A letter was mailed but the postmark date was from the future. How is this possible?
Category: Mystery · Difficulty: medium
Hint: Focus on machinery errors over sci-fi
Answer
Postmark machine was misset
Explanation
The machine applying the postmark was incorrectly set ahead, causing the date to appear from the future.
This is a medium mystery riddle — a moderate challenge for most people. The answer is Postmark machine was misset.
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