I am a vault without walls, a keeper of secrets no key can unlock. I hold memories yet have no mind. What am I?
Category: Brain · Difficulty: hard
Hint: Consider something personal that stores thoughts safely.
Answer
A locked diary book
Explanation
A locked diary holds memories and secrets physically but cannot be opened without a key or permission. It's a personal vault, unlike the others, which are more literal or public.
This is a hard brain riddle — a tricky one that takes a little thought. The answer is A locked diary book.
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