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Related Clues:
- It starts in your head
- Invention's origin
- Think about it
- Flash of brilliance, perhaps
- Start of a solution
- Inventor's ''light bulb''
- It might be bright
- It precedes an invention
- Genesis of many great inventions
- Gray cells' product
- Brainstorm result
- Theory, e.g.
- It may be half-baked
- Start of a novel?
- It could be a very good thought