Here's a short list of famous paradoxes that has not been solved yet, although solutions have been proposed:

1. Liar Paradox
2. Card Paradox
3. Omnipotence Paradox
4. Theseus’s Paradox
5. Grandfather Paradox
6. Bootstrap Paradox
7. Fermi's Paradox

Which one of these would you like to know more about?
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