top | item 32668878

(no title)

jonhess | 3 years ago

> which also explains why ternary logic puzzles are so elegant.

Could you elaborate on that?

discuss

order

asimpletune|3 years ago

There’s an island of 100 people who are incapable of communicating with each other, besides what they can see with their own eyes. No one can see their own eye color. Everyone knows that there are only blue or brown eyes. One day a fairy appears before the islanders and says that at noon each day, islanders will be given a chance to leave if they know their own eye color. The fairy concludes the rules at 11am and also adds that at least one islander has brown eyes. That is Day 1.

On what day, in the longest case scenario, have all the islanders left? You can assume they are perfectly logical, and no guessing is allowed obviously.

There are also no tricks like mirrors or water or anything like that. It’s a logic puzzle not a lateral thinking one.

The solution demonstrates ternary logic.