Blue Eyes - The Hardest Logic Puzzle Ever

[Dragonthorne]

Also, if these people live on an island, how do they know what color blue is without some sort of example? So, apparently, it would be 99 days as the Guru would have to point someone out as example and say "This person has blue eyes."

[GoodLife]

It doesnt say if you are wrong then you can't go back to the ferry... just go to the dock, and say your eyes are blue, if they are not, then come back the next day and say they are brown...

[Dragonthorne]

They could have always asked the professor to make them a device from coconuts, woven tree-bark, some dirt, and a tooth from an island native that would indicate their eye color...

Oh wait...wrong island...

[michse]

Actually as everyone is completely logical everyone would go to the docks right away and say, they have blue eyes. Either it is true and you get on the ferry, or it isn't and you will never have a chance to get on the ferry anway.

[Argo]

Who won?

[Terin01]

I would be right on 100 people leaving on the night of the guru stating what eye color was...no where in the problem is it indicated they each only get ONE chance...making them wait to count how many are still there....IF they truely are logical people and this isn't the answer then they aren't very logical seeing as they have hundreds of chances...