在 Hacker News Daily 上看到的數學邏輯問題：「“Which answer in this list is the correct answer to this question?”」。
問題是這樣：
Which answer in this list is the correct answer to this question?
- All of the below.
- None of the below.
- All of the above.
- One of the above.
- None of the above.
- None of the above.
accepted 的那個是推演的答案，但最高分的那個是寫程式窮舉 XDDD (不得不說大家都很愛這味...)