Historical clue formulations

• Foolish sort — 2023-05-22
• Knucklehead — 2023-02-28
• Chucklehead — 2023-02-11
• One offering intense but unrequited affection, in modern usage — 2022-06-26
• Foolish person — 2022-05-05
• Nincompoop — 2021-07-20
• Fool — 2020-08-29
• Dimwit — 2018-03-15
• Dunderhead — 2017-03-31
• Fool — 2016-09-20
• Nitwit — 2016-02-07
• Boob — 2015-03-14
• Lamebrain — 2012-05-14
• Not the brightest bulb on the tree — 2010-11-09
• Lamebrain — 2009-12-15
• Nincompoop — 2009-07-06
• Fool — 2008-03-15
• Nitwit — 2007-06-14
• Fool — 2001-05-28
• Fool — 2001-01-24
• Fool — 1999-09-30
• Birdbrain — 1999-04-29
• Fool — 1998-11-15
• Ninny — 1998-10-17
• Dimwit — 1998-08-06
• Easy mark — 1995-06-29
• Ignoramus — 1995-05-15