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One Native, Two Roads (Posted on 2006-05-22) Difficulty: 3 of 5
You are lost once again in the land of Knights, Knaves, and Liars, and once again you find yourself at a fork in the road. You know that one path will lead you to a safe return home, while the other will lead you to your own gruesome demise. (You really need to find a better vacation spot next year!)

Standing at the fork is a native, who might be either a Knight (who always tells the truth), a Knave (who alternates between true and false statements), or a Liar (who always lies). You have no way of knowing which he is. Worse yet, you realize that if he is a knave, you don't know if he will tell you the truth first, and then lie, or lie first and then tell the truth, etc.

What is the fewest number of questions you have to ask to find out which is the safe road, and what are they?

See The Solution Submitted by tomarken    
Rating: 3.8333 (6 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionONE QUESTIONAndre2010-05-28 18:58:30
Some ThoughtsanswerK Sengupta2007-05-09 13:27:02
re: 3 to 5 questions, depending on who you figure out firstliz2006-06-09 09:48:16
3 to 5 questions, depending on who you figure out firstliz2006-06-09 09:27:09
Solution3 QuestionsDax Fuiten2006-05-29 00:11:03
Just a guessSalil2006-05-28 01:56:58
The safe roadGina Ernyey2006-05-26 14:15:54
re(4): The jury isn't in. (re: question and solution)Dej Mar2006-05-25 01:56:54
re(3): The jury isn't in. (re: question and solution)Venkat2006-05-25 00:34:35
re(2): The jury isn't in. (re: question and solution)Dej Mar2006-05-25 00:28:03
re: The jury isn't in. (re: question and solution)Venkat2006-05-24 23:44:13
Some ThoughtsThe jury isn't in. (re: question and solution)Dej Mar2006-05-24 08:26:24
re: My solutionVernon Lewis2006-05-23 07:17:33
Solutionsingle questionRobby Goetschalckx2006-05-23 03:36:33
My solutionCaleb2006-05-23 02:59:55
answerRachael2006-05-23 02:05:08
re: What I would doJosh2006-05-23 01:25:18
SolutionHome Sweet HomeDej Mar2006-05-23 00:57:41
re: What I would doMathManiac2006-05-22 23:18:28
SolutionWhat I would doVernon Lewis2006-05-22 17:09:17
2 questionsPatrick2006-05-22 15:18:09
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