All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info
Home > Logic > Liars and Knights
These problems are from a very large set of questions about Liars who always lie about everything, and Knights who always tell the truth. Some questions also involve Knaves - people who strictly alternate between lying and telling the truth. (They are of course all indistinguishable from one another by outward appearance, and you must use logic to determine who's who.)
Difficulty: 3 of 5 Latest: An insane puzzle Rating: 5.00
Sane knights believe true statements and say true statements. Sane liars believe true statements, but say false statements. Insane knights believe false statements and say false statements. Insane liars believe false statements, but say true statements. You meet two people, A and B. Each is either a sane knight, a sane liar, an insane knight, or an insane liar.

A:I believe that B is a knight.
B:A is insane.
A:We are both sane.

What are A and B?

(No Solution Yet, 9 Comments) Submitted on 2023-11-11 by Math Man   
Page 3 of 13   << prev next >>    
Difficulty: 2 of 5Count the Liars | Rating: 3.00
Posted on 2014-12-23 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Odd people 2 | Rating: 2.67
Posted on 2014-10-07 by Math Man (Solution Posted, 2 Comments)
Difficulty: 4 of 5Inherited Veracity II | Rating: 5.00
Posted on 2014-09-12 by Dustin (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A Chamsonel Problem VII | Rating: 3.00
Posted on 2014-06-11 by K Sengupta (Solution Posted, 1 Comments)
Difficulty: 3 of 5Quiz Score Settlement | Rating: 2.33
Posted on 2014-05-13 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5A Chamsonel Problem VI |
Posted on 2014-05-01 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Wallet Wangle | Rating: 5.00
Posted on 2014-04-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A Chamsonel Problem V | Rating: 2.50
Posted on 2014-03-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Liars Logic 2 |
Posted on 2014-03-17 by tomarken (Solution Posted, 2 Comments)
Difficulty: 3 of 5Liars Logic | Rating: 4.00
Posted on 2014-03-13 by tomarken (Solution Posted, 1 Comments)
Difficulty: 3 of 5Neighbor Ponder |
Posted on 2014-02-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Tribe Travail |
Posted on 2014-01-21 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Which is Which III | Rating: 5.00
Posted on 2014-01-20 by K Sengupta (Solution Posted, 1 Comments)
Difficulty: 2 of 5Five Natives |
Posted on 2013-11-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Knaves! 2 | Rating: 3.00
Posted on 2013-10-22 by Math Man (Solution Posted, 3 Comments)
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (10)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2024 by Animus Pactum Consulting. All rights reserved. Privacy Information