All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Logic
Day-knights and night-knights 2 (Posted on 2011-03-15) Difficulty: 1 of 5
There is a land where every inhabitant is either a day-knight or a night-knight. Day-knights tell the truth in the day and lie at night. Night-knights lie in the day and tell the truth at night. An inhabitant of this land says, "I am a day-knight, and it is night." What is the inhabitant, and is it day or night?

  Submitted by Math Man    
Rating: 5.0000 (1 votes)
Solution: (Hide)
Suppose they are telling the truth. Then, they are a day-knight, and it is night. However, day-knights lie at night, so they are lying. Therefore, they are a night-knight, and it is day.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
No Subjectjec2011-03-30 02:34:25
answerDej Mar2011-03-16 08:41:31
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 (6)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information