Historical clue formulations

• Point at, in a way — 2025-01-09
• Acknowledge wordlessly — 2024-09-12
• Acknowledge wordlessly — 2023-04-23
• Acknowledge, in a way — 2020-08-28
• Recognize silently — 2019-11-16
• Acknowledge silently — 2019-10-16
• Give the O.K. — 2017-05-24
• Silently acknowledge — 2015-12-13
• Acknowledge, in a way — 2006-11-14
• Give the ___ (pick) — 2004-03-07
• Signal, in a way — 2003-07-10
• Acknowledge — 2003-01-10
• Give the O.K. — 2002-03-15
• Acknowledge, in a way — 2001-06-03
• With a ___ (recognizing) — 1999-05-08