NODAT
| Date | Clue |
|---|---|
| 2026-08-16 | Acknowledge |
| 2025-07-13 | Acknowledge silently |
| 2024-01-17 | Silently acknowledge |
| 2020-04-17 | Say yes to without saying "yes" |
| 2018-04-28 | Signal silently |
| 2013-05-26 | Greet silently |
| 2012-09-09 | Silently greet |
| 2011-05-01 | Tacitly agree with |
| 2011-01-18 | Tacitly acknowledge |
| 2008-03-30 | Acknowledge tacitly |
| 2008-03-22 | Tacitly acknowledge |
| 2006-04-23 | Show agreement with |