Historical clue formulations

• Half-baked — 2023-05-28
• Inane — 2023-01-10
• Nonsensical — 2021-05-17
• Asinine — 2020-11-03
• Harebrained — 2019-03-01
• Not worth considering — 2016-10-06
• Beyond silly — 2013-07-13
• Hardly sharp — 2012-05-13
• Ridiculous — 2012-02-19
• Nutty as can be — 2012-01-14
• Nutty — 2007-06-03
• Inane — 2004-11-07
• Nonsensical — 2002-06-16
• Pumpkin-headed — 1998-10-16
• Crackbrained — 1994-12-23