I think there is a fallacy here actually. Some of the comments come close to touching it.
If there are 3 islanders with blue eyes, each can see 2 blue-eyed people. The information that there is at least 1 blue is therefore not new information, and can't change the outcome.
The outsider's comment is superfluous given that N > 3.
If there are 3 islanders with blue eyes, each can see 2 blue-eyed people. The information that there is at least 1 blue is therefore not new information, and can't change the outcome.
The outsider's comment is superfluous given that N > 3.