Pinocchio was a wooden puppet blessed with life. However he had one curse or boon: His nose grew whenever he lied.
So the paradox is:
What will happen if Pinocchio says,” My nose will grow”.
If his nose grows, that means he must have lied, but that makes his statement a truth!
If his nose doesn’t grow, that means he hasn’t lied, but that makes his statement a lie!
Edit: Paradoxes aren’t ‘uncrackable‘ , they do have loopholes 🙂