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What gets sharper the more you use it?
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Your mind.
Mary Spio
Deep Space Engineer
Answer from Mary's digital twin. Checkmark turns Green once she confirms it.
Blades wear down with use. The thing solving this riddle does the opposite.
spio.comYour mind.
Your mind gets sharper every time you use it. A knife does the opposite.
Why it’s fun
Knives and pencils come to mind first, and both get duller with use. The one thing that improves is the one doing the thinking.
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