Problem 23 Answer

Answer 1: Say, "Please point to the village you are from." Regardless of where they are from they will point to the truthful village.

Answer 2: You point to either path and say, "Are you from this village?" If the person answers 'yes' then you are pointing to the truthful village, if they answer 'no' then you are pointing to the lying village.

Answer 3: Ask "Which path would a person from the other village say leads to the truthful (or untruthful) village?" Regardless of whom you speak to the answer will filter through one lie, so if you ask for the truthful village the person will point to the lying village, and vise versa.

The Wizard of Odds, A.S.A.