1 / 8

The Island of Knights and Knaves

The Island of Knights and Knaves. Raymond Smullyan 1978. A little learning is a dangerous thing; Drink deep, or taste not the Pierian spring: There shallow draughts intoxicate the brain, And drinking largely sobers us again. Rules of the Island. Knights always tell the truth

cain
Télécharger la présentation

The Island of Knights and Knaves

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Island of Knights and Knaves

  2. Raymond Smullyan 1978 A little learning is a dangerous thing; Drink deep, or taste not the Pierian spring: There shallow draughts intoxicate the brain, And drinking largely sobers us again.

  3. Rules of the Island • Knights always tell the truth • Knaves always lie • Every inhabitant is either a knight or a knave

  4. #26 • There are three inhabitants standing in a garden. • A stranger passed by and asked A, “Are you a knight or a knave?” • A answered but the stranger did not understand him so he asked B “What did A say?” • B replied, “A said he was a knave.” • C said, “Don’t believe B; he is lying” • What are B and C?

  5. #27 • There are three inhabitants standing in a garden. • A stranger passed by and asked A, “How many knights are among you?” • A answered but the stranger did not understand him so he asked B “What did A say?” • B replied, “A said there is one knight among us.” • C said, “Don’t believe B; he is lying” • What are B and C?

  6. #28 • There are two inhabitants standing in a garden. • A says, “At least one of us is a knave.” • What are A and B?

  7. #29 • There are two inhabitants standing in a garden. • A says, “Either I am a knave or B is a knight.” • What are A and B?

  8. #30 • A is standing in a garden alone. • A says, “Either I am a knave or else two plus two equals five.” • What can you conclude?

More Related