Logic puzzles have been developed to test students’ skill in logical reasoning. Two classes discussed here: The Island of Knights and Knaves Portia’s Casket Exploitation of the associativity of equivalence simpli es the problems considerably.
These puzzles have to do with a strange island inhabited by two types of people: people who only tell the truth (knights) and people who only tell lies (knaves). Raymond Smullyan collected dozens of puzzles like this in his book, What is the Name of This Book?. The following list progresses quickly from easy to very difficult. Knights and knaves. Knights and knaves is a classic puzzle most of you will likely have come across already. It comes in many different forms, but it generally goes as follows: You come across two doors on your path, guarded by two guards.