Green Eyes - Logic Problem

Here it is (finally).
The hardest, logic puzzle I've came across.

The Green-Eyed People Problem

A group of people with assorted eye colors live on an island. They are
all perfect logicians -- if a conclusion can be logically deduced, they
will do it instantly. No one knows the color of their eyes. Every night
at midnight, a ferry stops at the island. Any islanders who have
figured out the color of their own eyes then leave the island, and the
rest stay. Everyone can see everyone else at all times and keeps a
count of the number of people they see with each eye color (excluding
themselves), but they cannot otherwise communicate. Everyone on the
island knows all the rules in this paragraph.

On this island there are 100 brown-eyed people, 100 green-eyed people,
and the Guru (she happens to have blue eyes). So any given green-eyed
person can see 100 people with brown eyes and 99 people with green eyes
(and one with green blue), but that does not tell him his own eye color; as
far as he knows the totals could be 101 brown and 99 green. Or 100
brown, 99 green, and he could have red eyes.

The Guru is allowed to speak once (let's say at noon), on one day in
all their endless years on the island. Standing before the islanders,
she says the following:


"I can see someone who has green eyes."


Who leaves the island, and on what night?


There are no mirrors or reflecting surfaces, nothing dumb. It is not a
trick question, and the answer is logical. It doesn't depend on tricky
wording or anyone lying or guessing, and it doesn't involve people
doing something silly like creating a sign language or doing genetics.
The Guru is not making eye contact with anyone in particular; she's
simply saying "I count at least one blue green-eyed person on this island who
isn't me."


And lastly, the answer is not "no one leaves."

----
Haha yeah, took me like..
3 days to find the answer. And then like 2 weeks to convince me that it was the correct one.

The Prize:
The first Person that can solve it & can explain why:
Gains access to the VIP ZONE

-PiercedDooD

-BUMP

*Fixed some typos (stroked), the correct words are underlined*

ya era hora ke lo arreglaras...
Todavia no me lo se but I'm close I can feel it!!!!?

Yo e pensado muchas cosas,muchas locuras como esa de que se sacan el ojo y miran de que color lo tienen o que se van 100 y los demas se quedan para siempre porque el guru solo ve a ojos verdes ademas el ingles para explicaciones y acertijos como este no se me da muy bien...

pedrosalero wrote:Yo e pensado muchas cosas,muchas locuras como esa de que se sacan el ojo y miran de que color lo tienen o que se van 100 y los demas se quedan para siempre porque el guru solo ve a ojos verdes ademas el ingles para explicaciones y acertijos como este no se me da muy bien...

A mi no se me da bien el espaniol para explicaciones
ademas, dejaba muchos huecos raros, en ingles es mas preciza la explicacion..
y no, no se sacaban el ojo, no sucede ninguna cosa(s) tonta(s)