1- Nothing says that there were 1000 islanders on the day the alien made his speech. Some may have discovered they eye color and died before. 2- Compare: “how

1- Nothing says that there were 1000 islanders on the day the alien made his speech. Some may have discovered they eye color and died before. 2- Compare: “how unusual it is to see another blue-eyed person like myself in this region of the world” with: “how unusual it is to see other blue-eyed persons like myself in this region of the world” To me, it is clear that the entire tribe the day the stranger makes his speech consists of N brown-eyed, and one single remaining blue-eyed. They immediately understand the same thing, and all commit suicide the next noon.