Historical clue formulations

• Foggy — 2022-01-22
• In a daze — 2021-12-09
• Mixed up — 2021-06-26
• Unable to think clearly — 2021-03-21
• Like many a ditz — 2012-09-23
• Non compos mentis — 2012-08-19
• Slaphappy, say — 2011-12-23
• Mixed up — 2000-08-15
• Confused — 1999-08-10
• Confused — 1999-04-07
• Fuzzy — 1996-03-08