A letter was written with invisible ink, but the author left fingerprints on the page. What does this reveal about the letter’s intent?
Category: Mystery · Difficulty: expert
Hint: Think why someone would want to hide the message yet leave physical marks.
Answer
Sender wanted secret tracing
Explanation
Leaving fingerprints shows the sender anticipated traceability despite the hidden message, implying deliberate secrecy.
This is a expert mystery riddle — one of the harder riddles here. The answer is Sender wanted secret tracing.
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