One problem I'd been wondering how to solve: We want to enter Neverneverland and at the gates we are confronted with three old men. A sign next to them reads in English: "You can only pass if you identify who are the three before you. One, the Knight always tells the truth, one, the Knave always lies and, one, the Knexus nods his head as a yes if both others would answer the same way and as a no if one of the other men would not answer in the same way as the other. Theese wise men know all the languages in the world, they can understand you, but ah, they will not speak in YOUR language". In short: A is a liar B tells the truth C tells the result between A XOR B You do not know the language, therefore you do not know the sound of the words "yes" and "no" in their language. You must either do without the meaning or you must infere it. Come up with three questions you should ask the three men as to identify them. I have already worked up an entire theory, which I will submit if the problem is not a case of "incredibly simple/something I overlooked and will kick muself for".