Historical clue formulations

• Pondered — 2022-04-03
• Ruminated (on) — 2016-10-24
• Thought aloud — 2015-02-26
• Was reflective — 2013-08-30
• Pondered — 2012-04-04
• Pondered — 2011-03-07
• Said reflectively — 2010-04-30
• Pondered — 2008-09-01
• Meditated (on) — 2008-01-21
• Thought things over — 2005-01-24
• Pondered — 2002-06-25
• Was lost in thought — 2000-11-21
• Pondered — 1999-09-07
• Thought — 1998-02-06
• Considered, with "on" — 1997-02-20
• Pondered — 1996-05-27
• Reflected — 1994-04-17