NODTO
| Date | Clue |
|---|---|
| 2025-05-15 | Acknowledge nonverbally |
| 2025-01-09 | Point at, in a way |
| 2024-09-12 | Acknowledge wordlessly |
| 2023-04-23 | Acknowledge wordlessly |
| 2020-08-28 | Acknowledge, in a way |
| 2019-11-16 | Recognize silently |
| 2019-10-16 | Acknowledge silently |
| 2018-04-01 | Acknowledge without words |
| 2017-05-24 | Give the O.K. |
| 2015-12-13 | Silently acknowledge |
| 2006-11-14 | Acknowledge, in a way |
| 2004-03-07 | Give the ___ (pick) |
| 2003-07-10 | Signal, in a way |
| 2003-01-10 | Acknowledge |
| 2002-03-15 | Give the O.K. |
| 2001-06-03 | Acknowledge, in a way |
| 1999-05-08 | With a ___ (recognizing) |