Island of Liars - Computer Engineering - Lecture Slides, Slides of Computer Science

Download Island of Liars - Computer Engineering - Lecture Slides and more Slides Computer Science in PDF only on Docsity! The Island of Liars and Truth-Tellers You meet a woman on the island. What single (yes/no) question can you ask her to determine whether she is a liar or a truth-teller? Setting for puzzles in the next few slides: You are on an island populated by two tribes. Members of one tribe consistently lie. Members of the other tribe always tell the truth. Tribe members can recognize one another, but you can’t tell them apart. You run into a man on the island and ask him whether he is a truth-teller. A blaring siren prevents you from hearing his answer. You inquire, “Sorry, did you say you’re a truth-teller?” He responds: “No, I did not.” To which tribe does the man belong? Docsity.com Meeting Two People on the Island You meet two people A and B on the island. A says, “Both of us are from the liars tribe.” Which tribe is A from? What about B? You meet two people, C and D on the island. C says, “Exactly one of us is from the liars tribe.” Which tribe is D from? You meet two people E and F on the island. E says, “It is not the case that both of us are from the truth-tellers tribe.” Which tribe is E from? What about F? You meet two people, G and H on the island. Each of the two makes a statement. Which tribes are G and H from? G says: “We are from different tribes.” H says: “G is from the liars tribe.” Docsity.com