Knights and Knaves: Grace, Bob, Heidi, and Alice
Verified— unique solution
knights knaves
On an island, every inhabitant is either a knight, who always tells the truth, or a knave, who always lies. You meet Grace, Bob, Heidi, and Alice.
Bob says: "Grace is a knave or I am a knave."
Heidi says: "Alice is a knave."
Alice says: "Grace is a knight."
The others say nothing.
Who is a knight and who is a knave?
Hints
Hint 1
Hint 2
Hint 3
Solution
Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.
Once you've worked out who is who: how many of the 4 inhabitants are knaves? Answer with the number.
Rate this puzzle
Report a problem with this puzzle
Comments
No comments yet
Be the first to say something about this puzzle.