Historical clue formulations

• Encourage — 2023-03-26
• Encourage, as in behavior — 2022-10-03
• Encourage, maybe too much — 2022-03-18
• Goad — 2022-01-05
• Spur — 2021-05-13
• Encourage — 2020-10-14
• Prod — 2019-06-10
• Goad — 2018-06-12
• Goad — 2018-03-26
• Urge — 2016-10-08
• Encourage — 2014-09-28
• Impel — 2013-03-29
• Urge — 2012-10-05
• Prod — 2011-03-15
• Goad — 2008-09-28
• Urge — 2008-09-08
• Incite — 2008-02-15
• Goad — 2007-07-23
• Prod — 2007-07-04
• Incite — 2003-07-27
• Incite — 2002-04-09
• Prod — 1998-07-18
• Incite — 1997-04-24
• Prod — 1995-04-23
• Incite a hen? — 1994-08-11