Can you solve the three gods riddle? - Alex Gendler
View full lesson: http://ed.ted.com/lessons/can-you-solve-the-three-gods-riddle-alex-gendler You and your team have crash-landed on an ancient planet. Can you appease the three alien overlords...
========== Created by logician Raymond Smullyan and popularized by his colleague
George Boolos, this riddle has been called the hardest
logic puzzle ever. You and your team have crash-landed
on an ancient planet. The only way off is to appease
its three alien overlords, Tee, Eff, and Arr, by giving them the correct artifacts. Unfortunately, you don't
know who is who. From an inscription, you learn that you
may ask three yes or no questions, each addressed to any one lord. Tee's answers are always true, Eff's are always false, and Arr's answer is random each time. But there's a problem. You've deciphered the language enough
to ask any question, but you don't know which of the two
words 'ozo' and 'ulu' means yes and w...