Some problems with an apparently logical solution can suddenly reveal a different angle that poses new challenges
What is the solution to the blue-eyed islanders puzzle aka the hardest logic puzzle in the world? - Quora
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Exploring Assumptions with Monty Hall and Blue Eyed Islanders
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Can you solve the famously difficult green-eyed logic puzzle? - Alex Gendler
What is the solution to the blue-eyed islanders puzzle aka the hardest logic puzzle in the world? - Quora
The green-eyed logic puzzle, and the importance of meta-information, by Bảo Lê Đức
From empirical knowledge to the beginnings of scientific thought
Animal Spirits
What is the solution to the blue-eyed islanders puzzle aka the hardest logic puzzle in the world? - Quora
logical deduction - Blue eyes riddle: a counter-argument to accepted solution - Puzzling Stack Exchange