Journal of Philosophical Logic

, Volume 30, Issue 6, pp 609–612 | Cite as

Some Thoughts about the Hardest Logic Puzzle Ever

  • Tim S. Roberts


“The Hardest Logic Puzzle Ever” was first described by the late George Boolos in the Spring 1996 issue of the Harvard Review of Philosophy. Although not dissimilar in appearance from many other simpler puzzles involving gods (or tribesmen) who always tell the truth or always lie, this puzzle has several features that make the solution far from trivial. This paper examines the puzzle and describes a simpler solution than that originally proposed by Boolos.

Boolos logic puzzle Smullyan true/false 


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  1. 1.
    Boolos, G.: The hardest logic puzzle ever, in The Harvard Review of Philosophy, Spring 1996, pp. 62–65.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Tim S. Roberts
    • 1
  1. 1.Faculty of Informatics and Communication Central Queensland UniversityBundaberg QueenslandAustralia

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