of this, though its status as a paradox is disputed. A class of related logic puzzles are known as knights and knaves, in which the goal is to determine who, in a group of people, is lying and who is telling the truth.

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Other articles related to "paradoxes":

Christopher Jargocki - Selected Bibliography - Books
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Logicus - Topics in Logic - Implication: Strict or Material?
... into natural language by means of "if… then…", due to a number of problems called the paradoxes of material implication ... The first class of paradoxes involves counterfactuals, such as If the moon is made of green cheese, then 2+2=5, which are puzzling because natural language does not support the principle of ... Eliminating this class of paradoxes was the reason for C ...
Is Logic Empirical? - W.V. Quine
... this claim he cited the so-called paradoxes of quantum mechanics ... Birkhoff and von Neumann proposed to resolve those paradoxes by abandoning the principle of distributivity, thus substituting their quantum logic ... Logics"), Quine rejects the idea that classical logic should be revised in response to the paradoxes, being concerned with "a serious loss of simplicity ...
Mormon Scientist: The Life And Faith Of Henry Eyring - Overview - Paradoxes
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Famous quotes containing the word paradoxes:

    The so-called paradoxes of an author, to which a reader takes exception, often exist not in the author’s book at all, but rather in the reader’s head.
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    The paradoxes of today are the prejudices of tomorrow, since the most benighted and the most deplorable prejudices have had their moment of novelty when fashion lent them its fragile grace.
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