Three inhabitants, three different natures and a single possible assignment. Here, unlike other island puzzles, there is a type of inhabitant whose behavior does not follow any fixed pattern — and that changes everything.
The knight, the squire and the spy
Riddle statement
On an island there are three types of inhabitants:
- gentlemen, who always tell the truth;
- squires, who always lie;
- spies, who can tell the truth or lies.
You meet three people: A, B and C.
- A says: “B is a gentleman.”
- B says: “A is a gentleman.”
- C says: “A is a squire.”
Knowing that there is exactly one knight, a squire and a spy, who is who?