truar

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English

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Etymology

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By analogy to the word liar for one who lies.

Noun

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truar (plural truars)

  1. One who always tells the truth.
    • 1980, David H. Ahl, Computers in Mathematics: A Sourcebook of Ideas, page 42:
      The third person is either an Anania (liar) or a Diogene (truar).
    • 2012, Wayne A. Wickelgren, How to Solve Mathematical Problems, →ISBN:
      From this information, can you determine how many of the three are liars and how many are truars?
    • 2013 -, David Gries, Fred B. Schneider, A Logical Approach to Discrete Math, →ISBN, page 106:
      The country of Marr is inhabited by two types of people: liars always lie and truars always tell the truth —sounds like a knight-knave problem, eh?

Usage notes

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This term is used almost exclusively for logic puzzles.

Anagrams

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Dalmatian

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Etymology

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From Latin trahere, present active infinitive of trahō (I pull).

Verb

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truar

  1. to throw