| 2026-06-11 | Reservations |
| 2025-12-10 | "No ___!" |
| 2024-03-09 | "The origin of wisdom," per René Descartes |
| 2023-06-30 | "When in ___, don't" (maxim attributed to Benjamin Franklin) |
| 2022-04-07 | Impostor syndrome feeling |
| 2020-05-29 | Reservation |
| 2019-06-30 | Call into question |
| 2018-07-22 | Uncertainty |
| 2017-08-21 | "But what if I'm wrong?" feeling |
| 2017-03-20 | It may be reasonable to a jury |
| 2015-12-20 | "When in ___, tell the truth": Mark Twain |
| 2015-04-25 | "The beacon of the wise," per Shakespeare |
| 2011-06-25 | Its shadow is often cast |
| 2011-03-15 | "No ___!" ("Of course!") |
| 2003-01-05 | Question |
| 2000-08-06 | "When in ___ tell the truth": Twain |
| 1999-03-08 | Harbor suspicions |
| 1997-10-11 | "I ___ it" |
| 1997-09-05 | Cornerstone of Cartesianism |
| 1996-02-13 | Skepticism |
| 1994-03-15 | Act like the Apostle Thomas |