Historical clue formulations

• One dealing with a certain absence — 2025-03-15
• One experiencing gaps in memory — 2022-08-08
• Unlikely memoirist — 2014-06-01
• One drawing many blanks — 2010-11-06
• Patient of unknown origin? — 2004-04-11
• John Doe, maybe — 1996-08-11
• Definitely not a know-it-all — 1994-05-20