Problem of the Month-Answer
ANSWER FOR PROBLEM OF THE MONTH
The guide was a truth-teller.
EXPLANATION:
If the native asked was from the eastern side, he would have said "western" and the guide, if a truth-teller, would have reported "western."
If the native asked was from the western side, he would have said "western" and the guide, if a truth-teller, would have also said "western."
If the native asked was from the eastern side, and the guide was dishonest, the native would have said "western" and the guide would have reported back "eastern."
If the native asked was from the western side, and the guide was dishonest, the native would have said "western" and the guide would have reported back "eastern."
Since the guide reported back "western", then the guide was a truth-teller.
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