REASON
| Date | Clue |
|---|---|
| 2025-02-27 | Grounds |
| 2023-03-01 | What "Why?" tries to uncover |
| 2018-01-20 | "Because I said so" is not one |
| 2014-03-21 | "The natural organ of truth": C. S. Lewis |
| 2011-01-02 | Use logic |
| 2010-08-08 | Why |
| 2009-06-10 | Justification |
| 2007-03-22 | Sanity |
| 2004-06-13 | Justification |
| 2003-03-24 | Sanity |
| 2002-10-10 | Good sense |
| 2002-01-13 | Why |
| 1996-09-16 | Why's answer |