A witness hears a conversation but the recorded audio is silent. What explains the missing sound?

Category: Mystery · Difficulty: hard

Hint: Think about communication methods that don’t produce sound.

Answer

The conversation was conducted in sign language nearby

Explanation

The witness saw hand gestures and inferred a conversation, but no sound was captured.

This is a hard mystery riddle — a tricky one that takes a little thought. The answer is The conversation was conducted in sign language nearby.

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